US20040077002A1 - Growth arrest homeobox gene - Google Patents
Growth arrest homeobox gene Download PDFInfo
- Publication number
- US20040077002A1 US20040077002A1 US10/638,746 US63874603A US2004077002A1 US 20040077002 A1 US20040077002 A1 US 20040077002A1 US 63874603 A US63874603 A US 63874603A US 2004077002 A1 US2004077002 A1 US 2004077002A1
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- Prior art keywords
- protein
- gax
- smooth muscle
- vascular smooth
- ser
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4702—Regulators; Modulating activity
- C07K14/4703—Inhibitors; Suppressors
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Definitions
- Atherosclerosis is a disease affecting the large and medium size muscular arteries such as the coronary or carotid arteries and the large elastic arteries such as the aorta, iliac, and femoral arteries. This disease causes narrowing and calcification of arteries. The narrowing results from deposits of substances in the blood in combination with proliferating vascular smooth muscle cells.
- the deposits known as atherosclerotic plaques are comprised of lipoproteins, mainly cholesterol, proliferating vascular smooth muscle cells and fibrous tissue, and extra cellular matrix components, which are secreted by vascular smooth muscle cells.
- lipoproteins mainly cholesterol, proliferating vascular smooth muscle cells and fibrous tissue, and extra cellular matrix components, which are secreted by vascular smooth muscle cells.
- the resulting complications potentially include a complete blockage of the lumen of the artery, with ischemia and necrosis of the organ supplied by the artery, ulceration and thrombus formation with associated embolism, calcification, and aneurysmal dilation.
- Atherosclerosis When atherosclerosis causes occlusion of the coronary arteries, it leads to myocardial disfunction, ischemia and infarction and often death. Indeed, 20-25% of deaths in the United States are attributable to atherosclerotic heart disease. Atherosclerosis also leads to lower extremity gangrene, strokes, mesenteric occlusion, ischemic encephalopathy, and renal failure, depending on the specific vasculature involved. Approximately 50% of all deaths in the United States can be attributed to atherosclerosis and its complications.
- vascular smooth muscle cells de-differentiate and proliferate and leading to leading to reocclusion of the vessel. These de-differentiated vascular smooth muscle cells deposit collagen and other matrix substances, that contribute to the narrowing of vessel.
- vascular smooth muscle cells secrete growth factors such as platelet derived growth factor, which induces both chemotaxis and proliferation of vascular smooth muscle cells.
- Surgical treatments include coronary artery bypass grafting, balloon angioplasty, or vessel endarterectomy which, when successful, bypass or unblock occluded arteries thereby restoring blood flow through the artery.
- the surgical treatments do not halt or reverse the progression of the disease because they do not affect smooth muscle cell proliferation and secretion of extra cellular matrix components.
- the bypass surgeries are major, complicated surgeries which involve a significant degree of risk.
- the balloon angioplasty while also a surgical procedure, is less risky.
- a catheter having a deflated balloon is inserted into an artery and positioned next to the plaque.
- the balloon is inflated thereby compressing the plaque against the arterial wall.
- the occlusion is decreased and increased blood flow is restored.
- the balloon angioplasty injures the arterial wall.
- the underlying vascular smooth muscle cells migrate to the intima, and synthesize and excrete extracellular matrix components eventually leading to the reocclusion of the vessel.
- the antisense oligonucleotides are applied in a pleuronic gel to the adventitia, that is, the exterior, rather than the lumen side of the affected vessel. Exposing the the exterior of the vessel requires additional surgery with its attendant risks, and is therefore not desirable.
- a novel growth arrest homeobox gene has been discovered and the nucleotide sequences have been determined in both the rat and the human.
- the expression of the novel homeobox gene inhibits vascular smooth muscle cell growth.
- the growth arrest homeobox gene hereinafter referred to as the “Gax gene” and its corresponding proteins are useful in the study of vascular smooth muscle cell proliferation and in the treatment of blood vessel diseases that result from excessive smooth muscle cell proliferation, particularly after balloon angioplasty.
- FIG. 1 is the nucleotide sequence of rat Gax gene with the predicted amino acid sequence listed below the nucleotide sequence.
- the homeobox is indicated by a box, and the CAX nucleotide repeat, where X is ether cytosine or guanine, is underlined.
- a polyadenylation signal is in boldface and italics.
- Putative consensus sites are indicated as follows: for phosphorylation by protein kinase C, circles; for cyclic AMP (cAMP)-dependent protein kinase, squares; for casein kinase II, diamonds; and for histone H1 kinase, triangles. Residues which could potentially be a target for either cAMP-dependent protein kinase or protein kinase C are both circled and boxed.
- cAMP cyclic AMP
- FIG. 2 is the map of mouse chromosome 12 showing the location of the Gax gene
- FIG. 3 is the nucleotide sequence of human Gax gene with the predicted amino acid sequence listed below the nucleotide sequence;
- FIG. 4 is a map of human Gax gene showing how the separately cloned fragments were joined and oriented in the plasmid, Bluescript IISK+;
- FIG. 5A is a northern blot showing Gax RNA levels in vascular smooth muscle cells in response to 10% fetal calf serum after 4, 24, and 48 hours; lane Q is RNA from quiescent cells; GAPDH is rat glyceraldehyde 3-phosphate dehydrogenase;
- Figure 5B is a northern blot showing Gax RNA levels and Hox 1.3 RNA levels in vascular smooth muscle cells in response to 10 ng/ml human platelet derived growth factor at 0.25, 0.5, 1, 2, and 4 hours, lane Q is RNA from quiescent vascular smooth muscle cells;
- FIG. 6 is a graph of changes in relative Gax mRNA levels in vascular smooth muscle cells in response to 10% fetal calf serum and 10 mg/ml of the PDGF isoforms; the circles represent PDGF-AA, the squares represent PDGF-BB, the diamonds represent fetal calf serum, and the triangles represent PDGF-AB;
- FIG. 7 is a graph showing 3 H-thymidine uptake in vascular smooth muscle cells at various times after stimulation with fetal calf serum and PDGF isoforms; the circles represent PDGF-AA, the triangles represent PDGF-AB, the squares represent PDGF-BB, the diamonds represent fetal calf serum, and the solid squares represent no mitogen;
- FIG. 8 is a graph showing relative Gax mRNA levels in vascular smooth muscle cells in response to varying doses of PDGF-AB, represented by triangles, and PDGF-BB, represented by squares;
- FIG. 9 is a graph showing relative Gax mRNA levels in vascular smooth muscle cells in response to varying doses of fetal calf serum;
- FIG. 10 is a graph showing relative Gax mRNA levels in vascular smooth muscle cells in response to fetal calf serum withdrawal;
- FIG. 11 is a dose response curve showing % inhibition of growth in vascular smooth muscle cells in response to varying doses of microinjected GST-Gax protein
- FIG. 12 is a graph showing percent inhibition of mitogen induced DNA synthesis in vascular smooth muscle cells in response to: ras (Leu-61) protein; ras (Leu-61). protein in combination with the GST-Gax protein; GST-Gax protein; and the GST;.
- FIG. 13 is a graph showing percent inhibition vascular smooth muscle cell entry into S phase by microinjected GST-Gax protein over time and the 3 H-thymidine uptake over the same time period;
- FIG. 14 is a graph showing the ratio of the Gax mRNA to glyceraldehyde-3-phosphate dehydrogenase designated “G3” level from normal vascular tissue and times following acute blood vessel injury.
- Gax gene A novel gene, the Gax gene, has been discovered, the expression of which inhibits vascular smooth muscle cell growth.
- the Gax gene and the protein it encodes, referred to herein as the “Gax protein” are useful in the study of vascular smooth muscle cell proliferation and in inhibiting smooth muscle cell proliferation.
- the inhibition of vascular smooth muscle cell proliferation, particularly by genetic therapy, is also useful in the treatment of vascular diseases associated with excessive smooth muscle cell proliferation.
- Nucleotide sequences such as the Gax gene or portions therof, or mRNA are administered to the vascular cells, preferably during a balloon angioplasty procedure, to inhibit the proliferation of vascular smooth muscle cells.
- the nucleotide sequences are delivered, preferably to the interior of the vessel wall during balloon angioplasty procedure preferably by a perforated balloon catheter.
- Genes are transfered from vectors into vascular smooth muscle cells in vivo where the genes are expressed. Suitable vectors and procedures for the transfer of nucleotides are found in Nabel, E. G., et al. “Site-Specific Gene Expression in Vivo by Direct Gene Transfer into the Arterial Wall” (1990) Science Vol. 249, pp.
- Gax proteins or portions thereof are administered to vascular cells preferably employing the perforated catheter, to inhibit the proliferation of vascular smooth muscle cells.
- a class of genes known as Homeobox genes, encode a class of transcription factors which are important in embryogenesis, tissue specific gene expression and cell differentiation.
- the homeobox genes share a highly conserved 183 nucletide sequence that is referred to as the “homeobox”.
- the homeobox encodes a 61 amino acid helix-turn-helix motif that binds to adenine and thymine rich gene regulatory sequences with high affinity.
- Several vertebrate homeobox proteins have been shown to be transcription factors required for expression of lineage-specific genes. The tissue-specific transcription factors bind to DNA and repress or induce groups of subordinate genes.
- Hox clusters Many, but not all of these homeobox genes are located in one of four major clusters known as Hox clusters, designated Hox-1, Hox-2, Hox-3 and Hox-4.
- the Hox genes are expressed in the developing embryo, in distinct overlapping spatial patterns along the anterior-posterior axis which parallels the Hox gene order along the chromosome.
- Homeobox transcription factors control axial patterning, cell migration and differentiation in the developing embryo and are involved in the maintenance of tissue specific gene expression in adult organisms.
- Gax gene A new homebox gene has been discovered, isolated and sequenced in both the rat and human. This new gene is a growth arrest specific homeobox gene and is referred to herein as the “Gax gene”. The expression of the Gax gene is restricted to the cardiovascular system, and in particular, to vascular smooth muscle cells where it functions as a negative regulator of cell proliferation.
- the nucleotide sequence of the rat Gax gene is shown in FIG. 1.
- the cDNA encoding Gax is 2,244 base pairs in length, which corresponds to the size of the Gax transcript, that is the Gax mRNA, which is about 2.3 to 2.4 kb as determined by Northern blot analysis.
- the Gax cDNA has an open reading frame from nucleotide residues 197 to 1108 beginning with an in-frame methionine that conforms to the eukaryotic consensus sequence for the start of translation and is preceded by multiple stop codons in all three reading frames.
- the open reading frame of the cDNA predicts a 33.6-kDa protein containing 303 amino acids with a homeodomain from amino acid residues 185 to 245, as shown in FIG. 1.
- the Gax open reading frame was fused in frame to the pQE-9 E. coli expression vector, from Qiagen, Inc., Chatsworth, Calif. and expressed in bacteria according to Hochuli, E., et. al. (1988) “Genetic Approach to Facilitate Purification of Recombinant Proteins with a Novel Metal Chelate Adsorbent” Bio/Technology Vol. 6, pp. 1321-1325 . E.
- coli containing this plasmid expressed a new phosphorylated protein of about 30 to about 36 kDa as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and extracts from these E. coli cells displayed a weak binding activity for the adenine and thymine rich, MHox-binding site in the creatine kinase M enhancer.
- the cDNA encoding the rat Gax gene also contains a long 3′-untranslated region, from bases 1109 to 2244, with a polyadenylation signal at base 2237, as shown in FIG. 1.
- the region between amino acids 87 and 184 contains 23 serine amino acids out of 88 amino acids and 10 proline amino acids out of 88 amino acids and contains several consensus sequences for phosphorylation by protein kinases.
- Gax also possesses a structural feature which is also found in several transcription factors, including homeodomain proteins, known as the CAX or Opa transcribed repeat.
- the Opa transcribed repeat encodes a stretch of glutamines and histidines; in the rat Gax gene it encodes 18 residues, of which 12 are consecutive histidines. This motif is shared by other transcription factors, such as the zinc finger gene YY-1, as well as by several homeobox genes, including H2.0, HB24, ERA-1 (Hox-1.6), Dual bar, and Tes-1.
- the Gax protein may require post-translational modifications for full activity, modifications that bacterially produced proteins do not undergo. Since the Gax protein has multiple consensus sites for phosphorylation by protein kinases, it is possible that its activity is activated or otherwise modulated by phosphorylation at one or more of those sites.
- Gax is located on chromosome 12 as shown in FIG. 2 of the mouse and is not a part of the Hox-1, Hox-2, Hox-3, or Hox-4 gene clusters, which are located on chromosomes 6, 11, 15, and 2, respectively, McGinnis, W., and R. Krumlauf, (1992) “Homeobox genes and Axial Patterning” Cell , Vol. 68, pp. 283-302. Also Gax does not cosegregate with any other homeobox genes previously mapped in the interspecific backcross.
- the mouse chromosomal location of the Gax was determined by interspecific backcross analysis using progeny generated by mating (C57BL/6J x Mus spretus)F 1 females and C57BL/6J males.
- the C57BL/6J and M. spretus DNAs were digested with several enzymes and analyzed by Southern blot hybridization for informative restriction fragment length polymorphisms with a rat cDNA Gax probe.
- the probe a 1,155-bp rat cDNA clone, was labeled with ( ⁇ - 32 p)dCTP by using a random prime labeling kit from Amersham and washing was done with a final stringency of 0.2 ⁇ SSCP (34) ⁇ 0.1% sodium dodecyl sulfate, 65° C.
- a major fragment of 4.2 kb was detected in HincII-digested C57BL/6J DNA, and major fragments of 3.6 and 2.7 kb were detected in HincII-digested M. spretus DNA.
- the 3.6-kb and 2.7-kb M. spretus HincII restriction fragment length polymorphisms were used to monitor the segregation of the Gax locus in backcross mice. Recombination distances were calculated by using the computer program SPRETUS MADNESS. Gene order was determined by minimizing the number of recombination events required to explain the allele distribution patterns.
- mouse Gax gene is located in the proximal region of mouse chromosome 12 linked to neuroblastoma myc-related.
- oncogene 1 (Nmyc-1), the laminin B1 subunit gene (Lamb-1), a DNA segment, chromosome 12, the Nyu 1 gene (D12Nyu1), and the ⁇ -spectrin gene (Spnb-1).
- the recombination frequencies, expressed as genetic distances in centimorgans ⁇ the standard error, are as follows: Nmyc-1-9.8 ⁇ 2.2-Lamb-1-5.4 ⁇ 1.8-Gax-6.0 ⁇ 1.9-D12Nyul-10.3 ⁇ 2.2-Spnb-1.
- Gax transcript is largely confined to the cardiovascular system, including the descending thoracic aorta, where it is expressed at higher levels than in other tissues, and the heart. Gax gene expression was also detected in the adult lung and kidney where it is found in mesangial cells. No Gax gene expression was detected in the brain, liver, skeletal muscle, spleen, stomach, or testes, nor was expression detected in the intestine or pancreas. In contrast, the Gax gene was more widely expressed in the developing embryo, with the transcript detectable in the developing cardiovascular system, multiple mesodermal tissues, and some ectodermal tissues.
- Gax RNA transcript The 2.3-kb to 2.4-kb Gax RNA transcript was detected in smooth muscle cells cultured from adult rat aorta, consistent with the in situ hybridization findings and the fact that Gax was originally isolated from a vascular smooth muscle library.
- the Gax transcript was also detected in rat vascular smooth muscle cells transformed by simian virus 40.
- no Gax gene expression was detected in either of two cell lines derived from embryonic rat aortic smooth muscle, A7r5 and A10.
- the Gax transcript was also not detected in NIH 3T3 fibroblasts, or human foreskin fibroblasts.
- the Gax transcript was not detected in the skeletal muscle cell line C2C12.
- a relatively high level of Gax gene expression was detected in cultured rat mesangial cells.
- Mesangial cells share many similarities to vascular smooth muscle cells, both structurally and functionally, and proliferate abnormally in renal diseases such as glomerulonephritis and glomerulosclerosis.
- the nucleotide sequence of the human Gax gene coding sequence is shown in FIG. 3. Approximately 1 ⁇ 10 6 plaques from a human genomic library in ⁇ FixII available from Stratagene were screened by conventional methods with a random primed EcoRI/BstXI fragment encompassing nucleotides 485-1151 of the rat Gax cDNA. Two clones contained the second exon of human Gax gene, having 182 base pairs. Using this coding information, the rest of the coding region was cloned by polymerase chain reaction methods.
- the following reagent concentrations were used in the reverse transcriptase reaction: 1 ⁇ g of total internal mammary artery RNA; 50 mM Tris-HCl pH 8.5; 30 mM KCl; 8 mM MgCl 2 ; 1 mM DTT; 20 units RNAsin from Boehringer Mannheim; 1 mM each of DATP, dTTP, dGTP, and dCTP; 0.5 ⁇ g random hexamers from Boehringer Mannheim; and 40 u of AMV reverse transcriptase from Boehringer Mannheim, in a total volume of 20 ⁇ L. This was incubated for 1 hour at 42° C., heat inactivated, and then stored at ⁇ 80° C. before use.
- the cycling protocol was as follows: 94° C. for two minutes, then 30 cycles of 94° C. for 30 seconds, 45° C. for 1 minute, and 72° C. for 1 minute. A second amplification was then performed on 10% of the primary reaction products using the H2 primer and a degenerate antisense oligonucleotide primer known as “P2B” against the carboxy terminal peptide.
- the cycling parameters were: 94° C. for two minutes followed by 30 cycles of 94° C. for 30 seconds, 40° C. for 30 seconds, 50° C. for 1 minute and 72° C. for 1 minute.
- the 5′ end of the human coding region was amplified using an anchored polymerase chain reaction kit, available under the tradename “5′-Amplifinder RACE” from Clonetech according to the manufacturer's instructions.
- This method uses single stranded RNA ligase to ligate an anchor oligonucleotide onto the 3′ end of appropriately primed first strand cDNA.
- Templates used were either human heart polyA+ RNA obtained from Clonetech or polyA+ RNA isolated from primary cultures of human vascular smooth muscle cells obtained from Clonetics.
- the polyA+ RNA from cultured vascular smooth muscle cells was purified with RNAzol B from Biotecx using batch chromatography on Oligo-dT latex beads from Qiagen.
- RNA templates were prepared by either specific priming or priming with random hexamers from Boehringer Mannheim. In general, the specific primed templates yielded longer clones but could not be used for multiple step wise amplification of the rest of the coding region.
- Amplification from anchored templates using the sense anchor primer and appropriate antisense specific primers was accomplished using ampliwax beads from Perkin Elmer and “hot start” polymerase chain reaction using the same reaction conditions as above, but with 0.2 ⁇ M primers in a total volume of 50 ⁇ L.
- the cycling protocol was as follows: 94° C. for 2 minutes then 30 cycles of 94° C. 45 seconds, 60° C. 45 second, and 72° C. for 1.5 minutes, followed by a final extension of 72° C. for 10 minutes. Following a primary amplification, aliquots (10-20%) of the reactions were run out on 2% Biogel agarose from Bio101 and size selected.
- a summary of the primer pairs sense/antisense used to amplify the complete coding region follows: position Clone # Source of Template 1° 2° 5′-3′ 6 dN6 primed IMA whole RNA H2 H2/P2B 699-941 23 H2R primed Heart AP/H2R AP/H3 231-698 polyA + RNA 117 dN6 primed VSMC AP/H6 AP/H6 119-230 poly A + RNA 131 dN6 primed VSMC AP/H6 AP/H7 1-118 poly A + RNA
- Clones were pieced together 3′-5′ as follows: fragments 6 and 23 share engineered. BglII sites; fragments 23 and 117 share a native SfaNI site; fragment 117 has. a native NcoI site which is compatible with an engineered BspHI site in fragment 131. Both engineered sites have a single base change in the wobble base of leucine codons, as noted on the final sequence as shown in FIG. 3.
- Once assembled the molecule was excised by digestion with EcoRI and HindIII. The map in FIG. 4 shows the molecule and its orientation.
- Gax Gene Expression is Down-regulated in Cultured Vascular Smooth Muscle Cells upon Mitogen Stimulation
- Gax gene is expressed in quiescent vascular smooth muscle cells. Since platelet derived growth factor hereinafter also referred to as “PDGF” and other growth factors regulate vascular smooth muscle proliferation and differentiation, differences in Gax gene expression in response to PDGF and other mitogens such as fetal calf serum were examined in cultured vascular myocytes.
- PDGF platelet derived growth factor
- mitogens such as fetal calf serum
- rat smooth muscle cells were obtained from the media of aortas isolated from adult male Sprague-Dawley rats. Cells were seeded onto dishes in medium containing a 1:1 mixture of Dulbecco's modified Eagle's medium and Ham's F12 and supplemented with 10% newborn calf serum. Once established, the cells were maintained at 37° C. in a humidified atmosphere of 5% carbon dioxide, and subcultured within three days after reaching confluence. Vascular smooth muscle cells were labeled with monoclonal antibodies to smooth muscle ⁇ -actin from Sigma Chemical Co. to verify identity.
- RNA from rat cultured cells was prepared by the guanidine thiocyanate method according to Chomcynzski, P., and N. Sacchi, (1987) “Single-step Method of RNA Isolation by Acid Guanidinium Thiocyanate-phenol-chloroform Extraction” Anal. Biochem . Vol. 162, pp. 156-159, fractionated on 1.2% agarose gels containing formaldehyde, and blotted onto nylon membranes. The RNA from cultured cells was separated on 30-cm gels for transcript size determination and on 10-cm gels for other studies.
- Hybridizations were carried out at 65° C. in buffer containing 0.5 M sodium phosphate at pH 7.0, 7% sodium dodecyl sulfate, 1 mM EDTA, and 1% bovine serum albumin, using a cDNA probe labeled by random priming consisting of a truncated Gax CDNA lacking the 5′ end and the CAX repeat, where the X may be cytosine or guanine.
- Probes for Hox-1.3 and Hox-1.4 consisted of the cDNAs isolated from the rat aorta library, and the probe for Hox-1.11 consisted of the DraI-EcoRI fragment of its cDNA. The blots were washed with a final stringency.
- Gax mRNA and GAPDH mRNA were quantified with a Molecular Dynamics model 400S PhosphorImager to integrate bank intensities, or by scanning densitometry of autoradiograms. In all quantitative comparisons of Gax mRNA levels between experimental groups, Gax mRNA levels were normalized to the corresponding GAPDH level determined on the same blot, to account for differences in RNA loading.
- Rat vascular smooth muscle cells grown to a greater than about 90% confluence, were placed in low-serum medium containing 0.5% calf serum for 3 days, to induce quiescence. At this time, the medium was removed from the cells and replaced with fresh medium containing either 10% fetal calf serum or 10 ng/ml platelet derived growth factor from human platelets. The cells were then incubated for the various times in the presence of either the fetal calf serum or the PDGF. As a control, quiescent cells were incubated with fresh serum-free medium alone. The cells exposed to PDGF were harvested at 0.25, 0.5, 1, 2, and 4 hours, and the cellular RNA isolated. The cells exposed to human fetal calf serum were harvested at 4, 24, and 48 hours. The Gax and the Hox -mRNA levels were determined by Northern blot analysis. Typical results are shown in FIGS. 5A and 5B.
- a rapid down-regulation that is a reduction in the amount of Gax mRNA, occurred in the vascular smooth muscle cells when they were stimulated with either fetal calf serum or PDGF as shown in FIGS. 5A and 5B.
- the down-regulation ranged from 5- to nearly 20-fold, depending on the mitogen used and the experiment.
- the down-regulation typically occurred within 2 hours after stimulation with fetal calf serum or PDGF, and was maximal at 4 hours.
- Gax mRNA transcript levels began to recover significantly by approximately 24 hours and approached baseline between 24 and 48 hours after stimulation. The rate of recovery varied with the magnitude of the initial down-regulation and the individual cell culture preparations.
- PDGF While PDGF isolated from human platelets caused a rapid down-regulation of Gax, it had little or no effect on Hox-1.3 mRNA levels. Neither fetal calf serum nor any of the three isoforms of PDGF showed any effect on the transcript levels of Hox-1.3, Hox-1.4, or Hox-1.11, homeobox genes which were also isolated from the vascular smooth muscle library.
- PDGF is a homodimer or heterodimer made of various combination of two chains, A and B.
- PDGF-AA isoforms of PDGF
- PDGF-AB isoforms of PDGF
- PDGF-BB isoforms of PDGF
- the PDGF-AA, PDGF-AB and PDGF-BB were compared for their effect on Gax expression.
- Quiescent rat vascular smooth muscle cell received 10 ng/ml of either PDGF-AA, PDGF-AB, PDGF-BB, or 10% fetal calf serum. After 0, 1, 2, 4 and 8 hours the cells were harvested and the Gax mRNA level determined. The results are shown in FIG. 6.
- PDGF-AA did not down-regulate Gax gene expression in vascular smooth muscle cells, whereas the PDGF-AB. and PDGF-BB isoforms, and the fetal calf serum reduced Gax gene expression approximately 10-fold by 4 hours. The greatest down-regulation occurred with the fetal calf serum followed by that with PDGF-BB and PDGF-AB.
- PDGF-AA at 10 ng/ml, which was ineffective in causing Gax gene down-regulation, only weakly stimulated DNA synthesis as shown in FIG. 7.
- PDGF-AB and PDGF-BB both stimulated cell proliferation as measured by 3 H-thymidine uptake at 15 hours.
- the fetal calf serum which was most effective at down regulating Gax gene expression, was also the most effective mitogen, that is it demonstrated the greatest 3 H-thymidine uptake.
- the dose response curves reveal that the 50% effective dose for Gax gene down-regulation 4 hours after PDGF-AB stimulation is between 4 and 8 ng/ml.
- the 50% effective dose for Gax gene down regulation 4 hours after PDGF-BB stimulation is between 2 and 5 ng/ml.
- the 50% effective dose for Gax down regulation 4 hours after fetal calf serum is approximately 1%, as shown in FIG. 9.
- 10% fetal calf serum suppresses Gax mRNA levels nearly 20-fold at 4 hours, an effect larger than that of a maximal stimulatory dose of PDGF-BB (30 ng/ml), which has a 10-fold effect, or of PDGF-AB, which has a less than 8-fold effect, as shown in FIG. 6.
- the down-regulation of Gax gene induced by either fetal calf serum or the different isoforms of PDGF correlates well with their abilities to stimulate DNA synthesis as measured by 3 H-thymidine uptake.
- Gax gene down-regulation is sensitive to low levels of mitogen stimulation, which cause a significant decrease in Gax mRNA levels.
- stimulation of quiescent rat vascular smooth muscle cells with 1% fetal calf serum caused a 40% decrease in Gax mRNA levels after 4 hours.
- such stimulation increased 3 H-thymidine uptake less than two-fold over that observed in quiescent vascular smooth muscle cells (data not shown).
- Gax Expression is Up-regulated or Induced when Synchronously Growing Cells are Deprived of Serum
- Sparsely plated vascular smooth muscle cells were grown in a medium containing 20% fetal calf serum, and then placed into serum free medium. The RNA was harvested at various times from 0 to 25 hours. The total mRNA was extracted and subjected to Northern Blot Analysis, then the mRNA transcript of Gax.was quantified.
- the expression of the Gax gene was induced fivefold in vascular smooth muscle cells within 24 hours after the rapidly growing cells were placed in the serum-free medium.
- expression of Gax gene is regulated by the growth state of the cell, and its downregulation is a prominent feature of the G 0 /G 1 transition in these cells.
- Gax Protein Inhibits Mitogen-Induced S Phase Entry in Vascular Smooth Muscle Cells
- Gax gene was expressed as a glutathione S-transferase (hereinafter also referred to as “GST”) fusion protein in bacteria and microinjected it into quiescent vascular smooth muscle cells.
- GST glutathione S-transferase
- the CDNA coding regions for Gax was fused in frame to the pGEX-2T expression vector obtained from Pharmacia Biotechnology, and then expressed in E. coli .
- GST-Gax was produced according to the following procedure: the coding region of Gax cDNA spanning from nucleotides 200-1108 was amplified by polymerase chain reaction methods using the following primers: 5′GCGCGCGTCGACGAACACCCCCTCTTTGGC 3′ and 5′GCGCGCAAGCTTTCATAAGTGTGCGTGCTC 3′
- the resulting DNA was digested with SalI and HindIII restriction enzymes and cloned into SalI and HindIII sites in the polylinker of pGEM3-lT in vitro transcription translation vector described in Patel R.C. and Sen G.C. (1992) “Identification of the Double-stranded RNA-binding Domain in the Human Interferon-inducible Protein Kinase,” J. Biol. Chem . Vol. 267; pp. 7671-7676.
- the BamHI to NaeI fragment of pGEM3-lT containing the Gax coding region was then sub-cloned into the same sites of pGEX-2T.
- the pGEX-2T vector with the YY1 cDNA, used to produce GST-YY1, was from Thomas Shenk at Princeton University.
- the resultant glutathione S-transferase fusion proteins were purified by affinity chromatography on glutathione-agarose beads.
- E. coli XL1-blue cells were then transformed with the appropriate plasmid and were grown to a density of 0.6-0.8 A 600 and induced with 0.5 mM isopropyl-B-D-thiogalectopyrenoside for 2 hours.
- the cells were harvested and lysed by ultrasonic vibration in phosphate buffered saline containing 1% triton x-100, lmM PMSF and 5 ⁇ g/ml aprotinin. The lysate was centrifuged at 15,000 ⁇ g and the supernatant was collected.
- the supernatant was bound to the glutathione sepharbse from Pharmacia (0.5 ml of resin per 100ml of bacterial culture) for 2 hours on a rotator at 25 rpm.
- the slurry was pelleted by centrifugation at 1000 ⁇ g for 2 minutes, then washed twice with complete lysis buffer then washed twice with lysis buffer lacking triton x-100.
- the bound protein was eluated for 30 minutes with phosphate buffered saline containing 10 mM reduced glutathione, from Sigma Chemical Company, 40 mM DTT and 150 mM NaCI. Purity of the GST-Gax protein was greater than 90% as determined by SDS-PAGE gels stained with Coomassie blue.
- proteins were concentrated in a buffer containing of 20 mM Tris, 40 mM KC1, 0.1 mM EDTA, 1 mM ⁇ -mercaptoethanol, and 2% glycerol using Centricon-30 from Amicon microconcentrators. Concentrated proteins were stored in this buffer in aliquots at ⁇ 80° C.
- Microinjections were performed using a semiautomatic microinjection system from Eppendorf Inc. in conjunction with a Nikon Diaphot phase contrast microscope. According to Peperkole, R., et al. (1988) Proc. Natl. Acad. Sci. USA Vol. 85, pp. 6758-6752, The injection pressure was set at. 70-200 hPa and the injection time was 0.3 to 0.6 seconds.
- BrdU 5′-bromo-2′-deoxyuridine
- IL represents the number of injected labeling positive for BrdU
- IT the total number of injected cells
- CL the number of control-injected cells labeling with BrdU
- CT the total number of control-injected cells counted.
- the effect of the Gax protein was compared to proteins known to effect cell proliferation, and to control proteins.
- Such comparison proteins include a neutralizing antibody against ras, “Y13-259, ” which is highly effective in blocking S phase entry when microinjected into NIH3T3 cells; the transcription factor MHox, a homeodomain protein unlikely to have an inhibitory effect on cell proliferation; and YY1, a zinc finger transcription factor unlikely to have a negative effect on cell growth.
- the GST-Gax protein inhibited vascular smooth muscle cell entry into S-phase by 42.7%.
- the GST Gax protein effect on mitogen-stimulated entry into S phase is specific.
- the other injected proteins GST, YY1, MHox and the mouse anti-human IgG failed to inhibit vascular smooth muscle cell growth.
- the antibody Y13-259 as anticipated, significantly decreased mitogen-induced cell proliferation.
- Vascular smooth muscle cells microinjected with Y13259 demonstrated a 61 ⁇ 4% decrease in cell entry into S-phase
- Gax Protein Inhibits Vascular Smooth Muscle Cell Proliferation in a Dose-Dependent Manner.
- the cellular growth inhibition by the GST-Gax protein is dose dependent. Little or no growth inhibition was observed when 0.2 mg/ml GST-Gax protein was injected. The maximal growth inhibition was obtained with approximately 0.5 mg/ml of the GST-Gax protein.
- the GST-Gax protein was microinjected into quiescent SV40-transformed vascular smooth muscle cells, BALBc3T3 cells, NIH3T3 cells, human vascular smooth muscle cells, and human fibroblasts.
- the SV40 transformed cell line was derived from rat vascular smooth muscle cells transformed with the SV40 large T antigen. These cells, while immortalized, retain many differentiated characteristics of untransformed vascular smooth muscle cells.
- the cells were microinjected with either 0.6 mg/ml GST-Gax protein or 2 mg/ml GST were then stimulated with 10% fetal calf serum, and labeled for 24 hours with BrdU. The results are shown in Table 3.
- S40-transformed vascular smooth muscle cell proliferation was inhibited by GST-Gax protein, as shown in Table 3.
- the GST-Gax protein also inhibited the proliferation of fibroblast cell lines NIH3T3 and BALB/c human cells, specifically human vascular smooth muscle cells and human foreskin fibroblasts. These results indicate that Gax action is not cell type-specific, although there are differences in the extent inhibition among the different cell types.
- the GST-Gax protein exhibits maximal inhibition in vascular smooth muscle cells, the cell type in which the Gax gene is normally expressed.
- the GST-Gax protein exhibits maximal inhibition in vascular smooth muscle cells, the cell type in which the Gax gene is normally expressed.
- the ras mutant Ras(Leu-61) were compared by microinjecting these proteins into rat vascular smooth muscle cells.
- a solution containing both 0.5 mg/ml GST-Gax protein and 0.5 mg/ml Ras(Leu-61) was microinjected into quiescent vascular smooth muscle cells.
- other vascular smooth muscle cells received either 0.5 mg/ml GST-Gax protein or 0.5 mg/ml Ras(Leu-61) or 0.5 mg/ml GST.
- the injected cells were then incubated for 24 hours with medium containing 10% fetal calf serum and BrdU. The results are shown in FIG. 12.
- Gax Protein Inhibits Cell Growth when Microinjected before the GI to S Boundary
- the time of S phase onset was determined in rat vascular smooth muscle cells.
- the vascular smooth muscle cells were stimulated with 10% fetal calf serum and pulse labeled with 10 mCi/ml 3 H-thymidine for one hour at different times after stimulation.
- Serarate cultures of the cells were microinjected with GST-Gax protein at various times after receiving 10% fetal calf serum and labeled with BrdU between 10 and 24 hours after receiving the fetal calf serum. Percent inhibition of S-phase entry was determined at each time point. The results are shown in FIG. 13.
- S phase onset indicated by the uptake of 3 H-thymidine, occured at approximately 16-18 hours after mitogen stimulation.
- GST-Gax protein significantly inhibited vascular smooth muscle cell entry into the S phase when microinjected at any time from stimulation up until approximately 12 hours.
- GST-Gax protein was ineffective when injected at 15 hours.
- the Gax gene inhibits a critical step in cell cycle progression prior to the G 1 /S boundary; perhaps before the restriction point in G 1 where eukaryotic cells are irreversibly committed to entering the S phase.
- Gax Gene Expression is Rapidly Down Regulated in vivo Upon Acute Blood Vessel Injury
- Gax gene expression in normal blood vessels and in injured blood vessels was compared to determine whether Gax gene down-regulation occurs in response to injury-induced smooth muscle cell proliferation in vivo.
- Adult male Sprague-Dawley rats were subject to acute vessel injury by balloon de-endothelialization in the carotid arteries according to the methods of Majesky, M. W., et al. J. Cell. Biol . (1990) Vol. 111, pp. 2149-2158.
- the expression levels of Gax that is, the mRNA 1 vels, were assessed relative to that of glyceraldehyde 3-phosphate dehydrogenase (hereinafter also referred to as “G3”) by a quantitative polymerase chain reaction.
- G3 glyceraldehyde 3-phosphate dehydrogenase
- the CDNA was synthesized from the extracted RNA with MMLV reverse transcriptase from Bethesda Research Labs. Aliquots of the cDNA pools were subjected to polymerase chain reaction amplification with AmpliTaq DNA polymerase from Perkin-Elmer in.the presence. of ⁇ 32P-dCTP with the following cycle conditions: 94° C. for 20 seconds, 55° C. for 20 seconds, and 72° C. for 20 seconds. The final cycle had an elongation step at 72° C. for 5 minutes.
- the primers for the rat Gax amplification were: 5′-CCCGCGCGGCTTTTACATTAGGAGT-3′ and 5′-GCTGGCAAACATGCCCTCCTCATTG-3′.
- the primers for the rat G3 gene were 5′-TGATGGCATGGACTGTGGTCATGA-3′ and 5′-TGATGGCATGGACTGTGGTCATGA-3′.
- the Gax cDNA was amplified for 30 cycles, and G3 was amplified for 25 cycles in the same reaction vessels. The amount of a radioactive label incorporated into the amplified cDNA and G3 fragments was determined by subjecting the fragments to electrophoresis on a 1% agarose gel, then excising the bands and liquid scintillation counting.
- the ratio of radiolabel incorporation into the Gax-derived amplified bands and the G3-derived amplified bands corrects for differences arising from the efficiency of RNA extraction from the different animals, and it provides a measure of Gax mRNA levels in the normal and injured vascular tissues. These ratios are plotted in FIG. 14.
- the Gax mRNA expression was down-regulated in response to acute vessel injury by as much as a factor of 20. This down-regulation was rapid and appeared complete by 2 hours, the first time-point following the de-endothelialization procedure.
- these data corroborate the Gax gene down-regulation in cultures of vascular smooth muscle cells following growth factor stimulation. Further, these data show that Gax gene expression is an early marker of the cell cycle activity associated with the initiation of vascular restenosis, and they indicate that Gax has a regulatory role following blood vessel injury.
- the present invention includes: the DNA sequences encoding a protein, or portion thereof, which inhibits vascular. smooth muscle cell proliferation; the messenger RNA transcript of such DNA sequence; and an isolated protein which inhibits vascular smooth muscle cell growth.
- the DNA sequences include: DNA molecules which, but for the degeneracy of the genetic code would hybridize to DNA encoding the Gax protein, thus the degenerate DNA which encodes the Gax protein; DNA strands complementary to DNA sequences encoding the Gax protein or portions thereof including DNA in FIGS. 1 and 3 or portions thereof; heterologous DNA having substantial sequence homology to the DNA encoding the Gax protein, including the DNA sequences in FIGS. 1 and 3 or portions thereof.
- the isolated protein includes, for example, portions of the Gax protein; the Gax protein of animals other than rat and human; and proteins or portions thereof having substantially the same amino acid sequence as shown in FIGS. 1 and 3 or portions thereof.
Abstract
A novel growth arrest homeobox gene has been discovered and the nucleotide sequences have been determined in both the rat and the human. The expression of the novel homeobox gene inhibits vascular smooth muscle cell growth. The growth arrest homeobox gene hereinafter referred to as the “Gax gene” and its corresponding proteins are useful in the study of vascular smooth muscle cell proliferation and in the treatment of blood vessel diseases that result from excessive smooth muscle cell proliferation, particularly after balloon angioplasty.
Description
- The leading cause of death in the United States and in most developed. countries, is atherosclerosis. Atherosclerosis is a disease affecting the large and medium size muscular arteries such as the coronary or carotid arteries and the large elastic arteries such as the aorta, iliac, and femoral arteries. This disease causes narrowing and calcification of arteries. The narrowing results from deposits of substances in the blood in combination with proliferating vascular smooth muscle cells.
- The deposits known as atherosclerotic plaques are comprised of lipoproteins, mainly cholesterol, proliferating vascular smooth muscle cells and fibrous tissue, and extra cellular matrix components, which are secreted by vascular smooth muscle cells. As the plaques grow, they narrow the lumen of the vessel decreasing arterial blood flow and weakening the effected arteries. The resulting complications potentially include a complete blockage of the lumen of the artery, with ischemia and necrosis of the organ supplied by the artery, ulceration and thrombus formation with associated embolism, calcification, and aneurysmal dilation. When atherosclerosis causes occlusion of the coronary arteries, it leads to myocardial disfunction, ischemia and infarction and often death. Indeed, 20-25% of deaths in the United States are attributable to atherosclerotic heart disease. Atherosclerosis also leads to lower extremity gangrene, strokes, mesenteric occlusion, ischemic encephalopathy, and renal failure, depending on the specific vasculature involved. Approximately 50% of all deaths in the United States can be attributed to atherosclerosis and its complications.
- Present treatments for atherosclerosis include drugs and surgery, including balloon angioplasty. As a result of angioplasty, vascular smooth muscle cells de-differentiate and proliferate and leading to leading to reocclusion of the vessel. These de-differentiated vascular smooth muscle cells deposit collagen and other matrix substances, that contribute to the narrowing of vessel. Vascular cells secrete growth factors such as platelet derived growth factor, which induces both chemotaxis and proliferation of vascular smooth muscle cells.
- Many of the present drug therapies treat a predisposing condition such as hyperlipidemia, hypertension, and hypercholesterolemia, in an attempt to slow or halt the progression of the disease. Other drug therapies are aimed at preventing platelet aggregation or the coagulation cascade. Unfortunately, the drug treatments do not reverse existing conditions.
- Surgical treatments include coronary artery bypass grafting, balloon angioplasty, or vessel endarterectomy which, when successful, bypass or unblock occluded arteries thereby restoring blood flow through the artery. The surgical treatments do not halt or reverse the progression of the disease because they do not affect smooth muscle cell proliferation and secretion of extra cellular matrix components.
- The bypass surgeries, particularly the coronary bypass surgeries, are major, complicated surgeries which involve a significant degree of risk. The balloon angioplasty, while also a surgical procedure, is less risky. In balloon angioplasty, a catheter having a deflated balloon is inserted into an artery and positioned next to the plaque. The balloon is inflated thereby compressing the plaque against the arterial wall. As a result, the occlusion is decreased and increased blood flow is restored. However, the balloon angioplasty injures the arterial wall. As a result, the underlying vascular smooth muscle cells migrate to the intima, and synthesize and excrete extracellular matrix components eventually leading to the reocclusion of the vessel. Of the estimated 400,000 coronary artery balloon angioplasties performed each year in the United States, 40% fail due to reocclusion requiring a repeat procedure or coronary bypass surgery. Bypass surgeries also have a significant rate of failure due to internal hyperplasia, which involves excessive proliferation of vascular smooth muscle cells at the sites of vascular anastamoses.
- Attempts have been made to prevent reocclusion of vessels after balloon angioplasties in experimental animals. One approach has been to treat rat carotid ateries with antisense oligonucleotides directed against the c-myb gene following balloon angioplasty de-endothelialization. In vascular smooth muscle cells the The expression of the c-myb gene is up-regulated during the G1 to S transition of the cell cycle, and the activation of c-myb expression is required for further cell cycle progression. The antisense oligonucleotides to c-myb blocked smooth muscle cell proliferation following balloon angioplasty. However, the antisense oligonucleotides are applied in a pleuronic gel to the adventitia, that is, the exterior, rather than the lumen side of the affected vessel. Exposing the the exterior of the vessel requires additional surgery with its attendant risks, and is therefore not desirable.
- It would be desirable to have a nonsurgical treatment, used in conjunction with balloon angioplasties to reduce vascular smooth muscle cell proliferation.
- A novel growth arrest homeobox gene has been discovered and the nucleotide sequences have been determined in both the rat and the human. The expression of the novel homeobox gene inhibits vascular smooth muscle cell growth. The growth arrest homeobox gene hereinafter referred to as the “Gax gene” and its corresponding proteins are useful in the study of vascular smooth muscle cell proliferation and in the treatment of blood vessel diseases that result from excessive smooth muscle cell proliferation, particularly after balloon angioplasty.
- FIG. 1 is the nucleotide sequence of rat Gax gene with the predicted amino acid sequence listed below the nucleotide sequence. The homeobox is indicated by a box, and the CAX nucleotide repeat, where X is ether cytosine or guanine, is underlined. A polyadenylation signal is in boldface and italics. Putative consensus sites are indicated as follows: for phosphorylation by protein kinase C, circles; for cyclic AMP (cAMP)-dependent protein kinase, squares; for casein kinase II, diamonds; and for histone H1 kinase, triangles. Residues which could potentially be a target for either cAMP-dependent protein kinase or protein kinase C are both circled and boxed.
- FIG. 2 is the map of
mouse chromosome 12 showing the location of the Gax gene; - FIG. 3 is the nucleotide sequence of human Gax gene with the predicted amino acid sequence listed below the nucleotide sequence;
- FIG. 4 is a map of human Gax gene showing how the separately cloned fragments were joined and oriented in the plasmid, Bluescript IISK+;
- FIG. 5A is a northern blot showing Gax RNA levels in vascular smooth muscle cells in response to 10% fetal calf serum after 4, 24, and 48 hours; lane Q is RNA from quiescent cells; GAPDH is rat glyceraldehyde 3-phosphate dehydrogenase;
- Figure 5B is a northern blot showing Gax RNA levels and Hox 1.3 RNA levels in vascular smooth muscle cells in response to 10 ng/ml human platelet derived growth factor at 0.25, 0.5, 1, 2, and 4 hours, lane Q is RNA from quiescent vascular smooth muscle cells;
- FIG. 6 is a graph of changes in relative Gax mRNA levels in vascular smooth muscle cells in response to 10% fetal calf serum and 10 mg/ml of the PDGF isoforms; the circles represent PDGF-AA, the squares represent PDGF-BB, the diamonds represent fetal calf serum, and the triangles represent PDGF-AB;
- FIG. 7 is a graph showing3H-thymidine uptake in vascular smooth muscle cells at various times after stimulation with fetal calf serum and PDGF isoforms; the circles represent PDGF-AA, the triangles represent PDGF-AB, the squares represent PDGF-BB, the diamonds represent fetal calf serum, and the solid squares represent no mitogen;
- FIG. 8 is a graph showing relative Gax mRNA levels in vascular smooth muscle cells in response to varying doses of PDGF-AB, represented by triangles, and PDGF-BB, represented by squares;
- FIG. 9 is a graph showing relative Gax mRNA levels in vascular smooth muscle cells in response to varying doses of fetal calf serum;
- FIG. 10 is a graph showing relative Gax mRNA levels in vascular smooth muscle cells in response to fetal calf serum withdrawal;
- FIG. 11 is a dose response curve showing % inhibition of growth in vascular smooth muscle cells in response to varying doses of microinjected GST-Gax protein;
- FIG. 12 is a graph showing percent inhibition of mitogen induced DNA synthesis in vascular smooth muscle cells in response to: ras (Leu-61) protein; ras (Leu-61). protein in combination with the GST-Gax protein; GST-Gax protein; and the GST;.
- FIG. 13 is a graph showing percent inhibition vascular smooth muscle cell entry into S phase by microinjected GST-Gax protein over time and the3H-thymidine uptake over the same time period;
- FIG. 14 is a graph showing the ratio of the Gax mRNA to glyceraldehyde-3-phosphate dehydrogenase designated “G3” level from normal vascular tissue and times following acute blood vessel injury.
- A novel gene, the Gax gene, has been discovered, the expression of which inhibits vascular smooth muscle cell growth. The Gax gene and the protein it encodes, referred to herein as the “Gax protein” are useful in the study of vascular smooth muscle cell proliferation and in inhibiting smooth muscle cell proliferation. The inhibition of vascular smooth muscle cell proliferation, particularly by genetic therapy, is also useful in the treatment of vascular diseases associated with excessive smooth muscle cell proliferation.
- Nucleotide sequences, such as the Gax gene or portions therof, or mRNA are administered to the vascular cells, preferably during a balloon angioplasty procedure, to inhibit the proliferation of vascular smooth muscle cells. The nucleotide sequences are delivered, preferably to the interior of the vessel wall during balloon angioplasty procedure preferably by a perforated balloon catheter. Genes are transfered from vectors into vascular smooth muscle cells in vivo where the genes are expressed. Suitable vectors and procedures for the transfer of nucleotides are found in Nabel, E. G., et al. “Site-Specific Gene Expression in Vivo by Direct Gene Transfer into the Arterial Wall” (1990)Science Vol. 249, pp. 1285-1288, which is incorporated herein by reference. Specialized perforated balloon catheters which deliver nucleotide sequences to vessel walls employing viral and non-viral vectors are used for delivery of nucleotide sequences and a description of the catheter's structure and use may be found in Flugelman M. Y., et al. “Low Level In Vivo Gene Transfer Into the Arterial Wall Through a Perforated Balloon Catheter” Circulation, Vol. 85, No. 3, pp. 1110-1117 (March 1992) which is incorporated herein by reference.
- Genetic therapy, preferably by the over expression of the Gax gene, restores the proliferating vascular smooth muscle cells to a more normal phenotype, thus preventing or reducing the smooth muscle proliferation that is associated with the formation of the atheromatous plaque and with internal arterial thickening following balloon angioplasty. In addition to preventing or reducing the reocclusion of the vessel, such genetic therapy decreases the risks associated with additional surgeries. Also, the Gax proteins or portions thereof, are administered to vascular cells preferably employing the perforated catheter, to inhibit the proliferation of vascular smooth muscle cells.
- The molecular control of cellular proliferation is not well understood. A class of genes, known as Homeobox genes, encode a class of transcription factors which are important in embryogenesis, tissue specific gene expression and cell differentiation. The homeobox genes share a highly conserved 183 nucletide sequence that is referred to as the “homeobox”. The homeobox encodes a 61 amino acid helix-turn-helix motif that binds to adenine and thymine rich gene regulatory sequences with high affinity. Several vertebrate homeobox proteins have been shown to be transcription factors required for expression of lineage-specific genes. The tissue-specific transcription factors bind to DNA and repress or induce groups of subordinate genes. Many, but not all of these homeobox genes are located in one of four major clusters known as Hox clusters, designated Hox-1, Hox-2, Hox-3 and Hox-4. The Hox genes are expressed in the developing embryo, in distinct overlapping spatial patterns along the anterior-posterior axis which parallels the Hox gene order along the chromosome. Homeobox transcription factors control axial patterning, cell migration and differentiation in the developing embryo and are involved in the maintenance of tissue specific gene expression in adult organisms.
- A new homebox gene has been discovered, isolated and sequenced in both the rat and human. This new gene is a growth arrest specific homeobox gene and is referred to herein as the “Gax gene”. The expression of the Gax gene is restricted to the cardiovascular system, and in particular, to vascular smooth muscle cells where it functions as a negative regulator of cell proliferation.
- Isolation of the Rat Gax cDNA
- An adult rat aorta cDNA library in λ ZAP, from Stratagene, was screened with a 64-fold degenerate 29-mer oligonucleotide containing three inosine residues directed at the most highly conserved region of the antennapedia homeodomain (helix 3), with the following sequence, where I represents inosine:
- 5′-AA(A/G)ATITGGTT(T/C)CA(A/G)AA(C/T)(A/C)GI(A/C) GIATGAA-3′.
- Recombinant phage colonies inEscherichia coli were adsorbed in duplicate to nitrocellulose membranes and hybridized at 42° C. with this oligonucleotide end labeled with (γ-32P)ATP in a mixture containing 0.5 M sodium phosphate at pH 7.0, 7% sodium dodecyl sulfate, 1 mM EDTA, and 1% bovine serum albumin. The filters were washed with a final stringency of 0.5×SSC (1×SSC in 150 mM NaCl with 15 mM sodium citrate at pH 7.0)−0.1% sodium dodecyl sulfate at 42° C. and exposed to X-ray film. Thirteen positive signals were isolated and rescreened until the clones were plaque purified. The plasmids containing the clones in λ ZAP vector were then excised by the protocol recommended by the manufacturer and sequenced on both strands with sequenase version 2.0 from United States Biochemicals. From 500,000 plaques, 13 positive clones were isolated, 12 of which contained homeodomains. Nine of the isolated clones were derived from previously described homeobox genes: Hox-1.3, Hox-1.4, Hox-1.11, and rat homeobox R1b. However, three clones represented the cDNA designated herein as the “Gax” gene. Homology searches were performed via the GenBank and EMBL data bases, version 73, by using the BLAST algorithm (4).
- Nucleotide Sequence of the Rat Gax Gene
- The nucleotide sequence of the rat Gax gene is shown in FIG. 1. The cDNA encoding Gax is 2,244 base pairs in length, which corresponds to the size of the Gax transcript, that is the Gax mRNA, which is about 2.3 to 2.4 kb as determined by Northern blot analysis. The Gax cDNA has an open reading frame from nucleotide residues 197 to 1108 beginning with an in-frame methionine that conforms to the eukaryotic consensus sequence for the start of translation and is preceded by multiple stop codons in all three reading frames. The open reading frame of the cDNA predicts a 33.6-kDa protein containing 303 amino acids with a homeodomain from amino acid residues 185 to 245, as shown in FIG. 1. To confirm that this cDNA was capable of producing a protein product, the Gax open reading frame was fused in frame to the pQE-9E. coli expression vector, from Qiagen, Inc., Chatsworth, Calif. and expressed in bacteria according to Hochuli, E., et. al. (1988) “Genetic Approach to Facilitate Purification of Recombinant Proteins with a Novel Metal Chelate Adsorbent” Bio/Technology Vol. 6, pp. 1321-1325. E. coli containing this plasmid expressed a new phosphorylated protein of about 30 to about 36 kDa as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and extracts from these E. coli cells displayed a weak binding activity for the adenine and thymine rich, MHox-binding site in the creatine kinase M enhancer.
- The cDNA encoding the rat Gax gene also contains a long 3′-untranslated region, from bases 1109 to 2244, with a polyadenylation signal at base 2237, as shown in FIG. 1. The region between amino acids 87 and 184 contains 23 serine amino acids out of 88 amino acids and 10 proline amino acids out of 88 amino acids and contains several consensus sequences for phosphorylation by protein kinases. Gax also possesses a structural feature which is also found in several transcription factors, including homeodomain proteins, known as the CAX or Opa transcribed repeat. The Opa transcribed repeat encodes a stretch of glutamines and histidines; in the rat Gax gene it encodes 18 residues, of which 12 are consecutive histidines. This motif is shared by other transcription factors, such as the zinc finger gene YY-1, as well as by several homeobox genes, including H2.0, HB24, ERA-1 (Hox-1.6), Dual bar, and Tes-1. The Gax protein may require post-translational modifications for full activity, modifications that bacterially produced proteins do not undergo. Since the Gax protein has multiple consensus sites for phosphorylation by protein kinases, it is possible that its activity is activated or otherwise modulated by phosphorylation at one or more of those sites.
- The Gax Gene Maps to a
Chromosome 12 of the Mouse Genome - Gax is located on
chromosome 12 as shown in FIG. 2 of the mouse and is not a part of the Hox-1, Hox-2, Hox-3, or Hox-4 gene clusters, which are located onchromosomes chromosome 12 with a composite mouse linkage map that reports the map location of many uncloned mouse mutations using GBASE, a computerized data base maintained at The Jackson Laboratory, Bar Harbor, Me. The Gax gene mapped in a region of the composite map that lacks mouse mutations with a phenotype that might be expected for an alteration in this locus. - The mouse chromosomal location of the Gax was determined by interspecific backcross analysis using progeny generated by mating (C57BL/6J x Mus spretus)F1 females and C57BL/6J males. The C57BL/6J and M. spretus DNAs were digested with several enzymes and analyzed by Southern blot hybridization for informative restriction fragment length polymorphisms with a rat cDNA Gax probe. The probe, a 1,155-bp rat cDNA clone, was labeled with (α-32p)dCTP by using a random prime labeling kit from Amersham and washing was done with a final stringency of 0.2×SSCP (34)−0.1% sodium dodecyl sulfate, 65° C. A major fragment of 4.2 kb was detected in HincII-digested C57BL/6J DNA, and major fragments of 3.6 and 2.7 kb were detected in HincII-digested M. spretus DNA. The 3.6-kb and 2.7-kb M. spretus HincII restriction fragment length polymorphisms were used to monitor the segregation of the Gax locus in backcross mice. Recombination distances were calculated by using the computer program SPRETUS MADNESS. Gene order was determined by minimizing the number of recombination events required to explain the allele distribution patterns.
- The mapping results indicated that the mouse Gax gene is located in the proximal region of
mouse chromosome 12 linked to neuroblastoma myc-related. oncogene 1 (Nmyc-1), the laminin B1 subunit gene (Lamb-1), a DNA segment,chromosome 12, theNyu 1 gene (D12Nyu1), and the β-spectrin gene (Spnb-1). The ratios of the total number of mice exhibiting recombinant chromosomes to the total number of mice analyzed for each pair of loci and the most likely gene order are as follows: centromere-Nmyc-1-19/193-Lamb-1-9/166-Gax-10/166-D12Nyu1-19/185-Spnb-1. The recombination frequencies, expressed as genetic distances in centimorgans ± the standard error, are as follows: Nmyc-1-9.8±2.2-Lamb-1-5.4±1.8-Gax-6.0±1.9-D12Nyul-10.3±2.2-Spnb-1. - Gax Gene Expression in Rat Tissue
- It has been discovered that the Gax transcript is largely confined to the cardiovascular system, including the descending thoracic aorta, where it is expressed at higher levels than in other tissues, and the heart. Gax gene expression was also detected in the adult lung and kidney where it is found in mesangial cells. No Gax gene expression was detected in the brain, liver, skeletal muscle, spleen, stomach, or testes, nor was expression detected in the intestine or pancreas. In contrast, the Gax gene was more widely expressed in the developing embryo, with the transcript detectable in the developing cardiovascular system, multiple mesodermal tissues, and some ectodermal tissues.
- The 2.3-kb to 2.4-kb Gax RNA transcript was detected in smooth muscle cells cultured from adult rat aorta, consistent with the in situ hybridization findings and the fact that Gax was originally isolated from a vascular smooth muscle library. The Gax transcript was also detected in rat vascular smooth muscle cells transformed by
simian virus 40. However, no Gax gene expression was detected in either of two cell lines derived from embryonic rat aortic smooth muscle, A7r5 and A10. The Gax transcript was also not detected in NIH 3T3 fibroblasts, or human foreskin fibroblasts. The Gax transcript was not detected in the skeletal muscle cell line C2C12. A relatively high level of Gax gene expression was detected in cultured rat mesangial cells. Mesangial cells share many similarities to vascular smooth muscle cells, both structurally and functionally, and proliferate abnormally in renal diseases such as glomerulonephritis and glomerulosclerosis. - Isolation of the Human Gax cDNA
- The nucleotide sequence of the human Gax gene coding sequence is shown in FIG. 3. Approximately 1×106 plaques from a human genomic library in λFixII available from Stratagene were screened by conventional methods with a random primed EcoRI/BstXI fragment encompassing nucleotides 485-1151 of the rat Gax cDNA. Two clones contained the second exon of human Gax gene, having 182 base pairs. Using this coding information, the rest of the coding region was cloned by polymerase chain reaction methods.
- Reverse transcriptase and polymerase chain reaction techniques were used to clone the 3′ end of the human cDNA. The template was whole human RNA isolated from human internal mammary artery isolated by TRI reagent from Molecular Research Center, Inc. The following reagent concentrations were used in the reverse transcriptase reaction: 1 μg of total internal mammary artery RNA; 50 mM Tris-HCl pH 8.5; 30 mM KCl; 8 mM MgCl2; 1 mM DTT; 20 units RNAsin from Boehringer Mannheim; 1 mM each of DATP, dTTP, dGTP, and dCTP; 0.5 μg random hexamers from Boehringer Mannheim; and 40 u of AMV reverse transcriptase from Boehringer Mannheim, in a total volume of 20 μL. This was incubated for 1 hour at 42° C., heat inactivated, and then stored at −80° C. before use. An initial amplification of 10% of the reverse transcriptase reaction was performed with just the sense oligonucleotide primer, known as “H2” and Ampliwax
™ PCR Gem 100 beads Perkin Elmer in a “hot start” procedure according to the directions of the manufacturer. The following reagent concentrations were used: 50 mM KCL; 10 mM Tris-HCl at pH 8.3; 1.5 mM MgCl2; 1 mg/mL gelatin; 0.2 mM each of DATP, dTTP, dGTP, and dCTP; 0.1 μM primer(s); and 2.5 units of Taq polymerase from Boehringer Mannheim or Perkin Elmer in a volume of 100μL (these conditions were used thereafter unless noted). The cycling protocol was as follows: 94° C. for two minutes, then 30 cycles of 94° C. for 30 seconds, 45° C. for 1 minute, and 72° C. for 1 minute. A second amplification was then performed on 10% of the primary reaction products using the H2 primer and a degenerate antisense oligonucleotide primer known as “P2B” against the carboxy terminal peptide. The cycling parameters were: 94° C. for two minutes followed by 30 cycles of 94° C. for 30 seconds, 40° C. for 30 seconds, 50° C. for 1 minute and 72° C. for 1 minute. A product was observed of the correct size and following purification by Glass Fog from Bio101, on 2% Biogel agarose from Bio101 was blunt sub-cloned into EcoRV digested BluescriptII SK+ vectors from Stratagene and sequenced to high resolution by Sequenase 2.0 from universal primers from United States Biochemical. Five individual clones were sequenced to eliminate any spurious Taq polymerase errors. - The 5′ end of the human coding region was amplified using an anchored polymerase chain reaction kit, available under the tradename “5′-Amplifinder RACE” from Clonetech according to the manufacturer's instructions. This method uses single stranded RNA ligase to ligate an anchor oligonucleotide onto the 3′ end of appropriately primed first strand cDNA. Templates used were either human heart polyA+ RNA obtained from Clonetech or polyA+ RNA isolated from primary cultures of human vascular smooth muscle cells obtained from Clonetics. The polyA+ RNA from cultured vascular smooth muscle cells was purified with RNAzol B from Biotecx using batch chromatography on Oligo-dT latex beads from Qiagen. Both templates yielded amplified cDNAs and specific subclones were chosen solely by size. First strand RNA templates were prepared by either specific priming or priming with random hexamers from Boehringer Mannheim. In general, the specific primed templates yielded longer clones but could not be used for multiple step wise amplification of the rest of the coding region.
- Amplification from anchored templates using the sense anchor primer and appropriate antisense specific primers was accomplished using ampliwax beads from Perkin Elmer and “hot start” polymerase chain reaction using the same reaction conditions as above, but with 0.2 μM primers in a total volume of 50 μL. The cycling protocol was as follows: 94° C. for 2 minutes then 30 cycles of 94° C. 45 seconds, 60° C. 45 second, and 72° C. for 1.5 minutes, followed by a final extension of 72° C. for 10 minutes. Following a primary amplification, aliquots (10-20%) of the reactions were run out on 2% Biogel agarose from Bio101 and size selected. After purification by glass fog from Bio101, 1-10% of the elutes were reamplified (2°), usually with a nested primer. Products were observed at this point and purified by glass fog as before and sequenced directly using a thermal cycling kit from New England Biolabs. Once the products were confirmed they were sub-cloned as described above. Between 5 to 8 individual clones from each of three sequential amplifications were sequenced to eliminate spurious Taq polymerase errors and appropriate clones chosen for the finished molecule. A summary of the primer pairs sense/antisense used to amplify the complete coding region follows:
position Clone # Source of Template 1° 2° 5′-3′ 6 dN6 primed IMA whole RNA H2 H2/P2B 699-941 23 H2R primed Heart AP/H2R AP/H3 231-698 polyA + RNA 117 dN6 primed VSMC AP/H6 AP/H6 119-230 poly A + RNA 131 dN6 primed VSMC AP/H6 AP/H7 1-118 poly A + RNA - Clones were pieced together 3′-5′ as follows:
fragments fragment 117 has. a native NcoI site which is compatible with an engineered BspHI site infragment 131. Both engineered sites have a single base change in the wobble base of leucine codons, as noted on the final sequence as shown in FIG. 3. Once assembled the molecule was excised by digestion with EcoRI and HindIII. The map in FIG. 4 shows the molecule and its orientation.TABLE 1 Primers Used to Amplify Human Gax gene Primer Sequence 5′-3′ P2B TCA, IA(G/A), (G/A)TG, IGC, (G/A)TG, (T/C)T C H2 GCGCGC(AGATCT)CAC, TGA, AAG, ACA, GGT, AAA H2R TT, TAC, CTG, TCT, TTC, AGT, GAG H3 GCGCGC (AGATCT)AG, ATT, CAC, TGC, TAT, CTC, GTA R6 GCGCGTGCCCCCTCTGATG, CTG, GCT, GGC, AAA, CAT, GT H7 GCGCGC(TCTTGA)AGG, GCG, AGA, GAG, GAT, TGG, GA AP CTGGTTCGGCCCACCTCTGAAGGTTCCAGAATCGATAG Anchor GGAGACTTCCAAGGTCTTAGCTATCA(CTTAAG)CAC - The Gax Gene Maps to a Novel Locus on
Chromosome 7 in the Human Genome - To determine the map location of Gax in the human genome, a 16.5 kilobase pair fragment of the human genomic Gax gene in λFix II from Stratagene was purified with a Qiagen purification column according to the directions of the manufacturer, and it was labeled with biotin 11-dUTP by nick translation. Metaphase spreads of normal human lymphocytes were prepared according to the methods of Fan, Y.,Proc. Natl. Acad. Sci. (USA) Vol. 87, pp. 6223-6227 (1990). Fluorescence in situ hybridization and immunofluorescence detection were performed according to the methods of Pinkel, D., et. al., Proc. Natl. Acad. Sci. (USA) Vol. :83, pp. 2934-2938 (1986) and Testa, J.. R., et al. Cytogenet. Cell. Genet. Vol. 60, pp. 247-249 (1992). Chromosome preparations were stained with diamidino-2-phenylindole and propidium iodide according to Fan, Y. S., et. al., Proc. Natl. Acad. Sci. (USA) Vol. 87, pp.6223-6227 (1990).
- Forty metaphase spreads were examined with a Zeiss Axiophot fluorescence microscope, and fluorescent signals were detected on the short arm of
chromosome 7 in 34 of these spreads. All signals were located at p15-->p22, with approximately 70% of the signals at 7p21. Based on these data, Gax is the only homeoprotein known to map to this locus. - Gax Gene Expression is Down-regulated in Cultured Vascular Smooth Muscle Cells upon Mitogen Stimulation
- It has been found that the Gax gene is expressed in quiescent vascular smooth muscle cells. Since platelet derived growth factor hereinafter also referred to as “PDGF” and other growth factors regulate vascular smooth muscle proliferation and differentiation, differences in Gax gene expression in response to PDGF and other mitogens such as fetal calf serum were examined in cultured vascular myocytes.
- Cultures of rat smooth muscle cells were obtained from the media of aortas isolated from adult male Sprague-Dawley rats. Cells were seeded onto dishes in medium containing a 1:1 mixture of Dulbecco's modified Eagle's medium and Ham's F12 and supplemented with 10% newborn calf serum. Once established, the cells were maintained at 37° C. in a humidified atmosphere of 5% carbon dioxide, and subcultured within three days after reaching confluence. Vascular smooth muscle cells were labeled with monoclonal antibodies to smooth muscle α-actin from Sigma Chemical Co. to verify identity.
- The cultured cells were exposed to various mitogens as discussed-below. The cells were then harvested and the total mRNA was extracted. The total RNA from rat cultured cells was prepared by the guanidine thiocyanate method according to Chomcynzski, P., and N. Sacchi, (1987) “Single-step Method of RNA Isolation by Acid Guanidinium Thiocyanate-phenol-chloroform Extraction”Anal. Biochem. Vol. 162, pp. 156-159, fractionated on 1.2% agarose gels containing formaldehyde, and blotted onto nylon membranes. The RNA from cultured cells was separated on 30-cm gels for transcript size determination and on 10-cm gels for other studies. Hybridizations were carried out at 65° C. in buffer containing 0.5 M sodium phosphate at pH 7.0, 7% sodium dodecyl sulfate, 1 mM EDTA, and 1% bovine serum albumin, using a cDNA probe labeled by random priming consisting of a truncated Gax CDNA lacking the 5′ end and the CAX repeat, where the X may be cytosine or guanine. Probes for Hox-1.3 and Hox-1.4 consisted of the cDNAs isolated from the rat aorta library, and the probe for Hox-1.11 consisted of the DraI-EcoRI fragment of its cDNA. The blots were washed with a final stringency. of 0.1 to 0.2×SSC−0.1% sodium dodecylsulfate at 65° C. After the probings with the homeobox probes were complete, the blots were rehybridized with a probe to rat glyceraldehyde 3-phosphate dehydrogenase hereinafter also referred to as “GAPDH,” to demonstrate message integrity. Gax mRNA and GAPDH mRNA were quantified with a Molecular Dynamics model 400S PhosphorImager to integrate bank intensities, or by scanning densitometry of autoradiograms. In all quantitative comparisons of Gax mRNA levels between experimental groups, Gax mRNA levels were normalized to the corresponding GAPDH level determined on the same blot, to account for differences in RNA loading.
- Time Course of GAX Down-regulation in Cultured Vascular Smooth Muscle Cells
- Rat vascular smooth muscle cells, grown to a greater than about 90% confluence, were placed in low-serum medium containing 0.5% calf serum for 3 days, to induce quiescence. At this time, the medium was removed from the cells and replaced with fresh medium containing either 10% fetal calf serum or 10 ng/ml platelet derived growth factor from human platelets. The cells were then incubated for the various times in the presence of either the fetal calf serum or the PDGF. As a control, quiescent cells were incubated with fresh serum-free medium alone. The cells exposed to PDGF were harvested at 0.25, 0.5, 1, 2, and 4 hours, and the cellular RNA isolated. The cells exposed to human fetal calf serum were harvested at 4, 24, and 48 hours. The Gax and the Hox -mRNA levels were determined by Northern blot analysis. Typical results are shown in FIGS. 5A and 5B.
- A rapid down-regulation, that is a reduction in the amount of Gax mRNA, occurred in the vascular smooth muscle cells when they were stimulated with either fetal calf serum or PDGF as shown in FIGS. 5A and 5B. The down-regulation ranged from 5- to nearly 20-fold, depending on the mitogen used and the experiment. The down-regulation typically occurred within 2 hours after stimulation with fetal calf serum or PDGF, and was maximal at 4 hours. Gax mRNA transcript levels began to recover significantly by approximately 24 hours and approached baseline between 24 and 48 hours after stimulation. The rate of recovery varied with the magnitude of the initial down-regulation and the individual cell culture preparations. While PDGF isolated from human platelets caused a rapid down-regulation of Gax, it had little or no effect on Hox-1.3 mRNA levels. Neither fetal calf serum nor any of the three isoforms of PDGF showed any effect on the transcript levels of Hox-1.3, Hox-1.4, or Hox-1.11, homeobox genes which were also isolated from the vascular smooth muscle library.
- Magnitude of Gax Down-regulation Correlates with Potency of Mitogen
- PDGF is a homodimer or heterodimer made of various combination of two chains, A and B. Thus, there are three isoforms of PDGF; PDGF-AA; PDGF-AB; and PDGF-BB; and they have differing potencies for stimulating DNA synthesis in rat vascular smooth muscle cells. The PDGF-AA, PDGF-AB and PDGF-BB were compared for their effect on Gax expression. Quiescent rat vascular smooth muscle cell received 10 ng/ml of either PDGF-AA, PDGF-AB, PDGF-BB, or 10% fetal calf serum. After 0, 1, 2, 4 and 8 hours the cells were harvested and the Gax mRNA level determined. The results are shown in FIG. 6.
- As shown in FIG. 6, PDGF-AA did not down-regulate Gax gene expression in vascular smooth muscle cells, whereas the PDGF-AB. and PDGF-BB isoforms, and the fetal calf serum reduced Gax gene expression approximately 10-fold by 4 hours. The greatest down-regulation occurred with the fetal calf serum followed by that with PDGF-BB and PDGF-AB.
- To determine whether the extent of Gax gene down-regulation correlated with the potency of the mitogen used to stimulate the vascular smooth muscle cells, the ability of the three PDGF isoforms and fetal calf serum to stimulate DNA synthesis was measured by3H-thymidine uptake. Quiescent vascular smooth muscle cells were stimulated with one of the three PDGF isoforms, at 10 mg/ml, or 10% fetal calf serum. Then 5 μCi/ml 3H-thymidine was added to the cultures for 1 hour at various time points as shown in FIG. 7. The cells were harvested and the 3H-thymidine uptake.was.measured. The results are shown in FIG. 7.
- The PDGF-AA at 10 ng/ml, which was ineffective in causing Gax gene down-regulation, only weakly stimulated DNA synthesis as shown in FIG. 7. PDGF-AB and PDGF-BB both stimulated cell proliferation as measured by3H-thymidine uptake at 15 hours. However, the fetal calf serum which was most effective at down regulating Gax gene expression, was also the most effective mitogen, that is it demonstrated the greatest 3H-thymidine uptake.
- Down-regulation of the Gax Gene is Dependent on the Dose of the Mitogen
- Dose-response experiments were conducted by stimulating quiescent vascular smooth muscle cells with either PDGF-AB, PDGF-BB or fetal calf serum at varying doses as shown in FIGS. 8 and 9. The effects on Gax mNA levels were measured at 4 hours after mitogen stimulation. The results are shown in FIGS. 8 and 9.
- As shown in FIG. 8, the dose response curves reveal that the 50% effective dose for Gax gene down-
regulation 4 hours after PDGF-AB stimulation is between 4 and 8 ng/ml. The 50% effective dose for Gax gene downregulation 4 hours after PDGF-BB stimulation is between 2 and 5 ng/ml. The 50% effective dose for Gax downregulation 4 hours after fetal calf serum is approximately 1%, as shown in FIG. 9. Furthermore, 10% fetal calf serum suppresses Gax mRNA levels nearly 20-fold at 4 hours, an effect larger than that of a maximal stimulatory dose of PDGF-BB (30 ng/ml), which has a 10-fold effect, or of PDGF-AB, which has a less than 8-fold effect, as shown in FIG. 6. Thus, the down-regulation of Gax gene induced by either fetal calf serum or the different isoforms of PDGF correlates well with their abilities to stimulate DNA synthesis as measured by 3H-thymidine uptake. - The Gax gene down-regulation is sensitive to low levels of mitogen stimulation, which cause a significant decrease in Gax mRNA levels. As shown in FIG. 9, stimulation of quiescent rat vascular smooth muscle cells with 1% fetal calf serum caused a 40% decrease in Gax mRNA levels after 4 hours. However, such stimulation increased3H-thymidine uptake less than two-fold over that observed in quiescent vascular smooth muscle cells (data not shown). Treatment with PDGF-BB at doses as low as 2 ng/ml, also caused a detectable decrease in the Gax mRNA level.
- Gax Expression is Up-regulated or Induced when Synchronously Growing Cells are Deprived of Serum
- Sparsely plated vascular smooth muscle cells were grown in a medium containing 20% fetal calf serum, and then placed into serum free medium. The RNA was harvested at various times from 0 to 25 hours. The total mRNA was extracted and subjected to Northern Blot Analysis, then the mRNA transcript of Gax.was quantified.
- As shown in FIG. 10, the expression of the Gax gene was induced fivefold in vascular smooth muscle cells within 24 hours after the rapidly growing cells were placed in the serum-free medium. Thus, expression of Gax gene is regulated by the growth state of the cell, and its downregulation is a prominent feature of the G0/G1 transition in these cells.
- Gax Protein Inhibits Mitogen-Induced S Phase Entry in Vascular Smooth Muscle Cells
- Production of Recombinant Proteins
- To determine whether Gax gene exerts a negative control on cell growth in vascular smooth muscle cells, Gax gene was expressed as a glutathione S-transferase (hereinafter also referred to as “GST”) fusion protein in bacteria and microinjected it into quiescent vascular smooth muscle cells. To determine the effect of the Gax protein on serum-induced cell proliferation, the effect of GST-Gax protein was compared to the effect of known protein regulators of cell growth.
- To produce the Gax protein evaluated herein, the CDNA coding regions for Gax was fused in frame to the pGEX-2T expression vector obtained from Pharmacia Biotechnology, and then expressed inE. coli. Specifically, GST-Gax was produced according to the following procedure: the coding region of Gax cDNA spanning from nucleotides 200-1108 was amplified by polymerase chain reaction methods using the following primers:
5′ GCGCGCGTCGACGAACACCCCCTCTTTGGC 3′ and5′ GCGCGCAAGCTTTCATAAGTGTGCGTGCTC 3′ - The resulting DNA was digested with SalI and HindIII restriction enzymes and cloned into SalI and HindIII sites in the polylinker of pGEM3-lT in vitro transcription translation vector described in Patel R.C. and Sen G.C. (1992) “Identification of the Double-stranded RNA-binding Domain in the Human Interferon-inducible Protein Kinase,”J. Biol. Chem. Vol. 267; pp. 7671-7676. The BamHI to NaeI fragment of pGEM3-lT containing the Gax coding region was then sub-cloned into the same sites of pGEX-2T. The pGEX-2T vector with the YY1 cDNA, used to produce GST-YY1, was from Thomas Shenk at Princeton University.
- The resultant glutathione S-transferase fusion proteins were purified by affinity chromatography on glutathione-agarose beads.E. coli XL1-blue cells were then transformed with the appropriate plasmid and were grown to a density of 0.6-0.8 A600 and induced with 0.5 mM isopropyl-B-D-thiogalectopyrenoside for 2 hours. The cells were harvested and lysed by ultrasonic vibration in phosphate buffered saline containing 1% triton x-100, lmM PMSF and 5 μg/ml aprotinin. The lysate was centrifuged at 15,000×g and the supernatant was collected. The supernatant was bound to the glutathione sepharbse from Pharmacia (0.5 ml of resin per 100ml of bacterial culture) for 2 hours on a rotator at 25 rpm. The slurry was pelleted by centrifugation at 1000×g for 2 minutes, then washed twice with complete lysis buffer then washed twice with lysis buffer lacking triton x-100. The bound protein was eluated for 30 minutes with phosphate buffered saline containing 10 mM reduced glutathione, from Sigma Chemical Company, 40 mM DTT and 150 mM NaCI. Purity of the GST-Gax protein was greater than 90% as determined by SDS-PAGE gels stained with Coomassie blue.
- To produce recombinant MHox, its cDNA was fused. in frame to the pQE-9E. coli expression vector obtained from Qiagen, Inc., Chatsworth, Calif., then expressed in bacteria, and purified by adsorption to a nickel column.
- For microinjection, proteins were concentrated in a buffer containing of 20 mM Tris, 40 mM KC1, 0.1 mM EDTA, 1 mM β-mercaptoethanol, and 2% glycerol using Centricon-30 from Amicon microconcentrators. Concentrated proteins were stored in this buffer in aliquots at −80° C.
- Microinjection and Cell Culture Methods
- Microinjections were performed using a semiautomatic microinjection system from Eppendorf Inc. in conjunction with a Nikon Diaphot phase contrast microscope. According to Peperkole, R., et al. (1988)Proc. Natl. Acad. Sci. USA Vol. 85, pp. 6758-6752, The injection pressure was set at. 70-200 hPa and the injection time was 0.3 to 0.6 seconds.
- After injection, cells were stimulated 24 hours with medium containing 10% fetal calf serum, and the incorporation of 5′-bromo-2′-deoxyuridine, hereinafter also referred to as “BrdU” was measured with a cell proliferation kit according to the directions of its manufacturer, Amersham. When fetal calf serum-stimulated BrdU labeling was determined, BrdU was included for 24 hours with the medium used to stimulate the cells. Where the ability of microinjected proteins to stimulate growth in serum-poor medium was measured, cells were incubated 24 hours in the same low serum medium used to induce quiescence, but supplemented with BrdU. After labeling, the cells were fixed with acid-ethanol, and the percentage of nuclei positive for BrdU uptake was determined for protein-injected and buffer-injected cells. The percent of cell growth inhibition was calculated according to the following formula:
- where IL represents the number of injected labeling positive for BrdU; IT, the total number of injected cells; CL the number of control-injected cells labeling with BrdU; CT, the total number of control-injected cells counted. With this equation, inhibition of mitogen-induced entry into S phase is represented by a positive number and stimulation of cell growth is represented by a negative number.
- Evaluation of Gax Protein
- To determine if the Gax protein inhibits the entry of mitogen stimulated vascular smooth muscle cells into S-phase, the effect of the Gax protein was compared to proteins known to effect cell proliferation, and to control proteins. Such comparison proteins include a neutralizing antibody against ras, “Y13-259, ” which is highly effective in blocking S phase entry when microinjected into NIH3T3 cells; the transcription factor MHox, a homeodomain protein unlikely to have an inhibitory effect on cell proliferation; and YY1, a zinc finger transcription factor unlikely to have a negative effect on cell growth.
- Quiescent rat vascular smooth muscle cells were microinjected with either. 0.6 mg/ml GST-Gax protein; 1.6 mg/ml MHox; 1.2 mg/ml YY1; 8 mg/ml Y13-259; 2mg/ml GST alone; or 8 mg/ml mouse anti-human IgG. The cells were then stimulated for 24 hours with 10% fetal calf serum in medium containing BrdU. After 24 hours, the fraction of nuclei labeling with BrdU was determined and percentage inhibition of S-phase entry calculated. The results are summarized in Table 2.
TABLE 2 Effect of Microinjected Proteins on the Serum-induced Proliferation of Vascular Smooth Muscle Cells Mean % Inhibition of Total Number FCS-stimulated Number of of Cells Growth ± Standard Treatment Experiments Examined Error Antibody Y13-259 2 328 60.8 ± 3.9 Mouse anti-human 3 330 −3.4 ± 4.5 IgG GST- Gax 15 2943 42.7 ± 3.3 MHox 2 236 −5.3 ± 9.3 GST- YY1 5 306 0.0 ± 12.2 GST 7 1144 −2.6 ± 2.1 - As shown in Table 2, the GST-Gax protein inhibited vascular smooth muscle cell entry into S-phase by 42.7%. The GST Gax protein effect on mitogen-stimulated entry into S phase is specific. The other injected proteins GST, YY1, MHox and the mouse anti-human IgG failed to inhibit vascular smooth muscle cell growth. In comparison to the GST-Gax protein, the antibody Y13-259, as anticipated, significantly decreased mitogen-induced cell proliferation. Vascular smooth muscle cells microinjected with Y13259 demonstrated a 61±4% decrease in cell entry into S-phase
- Gax Protein Inhibits Vascular Smooth Muscle Cell Proliferation in a Dose-Dependent Manner.
- To determine the concentration of microinjected GST-Gax required to inhibit vascular smooth muscle cell growth, solutions containing different concentrations of GST-Gax protein were microinjected into quiescent vascular smooth muscle cell and the effects on mitogen-stimulated entry into S phase examined. Specifically, vascular smooth muscle cells were rendered quiescent by incubation in medium containing 0.5% calf serum for three days. The cells were microinjected with varying concentrations of GST-Gax, and stimulated with 10% fetal calf serum, and labeled with BrdU. After 24 hours, the percentage inhibition of cell proliferation was determined. Each data point represents the mean ± standard error of 3-5 experiments in which 100-200 cells per experimental group were injected.
- As shown in FIG. 11, the cellular growth inhibition by the GST-Gax protein is dose dependent. Little or no growth inhibition was observed when 0.2 mg/ml GST-Gax protein was injected. The maximal growth inhibition was obtained with approximately 0.5 mg/ml of the GST-Gax protein.
- Gax Inhibits Proliferation of Several Cell Types
- To determine whether the GST-Gax protein inhibits growth in other cells types, the GST-Gax protein was microinjected into quiescent SV40-transformed vascular smooth muscle cells, BALBc3T3 cells, NIH3T3 cells, human vascular smooth muscle cells, and human fibroblasts. The SV40 transformed cell line was derived from rat vascular smooth muscle cells transformed with the SV40 large T antigen. These cells, while immortalized, retain many differentiated characteristics of untransformed vascular smooth muscle cells. The cells were microinjected with either 0.6 mg/ml GST-Gax protein or 2 mg/ml GST were then stimulated with 10% fetal calf serum, and labeled for 24 hours with BrdU. The results are shown in Table 3.
TABLE 3 EFFECT OF MICROINJECTED GST-GAX PROTEIN ON CELL PROLIFERATION IN DIFFERENT CELL TYPES Mean & Range Number Number Inhibition Mitotic of of Cells of FCS- Index in GST-GAX Experi- Exam- Stimulated Response Cell type protein ments ined Growth to FCS SV40- Yes 4 448 27.2 ± 2.0 — transformed VSMC SV40- No N/A 060 ± 0.02 transformed VSMC BALB/ c Yes 4 464 30.5 ± 10.9 — 3T3 cells BALB/c No N/A 0.64 ± 0.03 3T3 cells NIH3T3 Yes 4 420 23.2 ± 1.8 — cells NIH3T3 No N/A 0.70 ± 0.02 cells Human Yes 3 506 46.6 ± 8.1 — VSMC Human No N/A 0.33 ± 0.02 VSMC Human Yes 3 336 44.5 ± 2.1 — fibroblasts Human No N/A 0.36 ± 0.01 fibroblasts - S40-transformed vascular smooth muscle cell proliferation was inhibited by GST-Gax protein, as shown in Table 3. The GST-Gax protein also inhibited the proliferation of fibroblast cell lines NIH3T3 and BALB/c human cells, specifically human vascular smooth muscle cells and human foreskin fibroblasts. These results indicate that Gax action is not cell type-specific, although there are differences in the extent inhibition among the different cell types. The Among the human cells, the GST-Gax protein exhibits maximal inhibition in vascular smooth muscle cells, the cell type in which the Gax gene is normally expressed. Similarly among the rat cells, the GST-Gax protein exhibits maximal inhibition in vascular smooth muscle cells, the cell type in which the Gax gene is normally expressed.
- An Oncogenic Ras Protein can Reverse Growth Inhibition Caused by the Gax Protein
- To characterize the mechanism of the growth inhibition conferred by the GST-Gax proteins the effects of GST-Gax protein and the transforming oncoprotein, the ras mutant Ras(Leu-61) were compared by microinjecting these proteins into rat vascular smooth muscle cells. A solution containing both 0.5 mg/ml GST-Gax protein and 0.5 mg/ml Ras(Leu-61) was microinjected into quiescent vascular smooth muscle cells. For comparison, other vascular smooth muscle cells received either 0.5 mg/ml GST-Gax protein or 0.5 mg/ml Ras(Leu-61) or 0.5 mg/ml GST. The injected cells were then incubated for 24 hours with medium containing 10% fetal calf serum and BrdU. The results are shown in FIG. 12.
- As shown in FIG. 12, when Ras(Leu-61) alone was injected, there was an increase in BrdU-labeling as compared to both control-injected cells. In cells injected with GST-Gax protein, growth was inhibited 39%. When the GST-Gax protein and Ras(Leu-61) were coinjected in the cells, the Ras(Leu-61) reversed the growth inhibitory effects of the GST-Gax protein, and the percentage of cells staining positive for BrdU in cells receiving both the Ras(Leu-61) and GST-Gax protein were nearly identical to that observed in cells receiving just the Ras(Leu-61). Thus, the Ras oncoprotein completely reversed the effect of the GST-Gax protein establishing that the presence of GST-Gax protein is not toxic to cells.
- The Gax Protein Inhibits Cell Growth when Microinjected before the GI to S Boundary
- To determine the point in the cell cycle when the Gax gene exerts its growth inhibitory effects, the time of S phase onset was determined in rat vascular smooth muscle cells. The vascular smooth muscle cells were stimulated with 10% fetal calf serum and pulse labeled with 10 mCi/ml3H-thymidine for one hour at different times after stimulation. Serarate cultures of the cells were microinjected with GST-Gax protein at various times after receiving 10% fetal calf serum and labeled with BrdU between 10 and 24 hours after receiving the fetal calf serum. Percent inhibition of S-phase entry was determined at each time point. The results are shown in FIG. 13.
- As shown in FIG. 13, S phase onset, indicated by the uptake of3H-thymidine, occured at approximately 16-18 hours after mitogen stimulation. GST-Gax protein significantly inhibited vascular smooth muscle cell entry into the S phase when microinjected at any time from stimulation up until approximately 12 hours. However, GST-Gax protein was ineffective when injected at 15 hours. Thus it appears that the Gax gene inhibits a critical step in cell cycle progression prior to the G1/S boundary; perhaps before the restriction point in G1 where eukaryotic cells are irreversibly committed to entering the S phase.
- Gax Gene Expression is Rapidly Down Regulated in vivo Upon Acute Blood Vessel Injury
- The Gax gene expression in normal blood vessels and in injured blood vessels was compared to determine whether Gax gene down-regulation occurs in response to injury-induced smooth muscle cell proliferation in vivo. Adult male Sprague-Dawley rats were subject to acute vessel injury by balloon de-endothelialization in the carotid arteries according to the methods of Majesky, M. W., et al.J. Cell. Biol. (1990) Vol. 111, pp. 2149-2158. The expression levels of Gax, that is, the
mRNA 1 vels, were assessed relative to that of glyceraldehyde 3-phosphate dehydrogenase (hereinafter also referred to as “G3”) by a quantitative polymerase chain reaction. At various times following balloon de-endothelialization the rats were sacrificed and the total RNA was isolated from the vascular smooth muscle tissues using the TRI reagent from Molecular Research Center, Inc. The CDNA was synthesized from the extracted RNA with MMLV reverse transcriptase from Bethesda Research Labs. Aliquots of the cDNA pools were subjected to polymerase chain reaction amplification with AmpliTaq DNA polymerase from Perkin-Elmer in.the presence. of α32P-dCTP with the following cycle conditions: 94° C. for 20 seconds, 55° C. for 20 seconds, and 72° C. for 20 seconds. The final cycle had an elongation step at 72° C. for 5 minutes. The primers for the rat Gax amplification were: 5′-CCCGCGCGGCTTTTACATTAGGAGT-3′ and 5′-GCTGGCAAACATGCCCTCCTCATTG-3′. The primers for the rat G3 gene were 5′-TGATGGCATGGACTGTGGTCATGA-3′ and 5′-TGATGGCATGGACTGTGGTCATGA-3′. The Gax cDNA was amplified for 30 cycles, and G3 was amplified for 25 cycles in the same reaction vessels. The amount of a radioactive label incorporated into the amplified cDNA and G3 fragments was determined by subjecting the fragments to electrophoresis on a 1% agarose gel, then excising the bands and liquid scintillation counting. Since the mRNA levels of glyceraldehyde 3-phosphate dehydrogenase remain relatively constant following this procedure (see J. M. Miano et al. 1990, Am. J. Path. 137, 761-765), the ratio of radiolabel incorporation into the Gax-derived amplified bands and the G3-derived amplified bands corrects for differences arising from the efficiency of RNA extraction from the different animals, and it provides a measure of Gax mRNA levels in the normal and injured vascular tissues. These ratios are plotted in FIG. 14. - As shown in FIG. 14, the Gax mRNA expression was down-regulated in response to acute vessel injury by as much as a factor of 20. This down-regulation was rapid and appeared complete by 2 hours, the first time-point following the de-endothelialization procedure. Collectively, these data corroborate the Gax gene down-regulation in cultures of vascular smooth muscle cells following growth factor stimulation. Further, these data show that Gax gene expression is an early marker of the cell cycle activity associated with the initiation of vascular restenosis, and they indicate that Gax has a regulatory role following blood vessel injury.
- The present invention includes: the DNA sequences encoding a protein, or portion thereof, which inhibits vascular. smooth muscle cell proliferation; the messenger RNA transcript of such DNA sequence; and an isolated protein which inhibits vascular smooth muscle cell growth.
- For example, the DNA sequences include: DNA molecules which, but for the degeneracy of the genetic code would hybridize to DNA encoding the Gax protein, thus the degenerate DNA which encodes the Gax protein; DNA strands complementary to DNA sequences encoding the Gax protein or portions thereof including DNA in FIGS. 1 and 3 or portions thereof; heterologous DNA having substantial sequence homology to the DNA encoding the Gax protein, including the DNA sequences in FIGS. 1 and 3 or portions thereof.
- The isolated protein includes, for example, portions of the Gax protein; the Gax protein of animals other than rat and human; and proteins or portions thereof having substantially the same amino acid sequence as shown in FIGS. 1 and 3 or portions thereof.
-
1 19 2244 base pairs nucleic acid both linear cDNA NO NO CDS 197..1108 1 GTCAAGTGTT TATACGTGCA GGAGACTGGC CGCTCGGCTC AGGACTGGGA TTAGCGGGCT 60 CTGCTCAAAC CCGCGCGGCT TTTACATTAG GAGTGAGTGG GGGAGAGTCC TAGGATTTCT 120 AGTGAAAAGT GACAGCGCTT GGTGGACTTT GGGACCTTCG TGAAGTCTTC TGCTTGGAAG 180 CTGAGACTTG CATGCC ATG GAA CAC CCC CTC TTT GGC TGC CTG CGC AGC 229 Met Glu His Pro Leu Phe Gly Cys Leu Arg Ser 1 5 10 CCC CAC GCC ACA GCG CAA GGC TTG CAC CCC TTC TCG CAG TCT TCT CTG 277 Pro His Ala Thr Ala Gln Gly Leu His Pro Phe Ser Gln Ser Ser Leu 15 20 25 GCC CTC CAT GGA AGA TCT GAC CAC ATG TCC TAC CCC GAA CTC TCC ACA 325 Ala Leu His Gly Arg Ser Asp His Met Ser Tyr Pro Glu Leu Ser Thr 30 35 40 TCT TCC TCG TCT TGC ATA ATC GCG GGA TAC CCC AAT GAG GAG GGC ATG 373 Ser Ser Ser Ser Cys Ile Ile Ala Gly Tyr Pro Asn Glu Glu Gly Met 45 50 55 TTT GCC AGC CAG CAT CAC AGG GGG CAC CAC CAC CAC CAC CAC CAC CAC 421 Phe Ala Ser Gln His His Arg Gly His His His His His His His His 60 65 70 75 CAT CAC CAC CAC CAG CAG CAG CAG CAC CAG GCT CTG CAA AGC AAC TGG 469 His His His His Gln Gln Gln Gln His Gln Ala Leu Gln Ser Asn Trp 80 85 90 CAC CTC CCG CAG ATG TCC TCC CCG CCA AGC GCG GCC CGG CAC AGC CTT 517 His Leu Pro Gln Met Ser Ser Pro Pro Ser Ala Ala Arg His Ser Leu 95 100 105 TGC CTG CAG CCT GAT TCC GGA GGG CCC CCG GAG CTG GGG AGC AGC CCT 565 Cys Leu Gln Pro Asp Ser Gly Gly Pro Pro Glu Leu Gly Ser Ser Pro 110 115 120 CCG GTC CTG TGC TCC AAC TCT TCT AGC CTG GGC TCC AGC ACC CCG ACC 613 Pro Val Leu Cys Ser Asn Ser Ser Ser Leu Gly Ser Ser Thr Pro Thr 125 130 135 GGA GCC GCG TGC GCA CCA AGG GAT TAT GGC CGT CAA GCG CTG TCA CCC 661 Gly Ala Ala Cys Ala Pro Arg Asp Tyr Gly Arg Gln Ala Leu Ser Pro 140 145 150 155 GCA GAA GTG GAG AAG AGA AGT GGC AGC AAA AGA AAA AGC GAC AGT TCA 709 Ala Glu Val Glu Lys Arg Ser Gly Ser Lys Arg Lys Ser Asp Ser Ser 160 165 170 GAT TCC CAG GAA GGA AAT TAC AAG TCA GAA GTG AAC AGC AAA CCT AGG 757 Asp Ser Gln Glu Gly Asn Tyr Lys Ser Glu Val Asn Ser Lys Pro Arg 175 180 185 AGG GAA AGA ACA GCT TTC ACC AAA GAG CAA ATC AGA GAA CTT GAG GCA 805 Arg Glu Arg Thr Ala Phe Thr Lys Glu Gln Ile Arg Glu Leu Glu Ala 190 195 200 GAG TTC GCC CAT CAT AAC TAT CTG ACC AGA CTG AGA AGA TAT GAG ATA 853 Glu Phe Ala His His Asn Tyr Leu Thr Arg Leu Arg Arg Tyr Glu Ile 205 210 215 GCG GTG AAC CTA GAC CTC ACT GAA AGA CAG GTG AAA GTG TGG TTC CAG 901 Ala Val Asn Leu Asp Leu Thr Glu Arg Gln Val Lys Val Trp Phe Gln 220 225 230 235 AAC AGG AGA ATG AAG TGG AAG CGG GTC AAG GGG GGA CAA CAA GGA GCT 949 Asn Arg Arg Met Lys Trp Lys Arg Val Lys Gly Gly Gln Gln Gly Ala 240 245 250 GCA GCC CGA GAA AAG GAA CTG GTG AAT GTG AAA AAG GGA ACA CTT CTT 997 Ala Ala Arg Glu Lys Glu Leu Val Asn Val Lys Lys Gly Thr Leu Leu 255 260 265 CCA TCA GAG CTG TCA GGA ATT GGT GCA GCC ACC CTC CAG CAG ACA GGG 1045 Pro Ser Glu Leu Ser Gly Ile Gly Ala Ala Thr Leu Gln Gln Thr Gly 270 275 280 GAC TCA CTA GCA AAT GAC GAC AGT CGC GAT AGT GAC CAC AGC TCT GAG 1093 Asp Ser Leu Ala Asn Asp Asp Ser Arg Asp Ser Asp His Ser Ser Glu 285 290 295 CAC GCA CAC TTA TGATACATAC AGAGACCAGC TCCGTTCTCA GGAAAGCACC 1145 His Ala His Leu 300 ATTGTGATGG CAAATCTCAC CCAAACATCG TTTACATGGC AGATGACTGT GGCAGTGTTG 1205 CTTAATATAA TTAAACGCAG GCATCTCAAG TCTGTTTCTC ATGATTGATA GAAGGTTTAC 1265 ACTAAGTGCC TCTTATTGAA GATGCTTCCA CAGTGAAATT GGAGAAAGTG AACATATCTA 1325 AATATACTTG TTCCTTATAT GACAGAGAGG GAGATGAATG TTTGCTTTGG CTTGCACTGA 1385 AAATTAAATT GCTACCAAGA GCAAACTCGG TAAGACATTT TGACTCAAGT TGTCTCCAGA 1445 GTGAAGATGT TATAGAAATG CTTTGAACAT TCCAGTTGTA CCAGGTCATG TGTGTGACAC 1505 TGGGCAGGTA TTTGCTTTTG CTTGCACTGA AACTTAAACT GCTATCAAGT TAACCCATGA 1565 AATAGTTTAT CTTGAACAGC CACAGTGCCT GAAATCACCA AGTGGATATA AAATGAACTG 1625 AAATTCTGTA TATATTACTC CTAAGTCATT TTCCTGTCTT CACTAATTTT AGCAAATGCA 1685 TTCATATTAG CTGATGAAAA TAGGCTTTCC CGTGGACAAA TGCAGCCAGC TTCTTGTATT 1745 TTTATACATT TTTTTGTCAG TCAGAGACAT CAGTATGTGC TTACTTGTGT TCAAGTAGAG 1805 GAAATGCAGT AGAGTCTGAT AGGACATATT CTTGGTACCA CAGACAAAAC AAATCTTCTG 1865 TTGCATTGAC TATCAACTGC TGCAGATACA TTAGAGAACA CACCTAGCCC CCCTCCAGCC 1925 TCCCTCTGTT ATCGCTCGAA GACATTAGCG TCATAGGCAA GTAGTTACCT TGCCAAATGA 1985 GTCTTGTGTG GCAGATGTCT GATTTTGTAT CTTTAAACTG TTAATGGTAT GTGTCTGCTT 2045 CAGTTAACAG GGAAAAAGAT TTCTTCCTCA TTGTTTATGA TACAAAACCC AAGTGCCAAA 2105 CAAAGCTAGT TCTTCAAGGG ATAGATGAGA AACTGAATGT CTGACAAGTA GACTCAGCGA 2165 AAATACATTA TTTTTCAGAG GCTGTGTATT CATGCAGTAC AAGTCCTTGT ATTTTGTAAA 2225 AAAAAAAGTT AAATAAATG 2244 303 amino acids amino acid linear protein 2 Met Glu His Pro Leu Phe Gly Cys Leu Arg Ser Pro His Ala Thr Ala 1 5 10 15 Gln Gly Leu His Pro Phe Ser Gln Ser Ser Leu Ala Leu His Gly Arg 20 25 30 Ser Asp His Met Ser Tyr Pro Glu Leu Ser Thr Ser Ser Ser Ser Cys 35 40 45 Ile Ile Ala Gly Tyr Pro Asn Glu Glu Gly Met Phe Ala Ser Gln His 50 55 60 His Arg Gly His His His His His His His His His His His His Gln 65 70 75 80 Gln Gln Gln His Gln Ala Leu Gln Ser Asn Trp His Leu Pro Gln Met 85 90 95 Ser Ser Pro Pro Ser Ala Ala Arg His Ser Leu Cys Leu Gln Pro Asp 100 105 110 Ser Gly Gly Pro Pro Glu Leu Gly Ser Ser Pro Pro Val Leu Cys Ser 115 120 125 Asn Ser Ser Ser Leu Gly Ser Ser Thr Pro Thr Gly Ala Ala Cys Ala 130 135 140 Pro Arg Asp Tyr Gly Arg Gln Ala Leu Ser Pro Ala Glu Val Glu Lys 145 150 155 160 Arg Ser Gly Ser Lys Arg Lys Ser Asp Ser Ser Asp Ser Gln Glu Gly 165 170 175 Asn Tyr Lys Ser Glu Val Asn Ser Lys Pro Arg Arg Glu Arg Thr Ala 180 185 190 Phe Thr Lys Glu Gln Ile Arg Glu Leu Glu Ala Glu Phe Ala His His 195 200 205 Asn Tyr Leu Thr Arg Leu Arg Arg Tyr Glu Ile Ala Val Asn Leu Asp 210 215 220 Leu Thr Glu Arg Gln Val Lys Val Trp Phe Gln Asn Arg Arg Met Lys 225 230 235 240 Trp Lys Arg Val Lys Gly Gly Gln Gln Gly Ala Ala Ala Arg Glu Lys 245 250 255 Glu Leu Val Asn Val Lys Lys Gly Thr Leu Leu Pro Ser Glu Leu Ser 260 265 270 Gly Ile Gly Ala Ala Thr Leu Gln Gln Thr Gly Asp Ser Leu Ala Asn 275 280 285 Asp Asp Ser Arg Asp Ser Asp His Ser Ser Glu His Ala His Leu 290 295 300 941 base pairs nucleic acid both linear cDNA NO NO CDS 33..941 3 GTCTTCTACC TGGAACCCGA AACTTGCATG CT ATG GAA CAC CCG CTC TTT GGC 53 Met Glu His Pro Leu Phe Gly 1 5 TGC CTG CGC AGC CCT CAC GCC ACG GCG CAA GGC TTG CAC CCG TTC TCC 101 Cys Leu Arg Ser Pro His Ala Thr Ala Gln Gly Leu His Pro Phe Ser 10 15 20 CAA TCC TCT CTC GCC CTC CAT GGA AGA TCT GAC CAT ATG TCT TAC CCC 149 Gln Ser Ser Leu Ala Leu His Gly Arg Ser Asp His Met Ser Tyr Pro 25 30 35 GAG CTC TCT ACT TCT TCC TCA TCT TGC ATA ATC GCG GGA TAC CCC AAC 197 Glu Leu Ser Thr Ser Ser Ser Ser Cys Ile Ile Ala Gly Tyr Pro Asn 40 45 50 55 GAA GAG GAC ATG TTT GCC AGC CAG CAT CAC AGG GGG CAC CAC CAC CAC 245 Glu Glu Asp Met Phe Ala Ser Gln His His Arg Gly His His His His 60 65 70 CAC CAC CAC CAT CAC CAC CAT CAG CAG CAG CAG CAC CAG GCT CTG CAA 293 His His His His His His His Gln Gln Gln Gln His Gln Ala Leu Gln 75 80 85 ACC AAC TGG CAC CTC CCG CAG ATG TCT TCC CCA CCG AGT GCG GCT CGG 341 Thr Asn Trp His Leu Pro Gln Met Ser Ser Pro Pro Ser Ala Ala Arg 90 95 100 CAT AGC CTC TGC CTC CAG CCC GAC TCT GGA GGG CCC CCA GAG TTG GGG 389 His Ser Leu Cys Leu Gln Pro Asp Ser Gly Gly Pro Pro Glu Leu Gly 105 110 115 AGC AGC CCG CCC GTC CTG TGC TCC AAC TCT TCC AGC TTG GGC TCC AGC 437 Ser Ser Pro Pro Val Leu Cys Ser Asn Ser Ser Ser Leu Gly Ser Ser 120 125 130 135 ACC CCG ACT GGG GCC GCG TGC GCG CCG GGG GAC TAC GGC CGC CAG GCA 485 Thr Pro Thr Gly Ala Ala Cys Ala Pro Gly Asp Tyr Gly Arg Gln Ala 140 145 150 CTG TCA CCT GCG GAG GCG GAG AAG CGA AGC GGC GGC AAG AGG AAA AGC 533 Leu Ser Pro Ala Glu Ala Glu Lys Arg Ser Gly Gly Lys Arg Lys Ser 155 160 165 GAC AGC TCA GAC TCC CAG GAA GGA AAT TAC AAG TCA GAA GTC AAC AGC 581 Asp Ser Ser Asp Ser Gln Glu Gly Asn Tyr Lys Ser Glu Val Asn Ser 170 175 180 AAA CCC AGG AAA GAA AGG ACA GCA TTT ACC AAA GAG CAA ATC AGA GAA 629 Lys Pro Arg Lys Glu Arg Thr Ala Phe Thr Lys Glu Gln Ile Arg Glu 185 190 195 CTT GAA GCA GAA TTT GCC CAT CAT AAT TAT CTC ACC AGA CTG AGG CGA 677 Leu Glu Ala Glu Phe Ala His His Asn Tyr Leu Thr Arg Leu Arg Arg 200 205 210 215 TAC GAG ATA GCA GTG AAT CTG GAT CTC ACT GAA AGA CAG GTA AAA GTC 725 Tyr Glu Ile Ala Val Asn Leu Asp Leu Thr Glu Arg Gln Val Lys Val 220 225 230 TGG TTC CAA AAC AGG CGG ATG AAG TGG AAG AGG GTA AAG GGT GGA CAG 773 Trp Phe Gln Asn Arg Arg Met Lys Trp Lys Arg Val Lys Gly Gly Gln 235 240 245 CAA GGA GCT GCG GCT CGG GAA AAG GAA CTG GTG AAT GTG AAA AAG GGA 821 Gln Gly Ala Ala Ala Arg Glu Lys Glu Leu Val Asn Val Lys Lys Gly 250 255 260 ACA CTT CTC CCA TCA GAG CTG TCG GGA ATT GGT GCA GCC ACC CTC CAG 869 Thr Leu Leu Pro Ser Glu Leu Ser Gly Ile Gly Ala Ala Thr Leu Gln 265 270 275 CAA ACA GGG GAC TCT ATA GCA AAT GAA GAC AGT CAC GAC AGT GAC CAC 917 Gln Thr Gly Asp Ser Ile Ala Asn Glu Asp Ser His Asp Ser Asp His 280 285 290 295 AGC TCA GAG CAC GCC CAC CTC TGA 941 Ser Ser Glu His Ala His Leu 300 302 amino acids amino acid linear protein 4 Met Glu His Pro Leu Phe Gly Cys Leu Arg Ser Pro His Ala Thr Ala 1 5 10 15 Gln Gly Leu His Pro Phe Ser Gln Ser Ser Leu Ala Leu His Gly Arg 20 25 30 Ser Asp His Met Ser Tyr Pro Glu Leu Ser Thr Ser Ser Ser Ser Cys 35 40 45 Ile Ile Ala Gly Tyr Pro Asn Glu Glu Asp Met Phe Ala Ser Gln His 50 55 60 His Arg Gly His His His His His His His His His His His Gln Gln 65 70 75 80 Gln Gln His Gln Ala Leu Gln Thr Asn Trp His Leu Pro Gln Met Ser 85 90 95 Ser Pro Pro Ser Ala Ala Arg His Ser Leu Cys Leu Gln Pro Asp Ser 100 105 110 Gly Gly Pro Pro Glu Leu Gly Ser Ser Pro Pro Val Leu Cys Ser Asn 115 120 125 Ser Ser Ser Leu Gly Ser Ser Thr Pro Thr Gly Ala Ala Cys Ala Pro 130 135 140 Gly Asp Tyr Gly Arg Gln Ala Leu Ser Pro Ala Glu Ala Glu Lys Arg 145 150 155 160 Ser Gly Gly Lys Arg Lys Ser Asp Ser Ser Asp Ser Gln Glu Gly Asn 165 170 175 Tyr Lys Ser Glu Val Asn Ser Lys Pro Arg Lys Glu Arg Thr Ala Phe 180 185 190 Thr Lys Glu Gln Ile Arg Glu Leu Glu Ala Glu Phe Ala His His Asn 195 200 205 Tyr Leu Thr Arg Leu Arg Arg Tyr Glu Ile Ala Val Asn Leu Asp Leu 210 215 220 Thr Glu Arg Gln Val Lys Val Trp Phe Gln Asn Arg Arg Met Lys Trp 225 230 235 240 Lys Arg Val Lys Gly Gly Gln Gln Gly Ala Ala Ala Arg Glu Lys Glu 245 250 255 Leu Val Asn Val Lys Lys Gly Thr Leu Leu Pro Ser Glu Leu Ser Gly 260 265 270 Ile Gly Ala Ala Thr Leu Gln Gln Thr Gly Asp Ser Ile Ala Asn Glu 275 280 285 Asp Ser His Asp Ser Asp His Ser Ser Glu His Ala His Leu 290 295 300 29 base pairs nucleic acid single linear cDNA NO NO modified_base 6 /mod_base= i modified_base 21 /mod_base= i modified_base 24 /mod_base= i 5 AARATWTGGT TYCARAAYMG WMGWATGAA 29 18 base pairs nucleic acid single linear cDNA NO YES modified_base 4 /mod_base= i 6 TCAWARRTGW GCRTGYTC 18 30 base pairs nucleic acid single linear cDNA NO NO 7 GCGCGCAGAT CTCACTGAAA GACAGGTAAA 30 20 base pairs nucleic acid single linear cDNA NO YES 8 TTTACCTGTC TTTCAGTGAG 20 32 base pairs nucleic acid single linear cDNA NO YES 9 GCGCGCAGAT CTAGATTCAC TGCTATCTCG TA 32 36 base pairs nucleic acid single linear cDNA NO YES 10 GCGCGTGCCC CCTCTGATGC TGGCTGGCAA ACATGT 36 32 base pairs nucleic acid single linear cDNA NO 11 GCGCGCTCTT GAAGGGCGAG AGAGGATTGG GA 32 38 base pairs nucleic acid single linear cDNA NO NO 12 CTGGTTCGGC CCACCTCTGA AGGTTCCAGA ATCGATAG 38 35 base pairs nucleic acid single linear cDNA NO NO 13 GGAGACTTCC AAGGTCTTAG CTATCACTTA AGCAC 35 30 base pairs nucleic acid single linear cDNA NO 14 GCGCGCGTCG ACGAACACCC CCTCTTTGGC 30 30 base pairs nucleic acid single linear cDNA NO NO 15 GCGCGCAAGC TTTCATAAGT GTGCGTGCTC 30 25 base pairs nucleic acid single linear cDNA NO NO 16 CCCGCGCGGC TTTTACATTA GGAGT 25 25 base pairs nucleic acid single linear cDNA NO NO 17 GCTGGCAAAC ATGCCCTCCT CATTG 25 24 base pairs nucleic acid single linear cDNA NO NO 18 TGATGGCATG GACTGTGGTC ATGA 24 24 base pairs nucleic acid single linear cDNA NO NO 19 TGATGGCATG GACTGTGGTC ATGA 24
Claims (32)
1. A DNA sequence encoding a protein or portion thereof, which inhibits vascular smooth muscle cell proliferation.
2. The DNA sequence of claim 1 , comprising the nucleotide sequence substantially as shown in FIG. 1.
3. The DNA sequence of claim 1 , comprising the nucleotide sequence substantially as shown in FIG. 3.
4. The DNA sequence of claim 1 , comprising the nucleotide sequence from about 200 to about 1108 substantially as shown in FIG. 1.
5. The DNA sequence of claim 1 , comprising the nucleotide sequence from about 749 to about 919 substantially as shown in FIG. 1.
6. The messenger RNA transcript of the DNA of claim 1 .
7. An isolated protein which inhibits vascular smooth muscle cell growth.
8. The protein of claim 7 having a molecular weight of from about 30 kDA to about 36 kDa.
9. The protein of claim 7 , comprising the amino acid sequence substantially as shown in FIG. 1.
10. The protein of claim 7 , comprising the amino acid sequence substantially as shown in FIG. 3.
11. The protein of claim 7 , comprising the amino acid sequence from about 1 to about 303 substantially as shown in FIG. 1.
12. The protein of claim 7 , further comprising glutathione S-transferase.
13. A vector containing the DNA sequence of claim 1 .
14. The vector of claim 13 , wherein the nucleotide sequence is the nucleotide sequence of claim 2 .
15. The vector of claim 13 , wherein the nucleotide sequence is the nucleotide sequence of claim 3 .
16. The vector of claim 13 , wherein the nucleotide sequence is the nucleotide sequence of claim 4 .
17. The vector of claim 13 , wherein the nucleotide sequence is the nucleotide sequence of claim 5 .
18. A host cell transformed by vector of claim 13 containing the nucleotide sequence coding for Gax protein.
19. A host cell transformed by vector of claim 14 containing the nucleotide sequence coding for Gax protein.
20. A host cell transformed by vector of claim 15 containing the nucleotide sequence coding for Gax protein.
21. A host cell transformed by vector of claim 16 containing the nucleotide sequence encoding the Gax protein.
22. A host cell transformed by vector of claim 17 containing the nucleotide sequence encoding the Gax protein.
23. A process for the preparation of Gax protein comprising culturing the transformed host of claim 18 under conditions suitable for the expression of Gax protein and recovering the Gax protein.
24. A process for the preparation of a protein which inhibits the proliferation of vascular smooth muscle cells comprising culturing the transformed host of claim 19 under conditions suitable for the expression of the protein and recovering the protein.
25. A process for the preparation of a protein which inhibits the proliferation of vascular smooth muscle cells comprising culturing the transformed host of claim 20 under conditions suitable for the expression of the protein and recovering the protein.
26. A process for the preparation of a protein which inhibits the proliferation of vascular smooth muscle cells comprising culturing the transformed host of claim 21 under conditions suitable for the expression of the protein and recovering the protein.
27. The Gax protein made by the process selected from the processes of claim 23 , claim 24 , claim 25 , and claim 26 .
28. A method for inhibiting the proliferation of eukaryotic cells, comprising the following steps:
a. providing nucleic acid sequence encoding a protein, or portion thereof, which inhibits vascular smooth muscle cell proliferation; and
b. administering said nucleic acid or said protein to the cells.
29. The method of claim 28 wherein the nucleic acid is DNA.
30. The method of claim 28 wherein the nucleic acid is RNA.
31. The method of claim 28 wherein the protein comprises the amino acid sequence from about 1 to 303 shown in FIG. 1.
32. The method of claim 28 wherein the cells are vascular smooth muscle cells.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/638,746 US20040077002A1 (en) | 1994-02-24 | 2003-08-11 | Growth arrest homeobox gene |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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US08/203,532 US5856121A (en) | 1994-02-24 | 1994-02-24 | Growth arrest homebox gene |
US09/078,465 US6280969B1 (en) | 1994-02-24 | 1998-05-14 | Growth arrest homeobox gene |
US09/940,673 US6897293B2 (en) | 1994-02-24 | 2001-08-27 | Growth arrest homeobox gene |
US10/638,746 US20040077002A1 (en) | 1994-02-24 | 2003-08-11 | Growth arrest homeobox gene |
Related Parent Applications (1)
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US09/940,673 Division US6897293B2 (en) | 1994-02-24 | 2001-08-27 | Growth arrest homeobox gene |
Publications (1)
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US20040077002A1 true US20040077002A1 (en) | 2004-04-22 |
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Family Applications (10)
Application Number | Title | Priority Date | Filing Date |
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US08/203,532 Ceased US5856121A (en) | 1994-02-24 | 1994-02-24 | Growth arrest homebox gene |
US09/078,465 Expired - Fee Related US6280969B1 (en) | 1994-02-24 | 1998-05-14 | Growth arrest homeobox gene |
US09/755,320 Expired - Lifetime USRE39219E1 (en) | 1994-02-24 | 2001-01-05 | Growth arrest homebox gene |
US09/940,673 Expired - Fee Related US6897293B2 (en) | 1994-02-24 | 2001-08-27 | Growth arrest homeobox gene |
US10/462,970 Abandoned US20030212266A1 (en) | 1994-02-24 | 2003-06-17 | Growth arrest homeobox gene |
US10/638,710 Abandoned US20040043454A1 (en) | 1994-02-24 | 2003-08-11 | Growth arrest homeobox gene |
US10/638,709 Abandoned US20040082037A1 (en) | 1994-02-24 | 2003-08-11 | Growth arrest homeobox gene |
US10/638,694 Abandoned US20040049023A1 (en) | 1994-02-24 | 2003-08-11 | Growth arrest homeobox gene |
US10/638,746 Abandoned US20040077002A1 (en) | 1994-02-24 | 2003-08-11 | Growth arrest homeobox gene |
US10/784,513 Abandoned US20060141476A1 (en) | 1994-02-24 | 2004-02-23 | Growth arrest homeobox gene |
Family Applications Before (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/203,532 Ceased US5856121A (en) | 1994-02-24 | 1994-02-24 | Growth arrest homebox gene |
US09/078,465 Expired - Fee Related US6280969B1 (en) | 1994-02-24 | 1998-05-14 | Growth arrest homeobox gene |
US09/755,320 Expired - Lifetime USRE39219E1 (en) | 1994-02-24 | 2001-01-05 | Growth arrest homebox gene |
US09/940,673 Expired - Fee Related US6897293B2 (en) | 1994-02-24 | 2001-08-27 | Growth arrest homeobox gene |
US10/462,970 Abandoned US20030212266A1 (en) | 1994-02-24 | 2003-06-17 | Growth arrest homeobox gene |
US10/638,710 Abandoned US20040043454A1 (en) | 1994-02-24 | 2003-08-11 | Growth arrest homeobox gene |
US10/638,709 Abandoned US20040082037A1 (en) | 1994-02-24 | 2003-08-11 | Growth arrest homeobox gene |
US10/638,694 Abandoned US20040049023A1 (en) | 1994-02-24 | 2003-08-11 | Growth arrest homeobox gene |
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US10/784,513 Abandoned US20060141476A1 (en) | 1994-02-24 | 2004-02-23 | Growth arrest homeobox gene |
Country Status (8)
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US (10) | US5856121A (en) |
EP (1) | EP0754187A4 (en) |
JP (1) | JPH09509324A (en) |
KR (1) | KR970701199A (en) |
AU (1) | AU711134B2 (en) |
BR (1) | BR1100839A (en) |
CA (1) | CA2183863A1 (en) |
WO (1) | WO1995023161A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US20050033735A1 (en) * | 2003-03-25 | 2005-02-10 | Saul Shapiro | Intergenerational interactive lifetime journaling/diaryand advice/guidance system |
Families Citing this family (20)
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US5856121A (en) * | 1994-02-24 | 1999-01-05 | Case Western Reserve University | Growth arrest homebox gene |
FR2732357B1 (en) * | 1995-03-31 | 1997-04-30 | Rhone Poulenc Rorer Sa | VIRAL VECTORS AND USE FOR THE TREATMENT OF HYPERPROLIFERATIVE DISORDERS, ESPECIALLY RESTENOSIS |
FR2740344B1 (en) * | 1995-10-31 | 1997-11-21 | Rhone Poulenc Rorer Sa | APPLICATION OF PROTEIN GAX TO THE TREATMENT OF CANCERS |
WO1998010090A1 (en) * | 1996-09-06 | 1998-03-12 | St. Elizabeth's Medical Center Of Boston, Inc. | Gata-6 transcription factor: compositions and methods |
FR2754822B1 (en) * | 1996-10-18 | 1998-11-27 | Rhone Poulenc Rorer Sa | POLYPEPTIDES COMPRISING PROTEIN GAS DOMAINS, INVOLVED IN TRANSCRIPTION REPRESSION AND / OR INTERACTING WITH OTHER PROTEINS, CORRESPONDING NUCLEIC ACIDS AND USES THEREOF |
US6969601B2 (en) | 1997-04-03 | 2005-11-29 | Jensenius Jens Chr | MASP-2, a complement-fixing enzyme, and uses for it |
AUPR518501A0 (en) * | 2001-05-22 | 2001-06-14 | Unisearch Limited | Yin yang-1 |
PL2374819T3 (en) | 2003-05-12 | 2017-09-29 | Helion Biotech Aps | Antibodies to MASP-2 |
US7919094B2 (en) | 2004-06-10 | 2011-04-05 | Omeros Corporation | Methods for treating conditions associated with MASP-2 dependent complement activation |
US8840893B2 (en) | 2004-06-10 | 2014-09-23 | Omeros Corporation | Methods for treating conditions associated with MASP-2 dependent complement activation |
EP3530288A3 (en) | 2004-06-10 | 2019-12-18 | Omeros Corporation | Methods for treating conditions associated with masp-2 dependent complement activation |
HUE030897T2 (en) | 2009-10-16 | 2017-06-28 | Omeros Corp | Methods for treating disseminated intravascular coagulation by inhibiting masp-2 dependent complement activation |
US9644035B2 (en) | 2011-04-08 | 2017-05-09 | Omeros Corporation | Methods for treating conditions associated with MASP-2 dependent complement activation |
KR20210021101A (en) | 2011-04-08 | 2021-02-24 | 유니버시티 오브 레스터 | Methods for treating conditions associated with masp-2 dependent complement activation |
ES2795667T3 (en) | 2011-05-04 | 2020-11-24 | Omeros Corp | Compositions to inhibit MASP-2-dependent complement activation |
WO2013180834A2 (en) | 2012-04-06 | 2013-12-05 | Omeros Corporation | Compositions and methods of inhibting masp-1 and/or masp-3 for the treatment of paroxysmal nocturnal hemoglobinuria |
EP3878865A3 (en) | 2012-06-18 | 2021-12-08 | Omeros Corporation | Compositions and methods of inhibiting masp-1 and/or masp-2 and/or masp-3 for the treatment of various diseases and disorders |
CN111588855A (en) | 2013-10-17 | 2020-08-28 | 奥默罗斯公司 | Methods for treating conditions associated with MASP-2 dependent complement activation |
JOP20170154B1 (en) | 2016-08-01 | 2023-03-28 | Omeros Corp | Compositions and methods of inhibiting masp-3 for the treatment of various diseases and disorders |
TWI818919B (en) | 2017-08-15 | 2023-10-21 | 美商歐米諾斯公司 | Methods for treating and/or preventing graft-versus-host disease and/or diffuse alveolar hemorrhage and/or veno-occlusive disease associated with hematopoietic stem cell transplant |
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- 1994-02-24 US US08/203,532 patent/US5856121A/en not_active Ceased
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- 1995-02-22 EP EP95912554A patent/EP0754187A4/en not_active Withdrawn
- 1995-02-22 JP JP7522379A patent/JPH09509324A/en not_active Ceased
- 1995-02-22 AU AU19661/95A patent/AU711134B2/en not_active Ceased
- 1995-02-22 WO PCT/US1995/001882 patent/WO1995023161A1/en not_active Application Discontinuation
- 1995-02-22 CA CA002183863A patent/CA2183863A1/en not_active Abandoned
- 1995-02-22 KR KR1019960704689A patent/KR970701199A/en not_active Application Discontinuation
-
1997
- 1997-05-12 BR BR1100839-3A patent/BR1100839A/en active IP Right Grant
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- 1998-05-14 US US09/078,465 patent/US6280969B1/en not_active Expired - Fee Related
-
2001
- 2001-01-05 US US09/755,320 patent/USRE39219E1/en not_active Expired - Lifetime
- 2001-08-27 US US09/940,673 patent/US6897293B2/en not_active Expired - Fee Related
-
2003
- 2003-06-17 US US10/462,970 patent/US20030212266A1/en not_active Abandoned
- 2003-08-11 US US10/638,710 patent/US20040043454A1/en not_active Abandoned
- 2003-08-11 US US10/638,709 patent/US20040082037A1/en not_active Abandoned
- 2003-08-11 US US10/638,694 patent/US20040049023A1/en not_active Abandoned
- 2003-08-11 US US10/638,746 patent/US20040077002A1/en not_active Abandoned
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US5302706A (en) * | 1991-12-16 | 1994-04-12 | Baylor College Of Medicine | Senescent cell derived inhibitors of DNA synthesis |
US5856121A (en) * | 1994-02-24 | 1999-01-05 | Case Western Reserve University | Growth arrest homebox gene |
US6280969B1 (en) * | 1994-02-24 | 2001-08-28 | Case Western Reserve University | Growth arrest homeobox gene |
US5851521A (en) * | 1995-03-31 | 1998-12-22 | Case Western Reserve University | Viral vectors and their use for treating hyperproliferative disorders, in particular restenosis |
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US20050033735A1 (en) * | 2003-03-25 | 2005-02-10 | Saul Shapiro | Intergenerational interactive lifetime journaling/diaryand advice/guidance system |
Also Published As
Publication number | Publication date |
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US20040049023A1 (en) | 2004-03-11 |
US20030212266A1 (en) | 2003-11-13 |
EP0754187A1 (en) | 1997-01-22 |
US6280969B1 (en) | 2001-08-28 |
US5856121A (en) | 1999-01-05 |
US6897293B2 (en) | 2005-05-24 |
US20040043454A1 (en) | 2004-03-04 |
AU1966195A (en) | 1995-09-11 |
US20060141476A1 (en) | 2006-06-29 |
WO1995023161A1 (en) | 1995-08-31 |
USRE39219E1 (en) | 2006-08-01 |
US20030199067A1 (en) | 2003-10-23 |
JPH09509324A (en) | 1997-09-22 |
AU711134B2 (en) | 1999-10-07 |
BR1100839A (en) | 2000-03-14 |
CA2183863A1 (en) | 1995-08-31 |
EP0754187A4 (en) | 1998-08-05 |
KR970701199A (en) | 1997-03-17 |
US20040082037A1 (en) | 2004-04-29 |
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