WO2000069909A9 - Isolation and characterization of epidermal growth factor related protein - Google Patents
Isolation and characterization of epidermal growth factor related proteinInfo
- Publication number
- WO2000069909A9 WO2000069909A9 PCT/US2000/012884 US0012884W WO0069909A9 WO 2000069909 A9 WO2000069909 A9 WO 2000069909A9 US 0012884 W US0012884 W US 0012884W WO 0069909 A9 WO0069909 A9 WO 0069909A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- errp
- cdna
- egfr
- cells
- hct
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
- C07K14/71—Receptors; Cell surface antigens; Cell surface determinants for growth factors; for growth regulators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
Definitions
- This invention relates to the epidermal growth factor related proteins, polynucleotides encoding these proteins and methods for using these proteins.
- the cellular machinery involved in mitogenesis is complex, and not yet fully understood.
- receptors present on the cell surface bind growth factors, resulting in an activated receptor.
- tyrosine kinase receptors TLRs
- the activated receptors phosphorylate intracellular substrates. These phosphorylated substrates are responsible for a series of events that leads to cell division. This process is generally referred to as "mitogenic signal transduction.
- the molecular machinery involved in this process is considered to be the "mitogenic signaling pathway.”
- TKRs cell surface tyrosine kinase receptors
- PLC-7 phospholipase C
- GAP GTPase activating protein
- EGF Epidermal growth factor
- EGFR Epidermal growth factor receptor
- Errors which occur in the mitogenic signaling pathway are implicated in malignant transformation and cancer. It is believed that in at least some malignancies, interference with such abnormal mitogenic signal transduction could cause the cells to revert to normal phenotype.
- reagents useful in identifying molecular components of the mitogenic signaling pathway find utility as tumor markers for therapeutic, diagnostic, and prognostic purposes. Furthermore, identification of how such components differ from normal components in malignant tissue would be of significant value in understanding and treating such malignancies.
- EGFR a 170 kDa transmembrane glycoprotein protein with intrinsic tyrosine kinase activity, which binds EGF family of peptides, plays an important role in controlling cell proliferation and differentiation as was shown by Ullrich et al. supra.
- the EGFR possesses three functional domains that include extracellular, transmembrane and cytoplasmic. Ligand binding to the extacellular domain of EGFR leads to dimerization and activation of the receptor's intrinsic tyrosine kinase, located in the cytoplasmic domain, triggering a complex array of enzymatic and biological events leading to cell proliferation and differentiation.
- EGFR Overexpression of EGFR has been associated with many malignancies, including cancers of the stomach and colon. Evidence is accumulating which show that malignant as well as certain normal cells also produce other form(s) of EGFR.
- A431 human epidermoid carcinoma cells have been shown to produce a truncated EGFR that encodes a 2.8 kb mRNA transcript and is thought to be the result of gene rearrangement in chromosome 7.
- the normal rat liver produces a 2.7 kb mRNA transcript whose 5 ⁇ but not 3', sequences show 100% homology with the external domain of the full-length rat EGFR .
- the present invention is directed toward a polynucleotide sequence, proteins transcribed from the nucleotide sequence, methods for the use of epidermal growth factor receptor related protein (ERRP) as well as probes for the detection of m-RNA, DNA and cDNA of the described nucleotide sequence and monoclonal antibodies directed toward ERRP.
- ERRP epidermal growth factor receptor related protein
- a cDNA fragment clone of 1583 base pairs with 90-95% sequence homology to mouse epidermal growth factor receptor (EGFR) and a truncated rat EGFR was isolated.
- the full length cDNA revealed 1958 base pairs that contained 227 base pairs of 5' untranslated region and an open reading frame encoding 479 amino acids followed by 290 base pairs of an untranslated region.
- the full length cDNA showed an 84% and 91 % homology, respectively, to a rat truncated EGFR and the mouse EGFR.
- ERRP EGF-Receptor Related Protein
- ERRP cDNA hybridized strongly to a mRNA transcript of about 1.8Kb. Maximal expression was noted in the small intestine, followed by colon, liver gastric mucosa and other tissue.
- the ERRP cDNA represents a new member of the EGFR gene family and the protein product plays a key role in modulating the function of EGFR.
- Fig. 1 Schematic representation of ERRP cDNA showing its homology to a rat truncated EGF-R (T-EGER).
- Fig. 2 Northern-blot analysis showing the mRNA transcript size of
- ERRP in different tissues in rats. Each lane contains l ⁇ g poly A -I- RNA. The membrane was also probed with GAPDH. Changes in relative concentration of
- ERRP mRNA expressed as ratio of ERRP to GAPDH, are shown at the bottom of the figure.
- Fig. 3 RT-PCR reaction showing changes in mRNA levels of ERRP and GAPDH in the control (vector-transfected) and ERRP cDNA transfected (clones 1 and 2) HCT-116 cells. RT-PCR was performed with primers for
- Lanes 1, 2 and 3 represent clones 2, 1 and controls respectively.
- Lanes 4, 5 and 6 represent clones 2, 1 and control.
- Lanes 7, 8 and 9 represent clones 2, 1 and controls. Lane L represents DNA ladder.
- Fig. 4 Effect of ERRP cDNA transfection on proliferation of HCT-
- the control (vector-transfected) and ERRP cDNA transfected cells were maintained in DMEM/10% FBS. Each value represents mean ⁇ SEM for 6 observations.
- Fig. 5 Effects of increasing concentrations of TGF- ⁇ on proliferation of ERRP cDNA or vector-transfected CHT-116 cells. Values represent mean
- Fig. 6 Clonogenic assay in soft agar showing changes in proliferation of HCT-116 following transfection with either ERRP cDNA (clones 1 and 2) or the vector only (controls).
- ERRP cDNA clones 1 and 2
- a vector only controls.
- One milliliter containing 100 cells were sandwiched between 1.8% and 0.3% agarose in DMEM/10% FBS. Plates were incubated at 37°C for 14 days. Values represent mean +SEM of 6 observations.
- Fig. 7 Illustration of the changes in EGF-R tyrosine kinase (Tyr-K) actively in HCT-116 following transfection with ERRP cDNA (clones 1 and 2). Control cells were transfected with the vector.
- Fig. 8 Illustration of the effect of ERRP-fiision protein on EGF-R
- Fig. 9 Comparison of the effects of ERRP-fiision protein of proliferation of HC-116 cells. Cells were exposed to a concentration of 3, 70 and 300 ng/ml of ERRP fusion protein for 48 hours.
- Fig. 10 Tumor growth in SCID mouse xenografts showing the difference in the rate of growth of tumors formed by HCT-116 cells, transfected with ERRP cDNA (clones 1 and 2) or the vector only (control).
- Fig. 11 Autoradiograph showing changes in the activation of EGF-R tyrosine kinase in HCT-116 cells following transfaction with ERRP cDNA
- Fig. 12 Effect of serum starvation (0.1 % FBS) on proliferation of ERRP-overexpressed (clones 1 and 2) and vector transfected (control) HCT-116 cells. Detailed Description of the Invention
- the full-length cDNA thus obtained consisted of 1958 bp which contained 227 bp 5' untranslated region and an open reading frame (ORF) that coded for 479 amino acids which showed a 84% and 91 % homology, respectively, with the rat truncated EGFR and the external domain of the mouse EGFR. It also possessed a little over 80% homology with the external domain of the human EGFR.
- ORF open reading frame
- the full-length cDNA was isolated and consists of 1958 base pairs (bp) that included 227 bp 5' untranslated region (UTR) and a putative open reading frame (ORF) of 1437 nucleotides encoding 479 amino acids, and a 290 nucleotide 3' UTR as is shown in Sequence 1.
- bp bp 5' untranslated region
- ORF putative open reading frame
- ERRP cDNA hybridized strongly to a mRNA transcript of about 1.8 kb with maximal expression noted in the small intestine, followed by colon, liver, gastric mucosa and other tissues. No hybridization of ERRP cDNA to 1.8 kb mRNA transcript was observed in testes, brain and heart. In addition to the 1.8 kb mRNA transcript, ERRP cDNA also reacted strongly with 2.8 kb transcript in the liver, and with 0.6, 2.8 and 5.0 kb mRNAs in certain tissues, most notably in the colon. The transcript size 5.0 kb may represent EGFR. However, no expression of ERRP mRNA was observed in the heart as is shown in Fig. 2.
- cDNA for ERRP was stably transfected in HCT-116 cells, a colon cancer cell line.
- RNA extracted from cells grown from these clones were subsequently subjected to RT-PCR analysis with primers generated from 1.6 kb fragment of the full-length 1.8 kb ERRP.
- RT-PCR analysis revealed ERRP mRNA in clones #1 and #2 with minimal to no-detectable levels in the other two clones as is shown in Fig. 3.
- ERRP expression was higher in clone #1 than clone #2.
- No ERRP mRNA was detected in control cells (transfected with the vector alone). In contrast, no apparent difference in GAPDH mRNA levels were found among the different clones.
- TGF- ⁇ -induced proliferation of ERRP transfected and control HCT-116 cells was examined.
- 48 h serum-starved (0.1 % FBS) cells from clones 1 and 2 as well as those from the vector-transfected clone were maintained for 24 h in the absence (basal) or presence of increasing concentration of TGF- ⁇ (10 "n to 10 '9 M).
- transfection of ERRP in HCT-116 cells was examined in soft agar over a period of 14 days.
- transfection of ERRP in HCT-116 cells markedly decreased their ability to grow in soft agar.
- Number of colonies formed by clones 1 and 2 were 65% and 40% lower, respectively, compared to the control clone. Size of the colonies formed by clone 1 or 2 was also found to be considerably smaller than those formed by the vector- transfected control clone.
- Serum starvation also resulted in a marked 50-70% inhibition in proliferation of ERRP-transfected HCT-116 cells (clones 1 and 2) compared to the vector-transfected control cells as seen in Fig. 12.
- the role of ERRP in regulating EGF-R Tyr-K activity was determined by raising an ERRP fusion protein in E. coli. Purified ERRP-fiision protein was bound to its carrier MBP (molecular binding protein, then utilized to study its effects on EGF-R Tyr-K activity in HCT-116 cells, as seen in Fig. 8.
- HCT-116 cells were exposed to 5 ⁇ g of MBP-bound ERRP for 5 minutes at 37 °C a marked reduction (80-90%) in EGF-R Tyr-K activity was observed when compared to HCT-116 cells exposed to either MBP alone or to control cells.
- the antiproliferation effect of ERRP-fiision protein was determined by exposing HCT-116 cells to ERRP-fiision protein for 48 hours. As is seen in Fig. 9, exposure of HCT-116 cells to the ERRP fusion protein for 48 hours reduced proliferation by 25-30% compared to control cells.
- mice were injected with either 5x10° HCT-116 cells (clone 1 or 2) per flank or 5xl0 6 HCT-116 cells (control, transfected with vector) per flank. Tumor growth was monitored and when the tumor(s) attained the size of approximately 1800 mg, the mice were killed. It was observed that in mice injected with control cells, the tumor(s) attained the required weight on the 24 th day after injection, whereas with clone 1 or 2, it took 14-16 days longer for tumor(s) to grow to that size as is seen in Fig. 10. Tumor growth was slowest for clone 1 transfected cells as was colony formation in soft agar.
- the ERRP was isolated and characterized and the fusion protein made in the following example.
- RNA-STAT solution Tel-Test, Friendswood, TX
- poly A + was isolated from total RNA by oligo(dT) cellulose chromatography according to the instructions provided by GIBCO-BRL (Gaithersburg, MD).
- cDNA expression library and screening Poly A + RNA, isolated from mucosal scrapings from the gastro-duodenal region of the gastrointestinal tract was utilized for this purpose.
- An unamplified cDNA expression library was constructed using the EcoRI cloning sites of the ⁇ gll vector system in Y1090r- strain according to the conditions recommended by Stratagene (La Jolla, CA).
- the ligated vector-insert was packaged using Giga- Pack bacterial extracts supplied by Stratagene.
- the library thus constructed contained 3 x 10 6 pfu (plaque forming units) per ml. Non-recombinant phage associated with the library was about 4%.
- the reason for constructing an unamplified mucosal library was to minimize the analysis of identical positive clones.
- the mixture was incubated at 41 °C for 2 h and the product was subsequently used for amplification of 3 '-end of 1.6 kb fragment of ERRP.
- the reaction mixture in 50 ⁇ l contained: 1 ⁇ l of first strand cDNA, 3'-end primer [5 * -CGCACTCCTCCTCTAGACCCAC-3'] and (dT) 17-adaptor [25 pmol each], 10% dimethylsulfoxide, 1.5 mM of each dNTP.
- the mixture was heat denatured for 5 min at 95 °C, annealed for 2 min at 53° C in the presence of 2.5 U of Taq DNA polymerase followed by extension for 40 min at 75 °C.
- the PCR reaction for amplification was carried out for 40 cycles using a step program (denaturation at 94°C for 40 sec; annealing at 53 °C for 2 min and extension at 72°C for 3 min) followed by a 15 min final extension at 72 °C.
- PCR products from above were directly ligated into pCRII vector (TA cloning kit, Invitogen Corp.), followed by transformation of electro- competent E. Coli DH5 ⁇ cells with one tenth (l/10 ,h ) of the ligation DNA. Approximately 10,000 independent bacterial colonies were screened by colony hybridization mrthodology using PCR amplified 3' end of ERRP cDNA (from positions 1444 to 1578) as probe. Several independent colonies were identified, followed by the secondary screening in order to obtain purified plasmids.
- pCRII vector TA cloning kit, Invitogen Corp.
- UV cross-linker Strategene, La Jolla, CA
- Hybridization with 32 P-labeled RNA probe of 1.5 kb cDNA under study was performed for 18 h at 50° C in the same solution.
- the plasmid pBK containing 1.6 kb cDNA was linearized by digesting with Pstl.
- the antisense RNA probe was then synthesized using 1 ⁇ g of linearized plasmid with T3 RNA polymerase with the use of a commercial kit (StripAble RNA, Ambion, Austin, TX). Glyceraldehyde-3- phosphate dehydrogenase (GAPDH) was used as an internal control.
- GAPDH RNA probe was prepared by transcribing 1 ⁇ g of pTRl-GAPDH (rat; Ambion) with T3 RNA polymerase. The probes were labeled with [( ⁇ - 32 P]UTP according to the manufacturer's instructions.
- HCT-116 cells maintained in Dulbecco's modified Eagle's medium (DMEM) supplemented with 10% fetal bovine serum (FBS), 100 U/ml streptomycin-penicillin and 0.25 ⁇ g/ml amphotericin B, were transfected with either 1.6 kb portion of the 1.8 kb full-length ERRP cDNA or the vector alone (control) by lipofectin according to the manufacturer's instruction (GIBCO-
- Oligo (dT)16 and 2.5 MuLV reverse transcriptase were incubated at room temperature for 10 min followed by incubations at 42°C for 30 min, 95 °C for 5 min and finally 5°C for 5 min.
- First strand cDNA thus obtained was used for PCR analysis utilizing Amplitaq DNA polymerase (Perkin Elmer) and 0.15 ⁇ M of upstream primer [5'-
- CGCACTCCTCCTCTAGACCCAC-3' (taken from ERRP sequence) and 0.15 ⁇ M downstream primer [5 ⁇ TTAACCCTCACTAAAGGGA3'] taken from pcDNA 3.1(+) vector, and/or GAPDH upstream [5'- ACCACAGTCCATGCCATCAC-3'] and downstream primers [5- TCCACCACCCTGTTGCTGTA-3 '] .
- the PCR reaction for amplification was carried out for 35 cycles using a step program (denaturation at 95 °C for 1 min; annealing at 63 °C for 1 min and extension at 72 °C for 1 min followed by a 15 * min final extension at 72 °C.
- Tyrosine kinase activity of EGFR The enzyme activity was determined in lysed cells according to our standard protocol. Briefly, plated cells were lysed in lysis buffer [50 mM tris-HC], pH 7.4, 100 mM NaCl, 2.5 mM EDTA, 1 % Triton X-100, 1 % Nonidet P-40, 2.5 nM Na 3 VO 4 , 25 ⁇ g/ml aprotinen, 25 ⁇ g/ml leupeptin and 50 ⁇ g/ml soybean trypsin inhibitor] using a Dounce homogenizer The homogenate was stirred in a mechanical rotator for
- the immune complexes were precipitated with Sepharose bound protein-G, washed several times with kinase buffer (25 mM HEPES, pH 7.5, 5 mM mnCl 2 , 2.5 mM MgCl 2 , 0.5 mM, ditheothreitol, 0.5 mM Na 3 VO 4 , 10 mM p-nitrophenol phosphate, 5 mM ⁇ -glyverol phosphate).
- the immunoprecipitates were resuspending in 30 ⁇ l kinase reaction buffer [HEPES, pH 7.5, 10 mM MnCl 2 , 2.5 mM MgCl 2 , 0.1 M Nacl
Abstract
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AU50032/00A AU5003200A (en) | 1999-05-14 | 2000-05-12 | Isolation and characterization of epidermal growth factor related protein |
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US13420099P | 1999-05-14 | 1999-05-14 | |
US60/134,200 | 1999-05-14 |
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WO2000069909A1 WO2000069909A1 (en) | 2000-11-23 |
WO2000069909A9 true WO2000069909A9 (en) | 2002-07-04 |
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PCT/US2000/012884 WO2000069909A1 (en) | 1999-05-14 | 2000-05-12 | Isolation and characterization of epidermal growth factor related protein |
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US (2) | US6399743B1 (en) |
AU (1) | AU5003200A (en) |
WO (1) | WO2000069909A1 (en) |
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US7393823B1 (en) | 1999-01-20 | 2008-07-01 | Oregon Health And Science University | HER-2 binding antagonists |
US7625859B1 (en) * | 2000-02-16 | 2009-12-01 | Oregon Health & Science University | HER-2 binding antagonists |
US7396810B1 (en) * | 2000-08-14 | 2008-07-08 | Oregon Health Sciences University | Compositions and methods for treating cancer by modulating HER-2 and EGF receptors |
EP1585966B8 (en) | 2002-07-15 | 2012-03-07 | F. Hoffmann-La Roche AG | Treatment of cancer with the anti-ErbB2 antibody rhuMAb 2C4 |
US20050239088A1 (en) * | 2003-05-16 | 2005-10-27 | Shepard H M | Intron fusion proteins, and methods of identifying and using same |
EP1493445A1 (en) * | 2003-07-04 | 2005-01-05 | Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. | Inhibition of stress-induced ligand-dependent EGFR activation |
US20060286102A1 (en) * | 2004-05-14 | 2006-12-21 | Pei Jin | Cell surface receptor isoforms and methods of identifying and using the same |
CN114053429A (en) | 2004-06-01 | 2022-02-18 | 健泰科生物技术公司 | Antibody-drug conjugates and methods |
US20100111856A1 (en) | 2004-09-23 | 2010-05-06 | Herman Gill | Zirconium-radiolabeled, cysteine engineered antibody conjugates |
NZ553500A (en) | 2004-09-23 | 2009-11-27 | Genentech Inc Genentech Inc | Cysteine engineered antibodies and conjugates withCysteine engineered antibodies and conjugates with a free cysteine amino acid in the heavy chain a free cysteine amino acid in the heavy chain |
AU2005294347A1 (en) * | 2004-10-05 | 2006-04-20 | Oregon Health And Science University | Compositions and methods for treating disease |
US20090170769A1 (en) * | 2005-05-13 | 2009-07-02 | Pei Jin | Cell surface receptor isoforms and methods of identifying and using the same |
WO2011008768A1 (en) | 2009-07-13 | 2011-01-20 | Wayne State University | Modified egfr ectodomain |
KR20120123299A (en) | 2009-12-04 | 2012-11-08 | 제넨테크, 인크. | Multispecific antibodies, antibody analogs, compositions, and methods |
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CA1310924C (en) | 1986-04-24 | 1992-12-01 | Francis P. Mccormick | Infective drug delivery system |
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-
2000
- 2000-05-12 WO PCT/US2000/012884 patent/WO2000069909A1/en active Application Filing
- 2000-05-12 AU AU50032/00A patent/AU5003200A/en not_active Abandoned
- 2000-05-12 US US09/570,454 patent/US6399743B1/en not_active Expired - Fee Related
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2001
- 2001-05-31 US US09/867,521 patent/US6582934B2/en not_active Expired - Fee Related
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US6582934B2 (en) | 2003-06-24 |
WO2000069909A1 (en) | 2000-11-23 |
AU5003200A (en) | 2000-12-05 |
US20020045215A1 (en) | 2002-04-18 |
US6399743B1 (en) | 2002-06-04 |
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