WO2005022116A2 - Antioxodant sensor, methods and compositions - Google Patents
Antioxodant sensor, methods and compositions Download PDFInfo
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- WO2005022116A2 WO2005022116A2 PCT/US2004/027644 US2004027644W WO2005022116A2 WO 2005022116 A2 WO2005022116 A2 WO 2005022116A2 US 2004027644 W US2004027644 W US 2004027644W WO 2005022116 A2 WO2005022116 A2 WO 2005022116A2
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- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
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- A61K31/00—Medicinal preparations containing organic active ingredients
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- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/35—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
- A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline
- A61K31/353—3,4-Dihydrobenzopyrans, e.g. chroman, catechin
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- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/35—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
- A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline
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- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/35—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
- A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline
- A61K31/353—3,4-Dihydrobenzopyrans, e.g. chroman, catechin
- A61K31/355—Tocopherols, e.g. vitamin E
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- A—HUMAN NECESSITIES
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- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/7042—Compounds having saccharide radicals and heterocyclic rings
- A61K31/7048—Compounds having saccharide radicals and heterocyclic rings having oxygen as a ring hetero atom, e.g. leucoglucosan, hesperidin, erythromycin, nystatin, digitoxin or digoxin
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- A—HUMAN NECESSITIES
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/24—Apocynaceae (Dogbane family), e.g. plumeria or periwinkle
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/82—Theaceae (Tea family), e.g. camellia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K36/00—Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
- A61K36/18—Magnoliophyta (angiosperms)
- A61K36/185—Magnoliopsida (dicotyledons)
- A61K36/87—Vitaceae or Ampelidaceae (Vine or Grape family), e.g. wine grapes, muscadine or peppervine
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P39/00—General protective or antinoxious agents
- A61P39/06—Free radical scavengers or antioxidants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/64—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by measuring electrical currents passing through the fluid flow; measuring electrical potential generated by the fluid flow, e.g. by electrochemical, contact or friction effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1806—Water biological or chemical oxygen demand (BOD or COD)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T436/00—Chemistry: analytical and immunological testing
- Y10T436/14—Heterocyclic carbon compound [i.e., O, S, N, Se, Te, as only ring hetero atom]
- Y10T436/142222—Hetero-O [e.g., ascorbic acid, etc.]
Definitions
- the present invention relates in general to the field of antioxidant sensors, and more particularly, to antioxidant sensors and methods that directly measure both hydrophilic and hydrophobic anti-oxidants.
- BACKGROUND OF THE INVENTION This application claims priority to, and is a continuation-in-part of, U.S. Patent Application Serial No. 10/648,047, filed August 26, 2004. Without limiting the scope of the invention, its background is described in connection with antioxidant sensor technology and methods for detection.
- Biological systems have developed antioxidant systems to combat the effects of radicals and other pro-oxidative species.
- An antioxidant is any substance that significantly delays or prevents oxidation of an oxidizable substrate when present at low concentrations compared to that of the oxidizable substrate.
- antioxidants such as superoxide dismutase and catalase
- Substances such as vitamin C and plant phenols are antioxidants introduced through the diet into biological systems. It has been proposed that naturally occurring levels of these substances are not adequately produced in the body or ingested in the normal diet.
- the normal diet often does not provide enough antioxidants because it is deficient in fruits and vegetables and/or the fruits and vegetables that are in the diet are depleted of their antioxidants due to modern-day processing.
- the normal diet could be improved, however, today's lifestyles and poor composition of western foods, make supplementation the most practical way to deliver the anti-oxidants required by the body.
- these assays include: TEAC, 19 F-NMR, TRAP, modified TRAP, FRAP, fluorescence-based methods, phosphomolybdenum complex detection, and the ORAC, all of which are proposed to measure some aspect of a substance's ability to quench free radical species. The following is a brief description of each method, including inherent advantages and disadvantages.
- TEAC assay Assay.
- the Trolox® Equivalent Antioxidant Capacity (TEAC) assay is based on the observation that when 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) is incubated in the presence of a peroxidase and hydrogen peroxide or in the presence of hydroxyl, peroxyl, alkoxyl, and inorganic radicals, the slightly more stable ABTS '+ radical cation is generated. From the time the ABTS, metmyoglobin, buffer, and hydrogen peroxide are added together, the absorbance of infra red radiation is measured at a wavelength of 734 nm with respect to time.
- ABTS 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulphonic acid)
- the absorbance increases.
- the antioxidants scavenge the radicals formed by the hydrogen peroxide, delaying the formation of the ABTS '+ radical cation, thus inducing an increase in the percentage of inhibition of the absorbance.
- the unit of measure in this assay is the TEAC, which is the concentration (mmol/1) of Trolox® with the equivalent antioxidant capacity to a 1.0 mmol/1 solution of the substance being tested.
- the TEAC assay detects the antioxidant capacity of water-soluble drugs or drugs that can be solubilized.
- the TEAC assay can be used to measure the antioxidant capacity of the system.
- the TEAC method can be used for pharmacological and nutritional studies. Use of the TEAC method is limited because peroxidases present in the sample yield a higher absorbance value and the chemical tested can also absorb at 734 nm. Therefore, the TEAC method cannot guarantee the specificity of the sample antioxidant to directly quench free radicals because of direct interactions between the antioxidant sample and the reagents due to the relatively low concentration of the H 2 O . The TEAC method is also affected by dilution of the sample, yielding an increase in TEAC values at lower concentrations of the sample. 19 F-NMR Assay.
- Another method uses 19 F-NMR (nuclear magnetic resonance), in which aromatic amines fluorinated with 19 F-NMR is detected.
- the aromatic amines react rapidly with hydroxyl radicals to form a mixture of hydroxylated products.
- the fluorinated detector, N-(4-hydroxyphenyl)-trifluoroacetamide is broken down by hydroxyl radical attack to yield CF 3 CONH 2 , trifluoroacetamide (TFAM), along with other products.
- TFAM trifluoroacetamide
- the area under the TFAM peak will be smaller than if the substance is poor at protecting the fluorinated detector.
- the reagents are mixed together, and a measurement is taken using NMR. The area of the peak is measured and then normalized against the total concentration of the fluorine-containing species.
- the 19 F-NMR method is a simple method that measures the antioxidant properties of low molecular weight biomolecules, however, the indicator only appears if hydroxyl radicals are involved, radioactive fluorine us used in the method and the NMR equipment is extremely expensive to purchase and operate. TRAP Assay.
- Aqueous dispersions of oxidizable organic compounds are readily and reproducibly initiated at a constant rate, R;, by peroxidation using the water-soluble azo compound 2,2'-azo-bis-(2-amidipropropane hydrochloride)(ABAP), which serves as the basis for the Total Radical-Trapping Antioxidant Parameter (TRAP) method.
- the TRAP method detects the length of time that oxygen uptake by peroxidizable plasma is inhibited with an oxygen probe, and this value is referred to as the TRAP.
- Trolox® is used as an anti-oxidant control in this method during a second induction period after the natural antioxidants have been depleted. The second induction period is used to calculate an Rj value, which is used to calculate the TRAP value.
- the TRAP value is reported as the number of moles of peroxyl radicals trapped per liter of fluid.
- the duration of time is the only thing measured in the TRAP method, limiting its usefulness for high throughput analysis.
- the time taken to prevent maximum oxygen uptake cannot be measured easily and precisely, the total radical trapping capability per mole of some antioxidants is dependent on their initial concentration; and the actual extent of inhibition is not measured.
- the TRAP method is time consuming because, with only one reaction vessel, there can only be one sample tested at a time. While the TRAP method is more specific than the TEAC method because the TRAP method requires high levels of dilution of plasma to produce the required lag phase, and the process to accomplish this shortens the lipid chain length necessary for a rapid chain reaction.
- the modified TRAP method indirectly measures the effect of peroxyl radical attack produced by ABAP on the fluorescent properties of the protein ⁇ -phycoerythrin ( ⁇ -PE) and the ability of plasma to protect ⁇ -PE. Protection is accomplished by precipitating the protein out of plasma with ammonium sulfate and ulfracentrifugation.
- the modified TRAP assay is performed by adding the reagents together into the quartz fluorometer cells and kept at 37°C for 5 minutes. After the ABAP is added, fluorescence is measured at 495 nm and monitored every 5 minutes.
- the modified TRAP method produces a linear decrease in fluorescence due to the thermal decomposition of ABAP like the original oxygen probe-based method.
- a period of total protection is indicated by a lag phase upon the addition of any antioxidant compound, however, it is assumed that the total plasma antioxidant capacity is directly related to the length of the lag phase.
- the TRAP is quantified by comparing the lag phase produced by the antioxidant compound to the lag phase produced by a Trolox® solution of known concentration.
- the modified TRAP method does not measure the ability of plasma to break the lipid peroxidation chain triggered by ABAP, but it is not fully defined whether and to what extent lipid-soluble antioxidants are involved in TRAP. This modified TRAP method can only handle four to eight plasma samples at a time. FRAP Assay.
- the Ferric Reducing Ability of Plasma (FRAP) assay was developed by Benzie and Strain and published in 1996, and is carried out on a COBAS FARA II spectorphotometric analyzer.
- FRAP reagent along with all solutions are freshly prepared each day.
- the FRAP reagent is heated to 37° C.
- a blank reading is taken, and then an antioxidant sample and water are added.
- Starting 0.5 seconds after the reaction is initiated readings are taken every 15 seconds for the duration of the experiment.
- the change in absorbance measurement from the blank to that of the final measurement is calculated and then related to the change in absorbance of a standard iron(II) solution that is tested in parallel.
- the FRAP assay is not concentration- dependent, showing no deviation from the expected linear trend of the results going through the origin.
- the FRAP assay has certain known problems, namely, there are no free radicals introduced into the system.
- the FRAP assay uses an oxidation/reduction reaction to measure the ability of a sample to reduce iron(III) to iron(II).
- An antioxidant donates electrons in the same manner as a reductant in an oxidation/reductions, so it is assumed that the FRAP assay is a method for evaluating antioxidant capacity.
- the FRAP assay does not directly measure the antioxidant capacity of a potential antioxidant. Also, since there are no free radicals introduced into the system, there is no way of comparing the antioxidant capacity towards different kinds of radicals.
- the FRAP assay cannot measure the antioxidant capacity of certain antioxidants accurately such as ascorbic acid, which can react with iron(II) and SH group-containing antioxidants.
- the FRAP assay does not take into account the quantity of inhibition; thus, FRAP leaves out an important component of the total antioxidant capacity.
- the inability of the FRAP and TEAC assays to accurately determine the antioxidant capacity is evident upon comparison of results from the two assays where there is no linear correlation.
- Fluorescence-Based Methods The Fluorescence-Based method is based on the discovery that the fluorescence of ⁇ -phycoerythrin changes with respect to time upon damage caused by peroxyl and hydroxyl radical attack.
- the ⁇ -phycoerythrin method uses a Perkin-Elmer MPF 44B fluorescence spectrophotometer to detect the fluorescence.
- a fluorescence measurement is given with respect to time and is used to determine the amount of protection that an antioxidant provides by observing how long there is a "flat period" with respect to a control.
- fluorescence-based methods if the level of absorbance stays the same, the "flat period" for a longer period of time for chemical A than it does for chemical B, then chemical A is said to protect from radical attack better than compound B and is therefore a stronger antioxidant.
- the fluorescence method provides a method for quantitating the level of non-serum antioxidants in plasma or other biological fluids rapidly on small samples and has been used to analyze the antioxidant potential of plasma, proteins, DNA, neurotransmitters and related substances, vitamins and their derivatives, and other chemicals.
- the indirect fluorescence method contains some problems. For example, these assays measure the inhibition percent calculated from the initial linear rate of fluorescence loss instead of accounting for the inhibition time of, e.g., ⁇ -PE.
- the fluorescence method offers neither a way to determine the contribution of lipid-soluble antioxidants, nor to determine the contribution of protein in serum to the total antioxidant capacity.
- PCA Phosphomolybdenum Complex Assay
- the formation of a phosphomolybdenum complex is similar to the FRAP method.
- the PCA method is based on the change in the absorbance after the reduction of molybdenum(VI) to molybdenum(V).
- a reducing species e.g., an antioxidant.
- Samples are prepared just before use by dissolution in the appropriate solvent. For water-soluble compounds, water is used. For substances soluble in organic solvents, ethanol, methanol, dimethyl sulfoxide, or hexane is used with exact concentrations determined from literature-based absorption coefficients. After being ground and frozen, seed samples are dissolved, and an extraction is performed if necessary.
- a sample is then mixed with the molybdenum-containing reagent solution. After a period of incubation and cooling, an absorbance measurement is taken against a blank using, e.g., a UV-visible spectrophotometer.
- organic and water-soluble antioxidant capacities are expressed as equivalents of ⁇ -tocopherol and ascorbic acid, respectively.
- the antioxidant capacity is quantified on the basis of comparison of the molar absorption coefficient of the phosphomolybdenum complex. The closer the molar absorption coefficient is to one, the better the antioxidant.
- the phosphomolybdenum method is a good, simple method for determining the antioxidant potential of stronger antioxidants such as vitamin E from 25-37°C.
- the Oxygen-Radical Absorbance Capacity (ORAC) methods use the chemical properties of phycoerythrins, fluorescing proteins.
- the ORAC assay differs from the Glazer method in that the reaction is driven to completion in the ORAC method while, as stated earlier, the Glazer method looks at what is reported as the flat period.
- the ORAC method can use serum with proteins removed by treatment with ammonium sulfate, followed by ulfracentrifugation.
- the peroxyl radical generator, 2,2'- azobis(2-amidinopropane)dihydrochloride (AAPH) is used in this assay.
- ORAC value refers to the net protection area under the quenching curve of ⁇ -PE in the presence of an antioxidant.
- the ORAC value is calculated by dividing the area under the sample curve by the area under the Trolox® curve with both areas being corrected by subtracting the area under the blank curve.
- One ORAC unit is assigned as being the net protection area provided by 1 ⁇ M Trolox® in final concentration.
- An automated ORAC method uses, e.g., a COBAS FARA II centrifugal analyzer. After the initiator is added, fluorescence measurements were taken after 0.5 seconds and then every 2 minutes following the initial reading.
- the COBAS FARA II is equipped with a centrifuge which allows for spinning and mixing of samples.
- the COBAS FARA II is able to handle up to 30 samples at one time and the results are reported using the area under the curve to determine the ORAC value as they were in the original method.
- the COBAS FARA II method has been used effectively to evaluate several sample matrices.
- the ORAC may be further modified by using a fluorescein salt instead of ⁇ - phycoerythrin.
- ⁇ -phycoerythrin is approximately 30% pure due to the isolation process and is inconsistent from lot to lot. It was determined that due to variable reactivity to peroxyl radicals, ⁇ -phycoerythrin also produces an inconsistency from lot to lot. Also, ⁇ - phycoerythrin can be photobleached after exposure to excitation light for a certain time. Due to nonspecific protein binding, ⁇ -phycoerythrin interacts with polyphenols which affects stability. Also, ⁇ -phycoerythrin is also much more expensive than fluorescein.
- the ORAC method was adapted to be able to analyze the lipid-soluble antioxidant samples by introducing randomly methylated beta-cyclodextrin (RMCD) in 50% acetone- water mixture. This acetone: water mixture made lipid-soluble antioxidants soluble in phosphate buffer.
- RMCD randomly methylated beta-cyclodextrin
- the ORAC method is a simple, sensitive, and reliable way to measure the peroxyl radical absorbing capacity of antioxidants and serum or other biological fluids. Hydroxyl radical absorbing capacity of serum has been performed successfully using the ORAC method.
- the ORAC(fl) method can be used with a fluorometry microplate reader using a 96-well plate to perform simultaneous kinetic analysis of many samples and to reduce the amount of serum sample required.
- the ORAC method is unique in its analysis in that it takes into account the inhibition time and degree of inhibition into a single quantity by measuring the area under the curve.9
- the ORAC method is not affected by dilution.5
- a comparison was run with the COBAS FARA II automated assay using ⁇ - phycoerythrin with the FRAP and TEAC assays, and there was no linear correlation between the ORAC and the TEAC, further indicating the inability of the TEAC assay to accurately determine the antioxidant capacity of a sample.
- a sensitive and rapid electrochemical sensor monitors motor oil deterioration, particularly antioxidation property, by determining the antioxidant and antiwear agent level remaining in an oil formulation.
- the electrochemical sensor is a two- or three-electrode electrochemical cell having a conductive electrolyte liquid or gel-like interphase over the electrode surfaces. The degree of deterioration of motor oil is monitored by measurements of antioxidation or antiwear capacity of the oil.
- the electrochemical sensor is used for monitoring other lubricants and hydrocarbons which contain electroactive additives.
- the electrochemical sensor allows measurements to be performed in-situ, without any chemical or physical pretreatment of the oil. Another example of an antioxidant sensor is shown in U.S. Patent No.
- 6,638,415 issued to Hodges, which discloses a device and method for measuring the level of an oxidant or antioxidant analyte in a fluid sample.
- the device includes a disposable electrochemical cell, such as a thin layer electrochemical cell, containing a reagent capable of undergoing a redox reaction with the analyte.
- a reagent capable of undergoing a redox reaction with the analyte.
- heat may be applied to the sample by a resistive heating element in the device or by an exothermic material contained within the electrochemical cell. The application of heat is taught to accelerate the rate of the redox reaction between the reagent and the analyte, which facilitates the electrochemical measurement of slow- reacting analytes.
- a selective method for measuring lipid antioxidant activity within a lipid compartment of a sample using lipophilic radical generators and oxidizable lipophilic indicators is disclosed.
- the invention is said to accurately and efficiently determine the total antioxidant activity of a sample in both lipid and aqueous compartments.
- the methods of the invention can be used for diagnosing and protecting against disorders that arise from excess free radicals present in a subject.
- the reagents used in the methods of the invention can also be provided in a kit assay. However, the Oxygen Radical Absorbance Capacity (ORAC) value is measured indirectly using standard fluorescent probes.
- the present invention includes antioxidant sensors and methods that measure directly total sample oxidation levels and the effect of anti-oxidants on total sample oxidation state.
- the invention also includes compositions and methods that are useful for providing effective amounts of anti-oxidants to an individual for optimal health.
- the apparatus and method disclosed herein detect the total anti-oxidant capacity of a sample, concurrently and directly in real-time.
- the present inventors recognized that the art has artificially created two mutually exclusive categories of anti-oxidants (lipophilic and lipophobic) and has measured them separately. Furthermore, the art has also generally measured the existence of the radicals indirectly, that is, using a detectable reporter molecule.
- the present invention overcomes the limitations in prior art detectors and methods by using a rapid, inexpensive and direct detection system.
- the present inventors developed the Oxygen Radical Absorbance Capacity-Oxygen (ORAC(o)) apparatus and method disclosed herein.
- ORAC(o) Oxygen Radical Absorbance Capacity-Oxygen
- the present inventors were able to measure, for the first time, the effect of both the effect of both lipophilic and lipophobic anti-oxidants on dissolved oxygen levels, concurrently and in real-time.
- the inventors were also able to develop a synergistic anti-oxidant composition, which may be used alone or in combination with one or more anti-oxidant potentiators.
- the present invention includes an apparatus for detecting directly the antioxidant activity of both lipophilic and lipophobic anti-oxidants that includes a dissolved oxygen sensor in fluid communication with a sample and an oxygen radical sensitive molecule in a solvent/water/surfactant mixture; wherein the oxygen radical sensitive sensor concurrently detects both lipophilic and lipophobic anti-oxidants in the solvent/water/surfactant mixture.
- the oxygen radical sensitive molecule may be molecules that will react with oxygen, e.g., molecules with conjugated double bonds; or Nitrogen or Sulfur containing compounds.
- oxygen radical sensitive molecule e.g., fluorescein, ⁇ -Phycoerythrin ( ⁇ -PE), glutathione-S-transferase, linoleic acid or combinations thereof.
- the oxygen radical level is determined directly using a dissolved oxygen meter or sensor in a solvent/water/surfactant mixture.
- the level of dissolved oxygen may be determined using an oxygen sensor, e.g., an electrochemical, a chemiluminescent, a surface plasmon resonance, an infrared, a capacitance coupled, a dye- coupled fiber optic or a hyperspectral oxygen sensor.
- the dissolved oxygen meter or sensor may be placed in-line for high-throughput analysis, may be a single sample detector and/or be adapted for office or even home use.
- the solvent may be an organic solvent, e.g., acetone.
- the surfactant may be a detergent, e.g., a non-ionic detergent such as Tween-20.
- the solvent in the solvent/water/surfactant mixture is generally at least about 10 to 90 percent in volume of the solvent/water/surfactant mixture, e.g., 33%.
- the water in the solvent/water/surfactant mixture is generally at least about 10 to 90 percent in volume of the solvent/water/surfactant mixture, e.g., 33 to 67%.
- the surfactant (or detergent) in the solvent/water/surfactant mixture is at least about 0.1 to 10 percent in volume of the solvent/water/surfactant mixture and may be stored dissolved in water. In one specific example, the solvent/water/surfactant ratio is about 1:1:1.
- the apparatus may further include one or more processors, e.g., a computer that may: control the detector, capture data, store data, perform calculations based on the data and/or a database of information, and/or display the data or summaries of the data in the form of tables, graphs, charts and the like.
- the processor/computer may also be connected and even control a fluidic system that is in fluid communication with the oxygen sensor and the solvent/water/ detergent mixture.
- the present invention measures an area under the curve that relates the relative disappearance of oxygen that results from the activity of the sample being tested for anti-oxidant capacity to the relative disappearance of oxygen observed as a result of the activity of a known standard.
- the level of dissolved oxygen is measured directly in the solution that include both lipophilic and lipophobic anti-oxidants, concurrently.
- An examples of the formula for calculating the AUC may be:
- AUC SM p is the area under the curve value of the sample; wherein AUC B NK is the area under the curve value of the blank; wherein AUC TRLX is the area under the curve value for Trolox®; and wherein SMP is the sample.
- the present invention also includes a method of determining directly the antioxidant activity including the steps of: determining the dissolved oxygen level in a test solution dissolved in a solvent/water/surfactant mixture in the presence of one or more anti-oxidants and an oxygen radical target, wherein both aqueous and lipid soluble antioxidant activity is measured with an oxygen detector.
- the dissolved oxygen radical level may be determined using an oxygen detector, e.g., electrochemical, chemiluminescent, surface plasmon resonance, capacitance coupled, a dye-coupled fiber optic or a hyperspectral oxygen sensor.
- the anti-oxidant activity may be measured at about 37 degrees Centigrade.
- radical intiators include, e.g., 2,2'-azobis[2-(5-methyl-2- imidazolin-2-yl)propane]dihydrochloride, 2,2' azobis (2-amidinopropane)dihydrochloride (AAPH), 2,2'-azobis(2-amidinopropane)[2-(N-stearyl)amidinopropane] dihydrochloride (SA-1), 2,2'-azo(2-(2-imidiazolin-2-yl)-propane)-[2-[2-(4-n-octyl)imidazolin-2-yl]- propane] dihydrochloride (C-8), 2,2'-azobis(4-methoxy-2,4-dimethylvaleronitrile) (MeO- AMVN), 2,2'-azobis(2,4-dimethylvaleronitrile) (AMVN), azo-bis-isobutylnitrile, 2,2'- azo
- the detector may even be disposable.
- the present invention also includes a dietary supplement that includes any isolated and purified lipophobic anti-oxidant and any isolated and purified lipophilic anti-oxidant, wherein the lipophobic and the lipophilic antioxidants combined have a dissolved oxygen value of greater than 6,000 ⁇ Mol Trolox® Equivalents (TE)/gram.
- TE Trolox® Equivalents
- the lipophobic and the lipophilic anti-oxidant are time-released and may include one or more vitamin E selected from alpha, beta, delta, epsilon, gamma, zeta, eta, xil, xi2, and sigma tocopherols, and alpha, beta, delta and gamma tocotrienols, analogs thereof, pharmaceutically acceptable salts thereof, and combinations thereof.
- vitamins E selected from alpha, beta, delta, epsilon, gamma, zeta, eta, xil, xi2, and sigma tocopherols, and alpha, beta, delta and gamma tocotrienols, analogs thereof, pharmaceutically acceptable salts thereof, and combinations thereof.
- lipophilic anti-oxidants include quercetin, kaempferol, myricetin, apigenin and derivates, analogs, pharmaceutically acceptable salts thereof, and combinations thereof.
- the dietary supplement that includes any isolated and purified lipophobic antioxidant and any isolated and purified lipophilic anti-oxidant may also include two or more essential saccharide, e.g., galactose, galactosamine, glucosamine, glucose, mannose, acetylated-mannose, N-acetylneuraminic acid, fucose, N-acetylgalactosamine, N- acetylglucosamine and/or xylose.
- the supplement also includes source of vitamin C, e.g., a plant source with a high level of natural, bioavailable vitamin C such as an Australian bush plum (Terminalia ferdinandiana).
- the Vitamin C is a potentiator of anti-oxidant activity from a plant source of vitamin C such as wild- Australian bush plum (Terminalia ferdinandiana), which has a higher percentage of Vitamin C than farm grown bush plum.
- the supplement may also include one or more pro-biotics, e.g., Lactobacillus sp. and Bifidobacterium sp.
- the supplement may be compressed to provide a generally oxygen impermeable surface, e.g., a roller-compressed particle, a capsule, a tablet, a mini-tab, a caplet, an effervescent tablet or combinations thereof.
- the isolated and purified lipophilic and lipophobic anti-oxidants will have an anti-oxidant ORAC(fl-lipo) value greater than 7000 ⁇ Mol Trolox® Equivalents (TE)/gram.
- the present invention was used in an open label study to measure the change in antioxidant levels in each individual taking an anti-oxidant/glyconutrient blend that included the anti-oxidants of the present invention in their diets.
- the lipophobic and the lipophilic antioxidants provided an average increase of over 13% as measured by ORAC( ⁇ -PE) from the cumulative patient population's average baseline antioxidant level.
- the present invention also includes a number of compositions.
- compositions disclosed herein are based on the recognition that dietary supplements available currently fail to combine lipophilic and lipophobic anti-oxidants with measurable activities above those expected from the individual components.
- the present inventors were able to develop synergistic combinations of not only lipophilic and lipophobic anti-oxidants, but also add potentiators of the antioxidant activity.
- Flavonoids like quercetin have recently been shown to increase the transcription of the heavy subunit of the rate-limiting enzyme in glutathione synthesis, gamma- glutamylcysteine synthetase, through the gene's antioxidant responsive elements. The increased transcription is subsequently translated in increased intracellular levels of reduced (active) glutathione in tissue culture cells.
- Quercetin is a major component of red wine, grape skin, and onions. Studies of quercetin from red wine, grape skin, and onions suggest beneficial effects upon health. Quercetin has been shown to be well absorbed by humans. One study showed that all ingested quercetin was metabolized two hours following a meal (European Research on Functional Effects of Dietary Antioxidants,
- the predominant form of vitamin E in the North American diet is garnma- tocopherol, which is commonly found in vegetable oils as well as products derived form soybeans and corn.
- the body predominantly retains alpha-tocopherol.
- a specific method, leaning on alpha-tocopherol transfer protein has been found to regulate the concentration of alpha-tocopherol in the body.
- the present invention uses mixed tocopherols to provide the body with many forms of vitamin E, allowing for the selection, retention and use of the optimal amounts of each form.
- the synergistic combination of quercetin and mixed tocopherols provides the body with a wide array of antioxidant nutrients optimal selection, which may differ based upon an individual ' s needs .
- the present inventors sought to maximize further the activity of the synergistic quercetin and mixed tocopherol combination by adding compounds that help potentiate the activity of these anti-oxidants.
- One such potentiator is Vitamin C.
- Vitamin C has significant antioxidant activity attributed to it as well as several non-antioxidant nutritive functions. Many attribute pro-oxidant properties to vitamin C, especially in the presence of transition metals. The pro-oxidant properties of vitamin C may not be entirely destructive. However, other researchers assert that they found that vitamin C behaves as an antioxidant, even in the presence of unbound metals.
- potentiators of anti-oxidant activity include natural extracts, such as grape seed extract and green tea extract.
- green tea exhibited potent antimutagenic activity in vitro and inhibited the development of carcinogen-induced preneoplastic lesions in the rat colon.
- Green tea also significantly inhibited the formation of intestinal polyps. Therefore, the present inventors combined not only a synergistic combination of purified and isolated anti-oxidants from natural sources, such as quercetin and mixed tocopherols, but further added potentiators that increased the detectable anti-oxidant activity of these agents.
- compositions a dietary supplement that includes a nutritionally effective amount of two or more essential saccharides; an isolated and purified lipophobic oxygen-radical quencher; and an isolated and purified lipophilic oxygen-radical quencher, wherein the lipophobic and the lipophilic oxygen-radical quenchers combined have an oxygen-radical quencher value of greater than 6,000 ⁇ Mol Trolox® Equivalents (TE)/gram.
- the lipophobic and the lipophilic oxygen-radical quencher when provided to a patient provide an average increase of over 13% as measured by ORAC(fl- lipo) from the patient population's baseline antioxidant level.
- the lipophobic and the lipophilic oxygen-radical quencher are packaged for extended-release, and may include one or more of the following vitamin E molecules: alpha, beta, delta, epsilon, gamma, zeta, eta, xil, xi2, and sigma tocopherols, and alpha, beta, delta and gamma tocotrienols, analogs thereof, pharmaceutically acceptable salts thereof, and combinations thereof.
- the lipophilic oxygen-radical quencher may include one or more of the following: flavonols, quercetin, kaempferol, myricetin, apigenin and derivates, analogs, pharmaceutically acceptable salts thereof, and combinations thereof.
- the supplement may further include two or more saccharides selected from the group consisting of galactose, glucose, mannose, N-acetylneuraminic acid, fucose, N-acetylgalactosamine, N-acetylglucosamine and xylose, derivates, analogs, pharmaceutically acceptable salts thereof, and combinations thereof.
- saccharides selected from the group consisting of galactose, glucose, mannose, N-acetylneuraminic acid, fucose, N-acetylgalactosamine, N-acetylglucosamine and xylose, derivates, analogs, pharmaceutically acceptable salts thereof, and combinations thereof.
- FIG. 3 are two graphs that compare the blank solution in an ORAC(o) (percent oxygen) with the ORAC(fl) (fluorescence) measurements using AAPH an initiator, Trolox® as the standard and linoleic acid or fluorescein, respectively as the oxygen radical targets;
- FIG. 4 are two graphs that compare the anti-oxidant standard Trolox® in an ORAC(o) (percent oxygen) with the ORAC(fl) (fluorescence) measurements using AAPH an initiator, Trolox® as the standard and linoleic acid or fluorescein, respectively as the oxygen radical targets;
- FIG. 4 are two graphs that compare the anti-oxidant standard Trolox® in an ORAC(o) (percent oxygen) with the ORAC(fl) (fluorescence) measurements using AAPH an initiator, Trolox® as the standard and linoleic acid or fluorescein, respectively as the oxygen radical targets;
- FIG. 4 are two graphs that compare the anti-oxidant standard Trolox
- FIG. 5 are two graphs that compare the blank solution, the standard and the sample, in an ORAC(o) (percent oxygen) with the ORAC(fl) (fluorescence) measurements using AAPH as an initiator, Trolox® as the standard and linoleic acid or fluorescein, respectively as the oxygen radical targets;
- FIG. 5 are two graphs that compare the blank solution, the standard and the sample, in an ORAC(o) (percent oxygen) with the ORAC(fl) (fluorescence) measurements using AAPH as an initiator, Trolox® as the standard and linoleic acid or fluorescein, respectively as the oxygen radical targets;
- FIG. 5 are two graphs that compare the blank solution, the standard and the sample, in an ORAC(o) (percent oxygen) with the ORAC(fl) (fluorescence) measurements using AAPH as an initiator, Trolox® as the standard and linoleic acid or fluorescein, respectively as the oxygen radical targets;
- FIG. 5 are two
- FIG. 6 is a graph that shows an antioxidant effect of the combination of quercetin (Q) at 5 ⁇ g/mL and mixed tocopherols (MT) at 5 ⁇ g/mL as compared to each ingredient separately at a concentration of 10 ⁇ g/mL as measured by the ORAC(o) method of the present invention
- FIG. 7 is a graph that shows an antioxidant effect of the combination of quercetin (Q) at 5 ⁇ g/mL and mixed tocopherols (MT) at 5 ⁇ g/mL, and Trolox® as a control measured by the ORAC(o) method of the present invention
- FIG. 8 is a graph of the Area Under the Curve (AUC) results from titrated ratio of quercetin and mixed tocopherols using the ORAC(o) method to measure antioxidant capacity
- FIG. 9 is another graph of AUC results from titrated ratio of quercetin and mixed tocopherols using the ORAC(o) method to measure antioxidant capacity that demonstrated the expected results (line) and the extent of synergy detected above the line as compared to the expected results from titration of the quercetin and mixed tocopherols
- FIG. 9 is another graph of AUC results from titrated ratio of quercetin and mixed tocopherols using the ORAC(o) method to measure antioxidant capacity that demonstrated the expected results (line) and the extent of synergy detected above the line as compared to the expected results from titration of the quercetin and mixed tocopherols
- FIG. 10 is a graph that shows the results from ORAC(o) assays for varying ratios of grape skin extract and green tea extract in the presence of 49.18%) quercetin, 32.79% mixed tocopherols, and 1.64% bush plum.
- the optimal ratio of grape skin extract to green tea extract is 60/40 to 80/20;
- FIG. 11 is a graph that shows ORAC(fT) results of the combination of quercetin (Q) at 5 ⁇ g/mL and mixed tocopherols (MT) at 5 ⁇ g/mL as compared to each ingredient separately at a concentration of 10 ⁇ g/mL.
- FIG. 10 is a graph that shows the results from ORAC(o) assays for varying ratios of grape skin extract and green tea extract in the presence of 49.18%) quercetin, 32.79% mixed tocopherols, and 1.64% bush plum.
- the optimal ratio of grape skin extract to green tea extract is 60/40 to 80/20
- FIG. 11 is a
- FIG. 12 is a graph of an ORAC(fl) assay measuring a titration of quercetin versus ⁇ - tocopherol dissolved in acetone:water
- FIG. 13 is a graph of an ORAC(fl) assay measuring the anti-oxidant activity measured for a fixed ratio of quercetin: ⁇ -tocopherol ratio dissolved in a solvent:water:detergent mixture
- FIG. 14 is a graph of an ORAC(fl) assay measuring the anti-oxidant activity measured for a fixed ratio of quercetim ⁇ -tocopherol ratio dissolved in two different rations of solven water to detergent mixtures
- FIG. 15 is a graph showing the ORAC(o) values obtained with different ratios of quercetin and mixed tocopherols
- FIG. 16 is a graph showing the ORAC(o) values for different ration of grape seed extract and green tea extract
- FIG. 17 is a graph that shows the ORAC(o) values of the combination of the maximum quercetimmixed tocopherol and the grape seed extract and green tea extract ratios.
- the art has also generally measured the existence of the radicals indirectly, that is, using a reporter molecule.
- the present invention provides an apparatus and method that not only detects the total anti-oxidant capacity of a sample, concurrently, but does so directly.
- the "antioxidant” refers to any molecule that delays or prevents the oxidation of an oxidizable target molecule. Antioxidants act by: scavenging biologically important reactive free radicals or other reactive oxygen species (e.g., O 2 " , H 2 O 2 , HOC1, ferryl, peroxyl, peroxynitrite, and alkoxyl); preventing oxygen radical formation; or catalytically converting the free radical or other reactive oxygen species to a less reactive species.
- biologically important reactive free radicals or other reactive oxygen species e.g., O 2 " , H 2 O 2 , HOC1, ferryl, peroxyl, peroxynitrite, and alkoxyl
- Antioxidants are generally divided into two classes: (1) lipid (lipophilic or hydrophobic) antioxidants; and (2) aqueous (lipophobic or hydrophilic) antioxidants.
- lipid antioxidants include, but are not limited to, carotenoids (e.g., lutein, zeaxanthin, ⁇ -cryptoxanthin, lycopene, ⁇ -carotene, and ⁇ -carotene), which are located in the core lipid compartment, and tocopherols (e.g., vitamin E, ⁇ -tocopherol, ⁇ -tocopherol, and ⁇ -tocopherol), which are located in the interface of the lipid compartment, and retinoids (e.g., vitamin A, retinol, and retinyl palmitate) and fat-soluble polyphenols, e.g., quercetin.
- carotenoids e.g., lutein, zeaxanthin, ⁇ -cryptoxanthin,
- aqueous antioxidants include, but are not limited to, ascorbic acid and its oxidized form, "dehydroascorbic acid,” uric acid and its oxidized form “allantoin,” bilirubin, albumin and vitamin C and water-soluble polyphenols such as catechins, which have high affinity to the phospholipid membranes, isoflavones and procyanidins.
- ORAC Oxygen Radical Absorbance Capacity
- the anti-oxidant value is measured indirectly by measuring the effect of an oxygen radical on, e.g., a fluorescent or other detectable molecule, that may of may not be a good target for oxidation by the particular oxygen radical.
- an oxygen radical e.g., a fluorescent or other detectable molecule
- a detectable decrease in the amount of a free radical, such as superoxide, or a non-radical reactive oxygen species, such as hydrogen peroxide may be seen in the sample, compared with a sample untreated with the antioxidant (i.e., control sample).
- Free radicals may be electrically charged or neutral, are highly reactive and usually shortlived. Free radicals combine with one another or with atoms that have unpaired electrons. In reactions with intact molecules, free radicals try to complete their own electronic structure, generating new radicals, which go on to react with other molecules creating a chain reaction. Free radical chain reactions are particularly important in decomposition of substances at high temperatures and in polymerization. In the body, oxidized free radicals are responsible for damage tissues. Heat, ultraviolet light, and ionizing radiation all generate free radicals. Free radicals are generated as a secondary effect of oxidative metabolism. An excess of free radicals can overwhelm the natural protective enzymes such as superoxide dismutase, catalase, and peroxidase.
- Free radicals such as hydrogen peroxide (H O 2 ), hydroxyl radical (HO), singlet oxygen ( 1 O ), superoxide anion radical (0_ ⁇ ), nitric oxide radical (NO), peroxyl radical (ROO), peroxynitrite (ONOO " ) can be in either the lipid or aqueous compartments.
- Antioxidant nutrients e.g., vitamins C and E, selenium, polyphenols
- lipid compartment refers to compounds that have cyclic or acyclic long-chain aliphatic hydrocarbons and their derivatives, such as fatty acids, alcohols, amines, amino alcohols and aldehydes.
- common lipids include fatty acids, fats, phospholipids, steroids, eicosanoids, waxes and fat-soluble vitamins.
- Some lipids may be generally classified into two groups, the simple lipids and the complex lipids, e.g., triglycerides or fats and oils, fatty acid esters of glycerol, waxes, fatty acid esters of long-chain alcohols and steroids such as cholesterol and ergosterol.
- Complex lipids include, e.g., phosphatides or phospholipids (phosphorous containing lipids), glycolipids (carbohydrate containing lipids), and sphingolipids (sphingosine containing lipids).
- lipid includes fats or fat-like substances. The term is descriptive rather than a chemical name such as protein or carbohydrate. Lipids include true fats (i.e., esters of fatty acids and glycerol), lipoids (i.e., phospholipids, cerebrosides, waxes) and sterols (i.e., cholesterol, ergostrol). Lipids can be a target of oxidation through mechanisms, such as autoxidation.
- fatty acid refers to a group of, e.g., negatively charged, generally linear hydrocarbon chains. The hydrocarbon chains of fatty acids vary in length and oxidation states.
- fatty acids have a negatively charged portion (e.g., at the carboxyl end), and a "tail" portion, which determines the water solubility and amphipathic characteristics of the fatty acid.
- fatty acids are components of the phospholipids that include biological membranes, as fats, which are used to store energy inside cells, or for transporting fat in the bloodstream.
- phospholipid refers to any of the class of esters of phosphoric acid that include at least one of the following side-groups: a fatty acid, an alcohol and a nitrogenous base.
- fat refers to any of the glyceryl esters of fatty acids, e.g., the monoacylglycerol, diacylglycerol and triacylglycerol forms of fatty acids.
- Triglycerides refer to those molecules that are neutrally charged and entirely hydrophobic, i.e., reduced molecules.
- Monoacylglycerides and diacylglycerides are metabolic intermediates in phospholipid synthesis, while triglycerides form the fat molecules that are used to store chemical energy in a water free, compact state.
- fat- soluble vitamins refers to, e.g., common fat-soluble vitamins include vitamin (A) (retinol), Vitamin D (e.g., vitamin D3 (cholecalciferol)), Vitamin E, Vitamin K and the like.
- vitamin (A) retinol
- Vitamin D e.g., vitamin D3 (cholecalciferol)
- Vitamin E Vitamin K
- lipid antioxidant activity or “lipid antioxidant capacity” are used interchangeably and refer to the measurement of antioxidant ability arising from the lipid compartment of a sample.
- aqueous antioxidant activity or “aqueous antioxidant capacity” are used interchangeably and refer to the measurement of antioxidant ability arising from the aqueous compartment of a sample.
- total antioxidant activity or “total antioxidant capacity” are used interchangeably and refer to the measurement of antioxidant ability arising from both the lipid and aqueous portions of a sample.
- aqueous compartment refers the portion of a fluid sample that does not interact with the lipid compartment.
- the aqueous compartment includes biologic fluid samples such as blood, plasma, serum, feces, cerebral spinal fluid, amniotic fluid, interstitial fluid, lymphatic fluid and synovial fluid.
- the aqueous compartment of a fluid sample such as serum may include not only the liquid portion that remains after blood has been allowed to clot and is centrifuged to remove the blood cells and clotting elements, but also other compounds such as: proteins, e.g., albumin and globulins; antibodies; enzymes; small amounts of nutritive organic materials, such as amino acids and glucose; inorganic substances such as sodium, chloride, sulfates, phosphates, calcium, potassium, bicarbonate, magnesium, iodine, zinc, and iron; small amounts of waste products, such as urea, uric acid, xanthine, creatinine, creatine, bile pigments and ammonia; and trace amounts of gases such as oxygen and carbon dioxide.
- proteins e.g., albumin and globulins
- antibodies enzymes
- small amounts of nutritive organic materials such as amino acids and glucose
- inorganic substances such as sodium, chloride, sulfates, phosphates, calcium, potassium
- the fluid sample may also be a non-biological sample, for example, chemical formulations, synthetic compositions, or food products and cosmetic products.
- sample refers to a liquid or fluid biological sample, or a solid biological sample in which free radicals can be generated using a free radical generator, (e.g., a lipophilic free radical generator or an hydrophilic free radical generator) and can be detected using the (ORAC(o)) detector and method of the present invention.
- Biological samples include, e.g., blood, plasma, serum, cerebral spinal fluid, urine, amniotic fluid, interstital fluid, and synovial fluid.
- Solid biological samples include, e.g., a tissue, cells, tissue culture, fixed cells, cell supernatants, or even portions (or extracts) of tissue or cell matter.
- sample also includes non-biological samples such as a chemical solution, synthetic composition, and food.
- relative ORAC(o) and “ORAC(o)” refer to the same value, which is measured by equivalence to micro-moles of Trolox® per gram or milliliter.
- a negative value ORAC(o) reflects less radical quenching activity than obtained with a blank which indicates that a composition is a pro-oxidant, i.e., an agent that promotes oxidation, rather than acting as an antioxidant.
- radical generator or “radical initiator” are used interchangeably and refer to an agent, compound or molecule that produces free radicals.
- the radical generator is capable of producing free radicals at a measured level, for example, at a level at which antioxidants or oxidizable indicators can interact with the free radicals to produce a measurable or detectable output.
- radical generators include, e.g., azo radical generators, which are compounds that produce a flux of free radicals at a known constant rate.
- azo radical generators examples include, e.g., 2,2'- azobis(4-methoxy-2,4-dimethylvaleronitrile) (MeO-AMVN), 2,2'-azobis(2,4- dimethylvaleronitrile) (AMVN), azo-bis-isobutylnitrile, 2,2'-azobis (2-methylproprionate) (DAMP), and 2,2'-azobis-(2-amidinopropane), 2,2'-azobis[2-(5-methyl-2-imidazolin-2 yl)propane]dihydrochloride, iron, ascorbic acid and metal ions.
- the "subject” refers to any living organism.
- the term subject includes, e.g., fish, mammals, reptiles, birds, insects and the like. Specific examples include: humans, non-human primates such as chimpanzees and other apes and monkey species; farm animals such as cattle, sheep, pigs, goats and horses; domestic mammals such as dogs and cats; laboratory animals including rodents such as mice, rats and guinea pigs, and the like.
- the term does not denote a particular age or sex. Thus, adult and newborn subjects, as well as fetuses, whether male or female, are intended to be covered.
- the phrase "free radical associated disorder” refers to a pathological condition of from the production of or exposure to free radicals.
- free radical associated disorder includes pathological states where damage from free radicals contributes to the pathology of the disease state, or wherein administration of a free radical inhibitor (e.g., desferrioxamine), scavenger (e.g., tocopherol, glutathione), or catalyst (e.g., SOD, catalase) are shown to produce a detectable benefit by decreasing symptoms, increasing survival, or providing other detectable clinical benefits in protecting or preventing the pathological state.
- a free radical inhibitor e.g., desferrioxamine
- scavenger e.g., tocopherol, glutathione
- catalyst e.g., SOD, catalase
- free radical disorders include, but are not limited to, ischemic reperfusion injury, inflammatory diseases, systemic lupus erythematosis, myocardial infarction, stroke, traumatic hemorrhage, spinal cord trauma, Crohn's disease, autoimmune diseases (e.g., rheumatoid arthritis, diabetes), cataract formation, age-related macular degeneration, Alzheimer's disease, uveitis, emphysema, gastric ulcers, oxygen toxicity, neoplasia, undesired cell apoptosis and radiation sickness.
- oxidative stress refers to the level of damage produced by oxygen free radicals in a subject.
- the level of damage depends on how fast reactive oxygen species are created and then inactivated by antioxidants as well as the location and speed of repair.
- the term "deviation" or “deviate” as related to oxidative state and oxidative stress are used interchangeably and refer to a change in the antioxidant activity of a sample.
- the change in oxidative state can be an increase, decrease, elevation or depression of antioxidant activity from a known normal value.
- essential saccharides is used to define the monosaccharides commonly found in the oligosaccharide chains of cellular glycoproteins and which may not be readily available through diet or biochemical manufacture in the human body (see, e.g., Harper's Biochemistry (Murray et al., 1996)(listing eight) and Principles of Biochemistry, Vol II (Zubay, et al, 1995)(listing eleven).
- vitamin- and mineral-containing dietary supplements varies from mammal to mammal
- nutritionally effective amounts of the vitamins and minerals will vary, respectively.
- the lack of an essential amino acids, vitamin-C, iron, iodine, vitamins, minerals, carbohydrates, lipids and the like are known to affect physiological and cellular functions.
- a nutritionally effective amount of the anti-oxidants and saccharides disclosed herein serve to preserve and/or elevate the levels of these critical nutrients in the diet of, e.g., a human that seeks to maintain or augment their diet for these nutritional supplements.
- one mammal may require a particular profile of vitamins and minerals present in defined amounts
- another mammal may require the same particular profile of vitamins and minerals present in different defined amounts.
- the term "pharmaceutically acceptable salt” is used to describe those salts that are, within the scope of sound medical judgment, suitable for use in, on or with the tissues of humans and lower animals without undue toxicity, irritation, allergic response and the like and are commensurate with a reasonable benefit/risk ratio.
- Pharmaceutically acceptable salts are well-known in the art (see e.g., S. M. Berge, et al, J. Pharmaceutical Sciences, 1977, relevant portions incorporated herein by reference). Suitable salts may be prepared during the final isolation and purification of the compounds of the invention or separately by reacting a free base function with a suitable organic acid.
- Representative acid addition salts include, but are not limited to acetate, adipate, alginate, citrate, aspartate, benzoate, benzene sulfonate, bisulfate, butyrate, camphorate, camphor sulfonate, digluconate, glycerophosphate, hemisulfate, heptanoate, hexanoate, fumarate, hydrochloride, hydrobromide, hydroiodide, 2-hydroxyethansulfonate (isothionate), lactate, maleate, methane sulfonate, nicotinate, 2-naphthalene sulfonate, oxalate, palmitoate, pectinate, persulfate, 3-phenylpropionate, picrate, pivalate, propionate, succinate, tartrate, thiocyanate, phosphate, glutamate, bicarbonate, p-toluene sulfonate and
- Examples of basic nitrogen-containing groups that are used as quaternizing agents include: lower alkyl halides (methyl, ethyl, propyl, and butyl chlorides, bromides and iodides); dialkyl sulfates (dimethyl, diethyl, dibutyl and diamyl sulfates); long chain halides (decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides); arylalkyl halides (benzyl and phenethyl bromides) and the like.
- lower alkyl halides methyl, ethyl, propyl, and butyl chlorides, bromides and iodides
- dialkyl sulfates dimethyl, diethyl, dibutyl and diamyl sulfates
- long chain halides decyl, lauryl, myristyl and stearyl chlorides, bro
- Basic addition salts can also be prepared in situ during the final isolation and purification of anti-oxidant compounds disclosed herein with a suitable base such as the hydroxide, carbonate or bicarbonate of a pharmaceutically acceptable metal cation or with ammonia or an organic primary, secondary or tertiary amine.
- Pharmaceutically acceptable salts include, but are not limited to, cations based on alkali metals or alkaline earth metals such as lithium, sodium, potassium, calcium, magnesium and aluminum salts and the like and nontoxic quaternary ammonia and amine cations including ammonium, tetramethylammonium, tefraethylammonium, methylammonium, dimethylammonium, frimethylammonium, triethylammonium, diethylarnmonium, and ethylammonium among others.
- Other representative organic amines useful for the formation of base addition salts include ethylenediamine, ethanolamine, diethanolamine, piperidine, piperazine and the like.
- potentiate refers to one or more agent that act directly or indirectly to increase or enhance the activity of the lipophobic and/or lipophilic antioxidants of the present invention.
- One such potentiator is Vitamin C, which may act to reactivate or recycle the anti-oxidants and may itself have significant antioxidant activity. The pro-oxidant properties of vitamin C have been observed in the presence of transition metals.
- Other potentiators of anti-oxidant activity include natural extracts, such as grape seed extract and green tea extract. In one study, green tea exhibited potent antimutagenic activity in vitro and inhibited the development of carcinogen-induced preneoplastic lesions in the animal model.
- the potentiator enhace or may even synergize with the purified and isolated anti-oxidants from natural sources, such as quercetin and mixed tocopherols.
- the terms "glyconutritional” or “glyconutrient” refer to complex carbohydrates or saccharides or simple sugars that are synthesized in nature and are necessary for the biochemical synthesis of various classes of communication and signal molecules that may be free in interstitial cellular fluids, active in cell to cell communication (i.e., cytokines, growth factors, etc.), or constitute the molecular configuration comprising foci of highly specific molecular activity of cell membranes (i.e., receptor sites, ion-transport channels, antigenic identification, and the like).
- phytonutritional or “phytonutrient” refer to naturally synthesized molecules found only in plants that are produced to protect the plant's cells. Phytonutrients primarily have antioxidant, free-radical scavenger and vital micronutrient activity. These molecules, supplied through dietary supplementation, are found in mature plant tissues, and are most concentrated in seed coats and fruiting tissues surrounding the seed, hi mammalian tissues, these molecules, when supplied in the diet, are active in optimizing the biochemistry, immunology and physiology in the cellular micro- environment.
- plant extract and “herbal extract” are used interchangeably to refer to phytochemicals that are produced in plant tissues and that can be extracted by water, polar, or petroleum solvents, and that have some degree of beneficial health or therapeutic activity. Most herbal agents can be toxic, especially when concentrated, but are generally safe when utilized in their more traditional manner in teas and poultices as a "folk medicinal for the treatment of disease and promotion of good health.”
- the term “herbal body-toning agent” refers to substances that have been observed by the inventors to reduce and reverse elastic tissue and collagen fiber damage caused by aging or sun-damage as evidenced by a restoration of skin turgor and elasticity which effectively reduces or eliminates wrinkles, sagging, hyperpigmentation and reversal of other undesirable elements of lost cosmetic appearance.
- the carbohydrates included in the dietary supplement of the invention are available from a wide variety of natural and synthetic sources such as shrubs, trees, plants, yeasts, fungi, molds, gums, resins
- some of the natural sources include: (a) shrub or tree exudates which contain acacia, karaya, tragacanth, or ghatti; (b) marine gums which include agar, algin, or carrageenan; (c) seed gums which include guar, locust bean, or psyllium; (d) plant extracts which contain pectins or acetylated polymannose; (e) starch and cellulose derivatives such as hetastarch, carboxymethylcellulose, ethylcellulose, hydroxypropyl methylcellulose, methylcellulose, oxidized cellulose; and microbial gums which contain dextrans, xanthan.
- composition of the invention is not intended to be limited by the source from which the respective carbohydrates are obtained.
- the saccharides of the invention can be found in nature as mono-, oligo- and/or polysaccharides.
- the compositions of the invention can contain the saccharides in their monomeric, oligomeric and/or polymeric forms.
- compositions of the invention are intended to include at least two or more essential saccharides, it should be noted that the saccharides can be in the form of mono-, oligo- and/or polysaccharides, e.g., a composition containing gum tragacanth and guar gum will be considered as containing galacturonic acid, sialic acid, mannose and galactose.
- a mixture of at least two forms of vitamin E is used to describe a mixture of at least two forms of tocopherol selected from alpha, beta, delta, epsilon, gamma, zeta, eta, xil, xi2, and sigma tocopherols, and alpha, beta, delta and gamma tocotrienols, and combinations or derivatives thereof.
- a mixture of at least two forms of vitamin E is a mixture of at least two forms of tocopherol selected from alpha, beta, delta, and gamma tocopherol. In another embodiment, "a mixture of at least two forms of vitamin E” is a mixture of alpha, beta, delta, and gamma tocopherol. "A mixture of at least two forms of vitamin E” may be obtained from VITAECAPS, SA, Spain, from Henkel Corporation; or from Cognis Corporation (Kankakee, IL), for example. COVITOL ® F-350M is commercially available from Cognis and contains natural source alpha-tocopherol with mixed tocopherols which are obtained from edible vegetable oils.
- the particular mixture of tocopherols included in the antioxidant composition of the present invention is determined by running an ORAC(o) antioxidant determination.
- Salts or derivatives of tocopherols include pharmaceutically acceptable salts such as acetate, sulfate, succinate, nicotinate, allophanate, phosphate, quinone, or halogenated derivatives; esters; stereoisomers; and the like.
- the invention encompasses the use of vitamin E derivatives in which substitutions, additions, and other alterations have been made in the 6-chromanol ring and/or side chain, with the proviso that the derivatives maintain antioxidant activity of a vitamin E.
- tocopherols and their derivatives can vary by the number and position of alkyl groups, double bonds and other substituents and variations on the ring and side chain.
- An "alkyl” is a cyclic, branched or straight chain chemical group containing only carbon and hydrogen, such as methyl, butyl, and octyl.
- Alkyl groups can be either unsubstituted or substituted with one or more substituents, e.g., halogen, alkoxy, acyloxy, amino, hydroxyl, mercapto, carboxy, or benzyl.
- Alkyl groups can be saturated or unsaturated at one or several positions.
- alkyl groups will comprise 1 to 8 carbons, 1 to 6, or 1 to 4 carbon atoms.
- Additional tocopherols can be constructed by conjugation to the ring structure or side chain of various other moieties, such as those containing oxygen, nitrogen, sulfur and/or phosphorus.
- Tocopherol derivatives can also be made by modifying the length of the side chain from that found in prototypical tocopherols such as alpha-, beta-, delta- and gamma-tocopherol. Tocopherols can also vary in stereochemistry and saturation of bonds in the ring structure and side chain.
- Additional tocopherol derivatives, including prodrugs can be made by conjugation of sugars or other moieties to the side chain or ring structure.
- Mixed tocopherols include without limitation mixtures of stereoisomers of a single tocopherol (e.g., +and - stereoisomers of alpha-tocopherol; (+/-) indicates a racemic mixture) or mixtures of structurally distinct tocopherols (e.g., alpha- plus gamma-tocopherol).
- the present invention includes the above cited eleven essential saccharides, it should be noted that other saccharides, nutritional compounds or biologically active or inert compounds may be included in the dietary supplement of the invention.
- Such other nutritional compounds include any one or more of phytonutrients, dioscorea complex, plant extracts, herbal extracts, plant parts, herbal components, vitamins or minerals.
- These nutritional compounds can be added to the dietary supplement of the invention, or they can be provided separately to a mammal being administered the dietary supplement.
- a person receiving the glyconutrient-containing dosage form of the invention can also receive a phytonutrient in either the same or a separate dosage form.
- Inert compounds can include flavors, fillers, lubricants, buffers, gels, binders, excipients, carriers and/or other such compounds that facilitate the formulation or adininistration of the inventive dietary supplement. All of the glyconutrient containing dietary supplement compositions of the invention, even those containing additional compounds, agents or other substances, can be obtained directly from Mannatech, Inc. (Coppell, Tex.).
- the present invention includes an apparatus and method for directly and concurrently measuring the oxygen radical absorption capacity (ORAC) of a composition that includes both hydrophobic and/or hydrophilic antioxidants.
- ORAC oxygen radical absorption capacity
- the term "ORAC(o)" is used since the assay measures the ability of antioxidants to quench radicals by directly tracking the disappearance of oxygen in an oxygen radical absorption capacity assay the directly measures oxygen content in a sample (ORAC(o)).
- Current industry standard assays such as ORAC(fl) and ORAC( ⁇ -PE), measure antioxidant capacity by indirectly measuring degradation of fluorescent emissions of a fluorescent compound (fluorescein or ⁇ -phycoerythrin) upon exposure to oxygen radicals.
- FIG. 1 is a depiction of an ORAC(o) direct anti-oxidant apparatus 10.
- the apparatus 10 has, as depicted, three basic components: a detector system 12, a fluidics system 14 and a data processor system 16, which may be interconnected to provide data capture, fluidic and sample control and data processing.
- the detector system 12 has an oxygen sensor 18, which is in fluid communications with the fluidic system 14 via one or more conduits 20. Fluid flowing through the one or more conduits 20 is controlled using one or more valves 22, which may be manually controlled and/or under the control of the data processor system 16.
- a sample 24 enters the fluidic system and is directed into the detector 18, and after data capture is delivered to waste storage 26.
- the fluidics system 14 may also include one or more solutions 28 that directed into transit through the fluidic system 14 by pumps, by vacuum or by pressure, e.g., pressurized inert gas.
- the solutions 28 in the fluidics system 14 will generally be premixed or equilibrated, as for use with the present invention may generally include: water, a solvent, a detergent or water: detergent mix, an oxygen radical generator, an oxidation target, etc., and may be mixed at mixing chamber 30 prior to delivery to the oxygen detection chamber 34.
- the choice of fluidics system will depend on the extent of automatization desired or chosen, as will be known to those of skill in the art.
- the sample 24 may be pre-mixed with the same solution that is used to calibrate the oxygen sensor 18 or may even be pre-mixed at the mixing chamber 30.
- oxygen detectors 18 for use with the present invention will include any dissolved oxygen sensor that is able to detect dissolved oxygen in the presence of a solvent, water and a detergent.
- dissolved oxygen sensors include, e.g., electrochemical, chemiluminescent, surface plasmon resonance, infrared, capacitance coupled, dye-coupled fiber optic or even hyperspectral oxygen sensors.
- the dissolved oxygen sensor is an YSI 5300A biological oxygen sensor (YSI, USA), a SPREETA sensor (Texas Instruments), a PASCO PS2108 (Pasco, USA), and the like.
- the dissolved oxygen sensor has the following specifications: Range of: 0-20 mg/L; Accuracy: ⁇ 10%) of full scale; Resolution: 0.01 mg/L; Maximum Sample Rate: 20 sps; Default Sample Rate: 2 sps; Response: 98% in 60 seconds; Temperature Range: 0-50°C; Temperature Compensation: 10-40°C; Cathode: Platinum; Anode: Ag/AgCl; Membrane: 1 ml silicon, and may be used in conjunction with the software provided by the manufacturer, e.g., Dissolved Oxygen EZ (Pasco, USA).
- the system may also include pH, ORP, conductivity or turbidity sensors in fluid communication with the fluidics system
- ORAC(o) system disclosed herein may be used as follows: a user collects a sample and dissolves it in or with a ORAC(o) solvent kit (dry or liquid).
- An ORAC(o) sensor e.g., a hand-held surface plasmon resonance oxygen sensor (see, e.g., Texas Instruments SPREETA sensor) is exposed to one or more calibration standards and then exposed to the user sample.
- the oxygen sensor is connected to a processor that evaluates the output from the detector surface on the sensor and provides the user with a read-out.
- the read-out may be displayed on a screen, printed and/or transmitted to a processor, memory and the like.
- the user sample may be a urine, saliva, tears, mucus secretions, sweat, blood (or blood products), tissue, feces or other biological samples suspected of having oxygen radicals.
- the sample is one or more breaths (one or more inhalations and/or exhalations) that are collected by a respirator, e.g., a closed respirator.
- the values detected by the sensor may even be saved in memory (volatile, semi-permanent or permanent) for future reference or for comparison to past or future values to evaluate the oxidative state of the user.
- the ORAC(o) assay for antioxidant activity of the present invention take advantage of existing ORAC-like methods and are therefore easily adaptable for use in laboratories without the need for extensive training, if any.
- the ORAC(o) uses an oxygen sensor, for example a blood plasma oxygen sensor or a dissolvable oxygen sensor to measure pro-oxidant activity, e.g., by measuring directly the relative activities of one or more oxygen radical generating molecules in the sample solution and a oxidative quencher (anti-oxidant) as standards.
- an oxygen sensor for example a blood plasma oxygen sensor or a dissolvable oxygen sensor to measure pro-oxidant activity, e.g., by measuring directly the relative activities of one or more oxygen radical generating molecules in the sample solution and a oxidative quencher (anti-oxidant) as standards.
- a radical quencher e.g., oxidative quencher
- both the radical quenching and non-radical quenching activities of the samples tested relate to oxidative state.
- the relative activities of the oxygen radical generator and the oxygen radical quencher may be titrated and/or measured over time as with the indirect methods ORAC(fl), ORAC(fl-lipo), ORAC( ⁇ -PE) and the like.
- Figure 2 is a flowchart 50 that summarizes the basic steps of the method of the present invention.
- the dissolvable oxygen probe is equilibrated and/or calibrated in the presence of the solvent: water: detergent mixture and a baseline measured.
- the solvent:water:detergent is an acetone:water:Tween-20 mixture at a 1:1:1 ratio.
- a baseline determination of anti-oxidant activity serves as the positive control and baseline for comparison of anti-oxidant activity using, e.g., Trolox® as the anti-oxidant.
- Trolox® One advantage of Trolox® and related molecules is that these Vitamin E derivatives are more stable from lot to lot, have less lot variation and are synthetic, thereby providing a reliable concentration of anti-oxidant activity.
- the mixture in step 54 is mixed, in step 56, with an oxygen radical target, e.g., linoleic acid prior to the addition of the oxygen radical generator in step 58.
- the assay is allowed to run and, in step 60, the area under the curve (AUC) is calculated by measuring the disappearance of dissolved oxygen over time, and the value for the sample stored.
- AUC area under the curve
- a sample is dissolved in the solvent:water:detergent mixture (step 66) followed by the addition of the oxygen radical target in step 68.
- the AUC for the sample is detected, and the value for the sample stored.
- the detergent Tween 20 may aid in the dispersion of linoleic acid. Linoleic acid provides double bonds across which oxygen can be absorbed.
- Trolox® is a synthetic antioxidant used as an internal standard. The values obtained from all samples are related back to those of Trolox®.
- the oxygen radical generating molecule 2,2' azobis (2-amidinopropane)dihydrochloride (AAPH reacts) with oxygen to create carbon-centered radicals.
- the radicals generated by AAPH cause the oxidation of linoleic acid.
- linoleic acid's double bonds become ketones, bonding with oxygen molecules in the carbon-centered radical.
- the oxygen probe takes measurements of the rate at which the oxygen is being removed from the reaction chamber due to the oxidation of linoleic acid.
- the azo radical may react directly with linoleic acid, causing the formation of a linoleic acid radical.
- the linoleic acid radical then reacts with the oxygen present in the reaction chamber to form a ketone. Through either proposed mechanism, oxygen is consumed due to the oxidation of linoleic acid.
- the antioxidant slows the consumption of oxygen in the reaction chamber by deterring the oxidation of linoleic acid.
- the calculation of the area under the curve for dissolved oxygen versus time plot yields a measure of the sample's antioxidant capacity as demonstrated by its ability to slow the oxidation of linoleic acid.
- the oxygen radical generators. Azo-radical generators are present in the ORAC(o) assay of the present invention at a known concentration to generate radicals for measurements of antioxidant activity.
- Azo initiators include, for example, 2,2'-azobis[2- (5-methyl-2-imidazolin-2-yl)propane]dihydrochloride, 2,2' azobis (2- amidinopropane)dihydrochloride (AAPH), 2,2'-azobis(2-amidinopropane)[2-(N- stearyl)amidinopropane] dihydrochloride (SA-1), 2,2'-azo(2-(2-imidiazolin-2-yl)-propane)- [2-[2-(4-n-octyl)imidazolin-2-yl]- ⁇ ropane] dihydrochloride (C-8), 2,2'-azobis(4-methoxy- 2,4-dimethylvaleronitrile) (MeO-AMVN), 2,2'-azobis(2,4-dimethylvaleronitrile) (AMVN), azo-bis-isobutylnitrile, 2,2'-azobis (2-
- the radical generator 2,2' azobis (2-amidinopropane) dihydrochloride decomposes into molecular nitrogen and two carbon radicals.
- the carbon radicals combine to produce stable products or react with molecular oxygen to give peroxyl radicals.
- the half life of AAPH is about 175 hours (37 °C at neutral pH). Therefore, the rate of free radical generation is essentially constant during the first several hours in solution.
- AAPH is used is often used for lipid peroxidation in aqueous dispersions of fatty acids, as such; it can be used alone or in combination with a lipohilic and/or a lipophobic radical generator.
- the solvent system disclosed herein allows for use of either or both lipohilic and/or a lipophobic radical generators as the apparatus measures total oxygen in the sample.
- Solvent System The solvent system for the ORAC(o) is a three-part system that includes a solvent, an aqueous phase and a detergent.
- the solvent may be an organic solvent selected from alcohols, amines, esters, glycol ethers, glycols, terpenes and/or mixtures thereof.
- the organic solvent system is formulated to be less than about 50%, around 30 or 33 percent, less than 20% and in some cases less than 10%o of solvent components.
- the solvent is acetone, which may be from between about 10 and 90 percent vol/vol of the ORAC(o) solvent system, the aqueous portion from between about 10 and 90 percent vol/vol of the ORAC(o) solvent system and the detergent from 0.001 to 90%) of the solvent system.
- the ORAC(o) solvent system may be one-third water, one-third detergent ("one-third" solvent), and the sample at a concentration of, e.g., 1 mg/mL. Dilutions are then made using the same solvent.
- the detergent may be a nonionic detergent such as TWEEN®, (i.e., TWEEN®20), BRIJ®, or TRITON®; a zwitterionic detergent such as CHAPS®; a cationic detergent; or an anionic detergent such as cholate, deoxycholate, sodium dodecylsulfate, or TWEEN®-80; or a surfactant.
- the ratio of water to acetone to detergent may be from between about 5% to 90%) to 90% to 5%, respectively.
- the detergents of the ORAC(o) solvent system permit a direct measurement of oxygen from the total sample.
- ORAC(fl-lipo) that uses a randomly methylated ⁇ -cyclodextrin.
- the ORAC(o) assay may be used to measure the total antioxidant activity of biological samples, for the evaluation of components for the nutritional supplements of the present invention and even for testing and evaluating competitor and/or the final dietary supplement of the present invention.
- these may be, e.g., serum, lipid-soluble serum fraction, water-soluble serum fraction, urine, lipid-soluble urine fraction, water-soluble urine fraction, LDL fraction, tissue homogenates, quality control of antioxidant supplements, food products, or preservatives, development of new antioxidant supplements, development of new food products, new preservatives, or new antioxidant therapies, quality control of food manufacturing and processing, assessing antioxidant activity of plants, or monitoring the antioxidant activity of cosmetic products, for example.
- EXAMPLE 1 Comparison of Antioxidant Activity Using ORAC(fl) and
- ORAC(fl) ORAC(fl)
- ORAC(o) dissolved oxygen
- the antioxidant activity of a product is its ability to protect the system from damage caused by peroxyl radicals.
- ORAC(fl) assay the method of Ou et al. (Ou , B., Hampsch-Woodill, M. and Prior, R.L., J Agric. Food Client. 2001, 49, 4619-4626) was followed.
- Trolox® 6-Hydroxy-2,5,7,8-tetramethylchroman-2- carboxylic Acid
- Trolox® is a cell-permeable, water-soluble derivative of vitamin E with potent antioxidant properties.
- Trolox® prevents peroxynitrite-mediated oxidative stress and apoptosis in rat thymocytes and is a synthetic antioxidant that is consistent from lot-to-lot and is used as the standard and run for comparison with each sample.
- a blank (control) used in calculations of the ORAC(o) value for each samples may be included in each run. Fluorescence vs. time is plotted. The blank (control) is subtracted from every curve. The net area under the curve of the antioxidant is compared to the net area under the curve of Trolox®.
- Trolox® is used as the standard, and a blank is run as a control. Amount of dissolved oxygen vs. time is plotted allowing direct comparison of net areas under the curve.
- Buffers K2HPO4 (F.W. 174.2), NaH2PO4 (FW 120.0)
- Linoleic acid 99%, Trolox® (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid) 97%, TWEEN® 20, and 2,2'-azobis (2-methylpropionamidine) dihydrochloride 97% (AAPH), were obtained from Aldrich (Milwaukee, WI).
- HPLC grade acetone was obtained from Fisher (Hampton, NH).
- a YSI 5300A biological oxygen meter was obtained from YSI (Yellow Springs, Ohio) and used according to the manufacturer's specifications. ORAC(o) Method. The following stock solutions were used. Preparation of phosphate buffer (75 niM, pH 7.4); 750 mM K 2 HPO 4 (F.W. 174.2); Weigh 65.33g into 500mL of volumetric flask, and add dH20 to the mark. Concentration is 750 mM. Store 750 mM K HPO 4 stock solution in a refrigerator (2 to 8°C) equipped with a calibrated thermometer. Target temperature is 4°C.
- 750mM NaH 2 PO (FW 120.0); Weigh 45.00 g into 500 mL of volumetric flask, and add dH20 to the mark. Concentration is 750 mM.
- Target temperature is 4°C.
- Target temperature is 4°C.
- Tween Preparation Weigh out lOg of Tween 20, and add 90 g of deionized water. Cover and stir the mixture overnight. Tween stock solution keeps for one week. Keep on countertop. Solvent Preparation. Mix 25 mL of acetone, 25 mL of deionized water, and 25 mL of Tween 20. Use this solvent to prepare samples. Before a run is performed: the probe should be inspected for damage paying particular attention to the membrane, replace if needed. Probes should be stored with the tips in deionized water.
- samples were prepared at a concentration of lmg/mL in "one-third solvent” (also referred to as the ORAC(o) solvent system).
- a "one-third” solvent is equal parts of water, acetone, and a solution of TWEEN ® 20 diluted 1:9 with water. Samples were shaken for 1 hour at room temperature on an orbital shaker at 280 rpm. The sample solution was ready for analysis after further dilution (generally to 10 ⁇ g/mL) with "one-third” solvent. "One- third" solvent was also used as the blank.
- Linoleic acid was prepared by adding 0.18 mL of 75 mM phosphate buffer (pH 7.4), 0.18mL of 10 weight percent TWEEN ® 20 stock solution, and 0.44 mL of deionized water to 70.8 mg linoleic acid.
- AAPH was prepared by adding 0.9 mL of buffer to 67.8 mg of AAPH.
- linoleic acid 21.59 mM
- AAPH (19.00 mM) was used as a peroxyl radical generator.
- Trolox® (at 10 ⁇ g/mL) was used as a standard. Readings were taken every second until a zero reading was observed.
- the formula for calculating the ORAC(o) value is: AUCSMP-AUCBLNK X 1000 (mg/gr) X [TRLX ( ⁇ mol/ml)] AUCTRL -AUCBLNK
- the ORAC(o) may be calculated in milliliters when evaluating a liquid formula. This calculation yields a quantity known as micromoles of Trolox® equivalents per gram of sample.
- a negative value ORAC(o) reflects less radical quenching activity than obtained with a blank which indicates that a composition is a pro-oxidant, i.e., an agent that promotes oxidation, rather than acting as an antioxidant.
- An assumption of the ORAC(o) assay is that oxygen is not being absorbed or released by the sample, however, any effect in the oxygen level of the sample can be evaluated and used to compensate into the calculated anti-oxidant value. Comparison of ORAC(o) and ORAC(fl) Assay Parameters.
- the advantages of the ORAC(o) as compared to the ORAC(fl) were measured in a direct vs. indirect measurement of antioxidant potential.
- the ORAC(fl) is an indirect oxygen radical detection method because it relies on the assumption that the fluorescein (target molecule) is the only fluorescent component being measured.
- many antioxidant compounds fluoresce naturally (e.g., blueberries); and combinations of these compounds from radical-radical reactions fluoresce also. Fluorescence from the sample, therefore, can skew the results of an assay based on fluorescence.
- the ORAC(o) method is a direct measurement of oxygen uptake, that is, a direct measurement of the disappearance of oxygen into free radicals.
- One distinct advantage of the present invention is that the user does not need to learn new techniques or purchase equipment to incorporate the present apparatus and method into their laboratory environment. For example, when measuring sample saturation, the present invention uses many of the same buffers, conditions, extraction and/or separation steps as in the well-established indirect measurement system developed by, e.g., Ou, et al.
- FIG. 7 shows the quercetin at 5 ⁇ g/mL and mixed tocopherols at 5 ⁇ g/mL as compared to each ingredient separately at 10 ⁇ g/mL but also includes the Trolox® control and demonstrates the ability of ORAC(o) to detect the level of oxygen radicals remaining in the sample over time.
- the ORAC(o) provides a significant savings as compared to the more expensive ORAC(fl) (automated circa $250,000; non-automated circa $50,000).
- the ORAC(o) apparatus disclosed herein takes advantage of off-the-shelf oxygen sensor systems that may be easily miniaturized and/or automated that may be developed for sale to doctors offices and even home use at a fraction of the costs of large fluorimeter detection systems.
- Validation as conducted by the Association of Official Analytical Chemists (AOAC) guidelines for single laboratory validation, provided results in Tables 2, 3, and 4. Table 2. 5 Day Trial for Precision (Repeatability)
- the values for each day are an average of 3 runs of the quercetin sample at a concentration of lO ⁇ g/mL.
- the HORRAT value is the ratio between observed RSD R values and the RSD R values predicted by the Horwitz equation known to those of skill in the art, and is regarded as an indication of the acceptability of a method with respect to its precision. In a single laboratory performance study, a series of HORRAT ratios between 0.5 and 2.0 indicate acceptable precision of a method. The HORRAT value for the 5-day trial is 1.98.
- a determination of the analytical range as a linear range is provided in Table 3. Table 3. Determination of Analytical Range
- the single day precision trial involved 5 separate runs of the quercetin sample at a concentration of 10 ⁇ g/mL.
- the HORRAT value of Table 4 for the ORAC (o) method is 0.65448.
- the ORAC(o) assay was used to optimize ratios of the ingredients in an antioxidant composition as set forth in Example 2.
- One embodiment of the composition has weight ratios of quercetin, 49.18%; mixed tocopherols, 32.79%; grape skin extract, 9.84%>; green tea extract, 6.56%>; and bush plum, 1.64% gave an antioxidant value using the ORAC(o) of 17,254 micromoles Trolox® equivalents per gram.
- EXAMPLE 2 A Synergistic Antioxidant Composition. According to the dietary supplement of the present invention, five ingredients were combined into an antioxidant composition, each of which is prominent in the diet of long- lived peoples from regions around the world. The present inventors selected ingredients based on a comprehensive search of the diets in areas known for longevity. The present inventors recognized that the diets in these regions were rich in flavonols and tocopherols.
- the following basic ingredients were selected: flavonols, mixed tocopherols, grape skin extract, green tea extract, or bush plum are prominent in the diet of peoples of the Andean village of Vilcabamba in Ecuador, the land of Huza in the Karakoram Range in Jerusalem, or in Abkhazia in the Georgian State of the former USSR, for example, as cited in Leaf A., Launois J. "A Computer Visits Some of the World's Oldest People," National Geographic. 1973 January; of the Italian island of Sardinia (Koenig R. "Sardinia's Mysterious Male Methuselahs," Science. 2001, March 16), and of Australia.
- the compositions of the present invention demonstrated a synergistic antioxidant activity.
- the various ingredients of the antioxidant composition have activity for protecting intracellular cytosol, cellular membranes, and extracellular fluid such that the body is protected throughout.
- the bush plum component is high, for example, in natural vitamin C content, which can get into the cell, is hydrophilic, and is available for protecting the cytosol; the grape skin extract and green tea extract are hydrophilic, cannot enter the cell and are available for protecting extracellular fluid; and mixed tocopherols are lipophilic, and together with flavonols (e.g., quercetin), which are both hydrophilic and lipophilic, protect membranes.
- any fiber that is included in the diet, or even in the dietary supplement itself may provide adequate vehicle for elimination.
- an antioxidant composition having synergistic activity was developed that includes flavonoids, e.g., quercetin, a mixture of at least two forms of vitamin E, and optionally, grape skin extract, green tea extract and Australian bush plum.
- the synergism is particularly observed in a weight ratio of quercetin to the mixture of vitamin E forms of 40/60 to 90/10%.
- One embodiment of the composition includes the following weight ratios: quercetin, 49.18%; mixed tocopherols, 32.79%; grape skin extract, 9.84%>; green tea extract, 6.56%; and bush plum, 1.64%.
- FIG. 6 is a graph that shows the results of an ORAC(o) assay comparing quercetin, mixed tocopherols, and mixture of tocopherols and quercetin and the synthetic anti-oxidant standard: Trolox® (Hoffman-La Roche). Flavonoids such as Quercetin.
- the flavonoid of the composition can be a flavone, a flavonol, an isoflavone, an isoflavonol, an analogue thereof, a pharmaceutically acceptable salt thereof, or a mixture thereof.
- a flavonol include quercetin, kaempferol, and myricetin.
- the particular flavonoid or flavonoid analogue or salt included in the composition is determined by running an ORAC(o) antioxidant determination. An activity within 80%> percent of that of quercetin is contemplated to provide an analogue.
- references to a flavonoid in particular, quercetin, also is intended to refer to the aglycone or a glycoside thereof where the sugar is arabinose, rhamnose, galactose or glucose, for example.
- the rhamnose glycoside of quercetin is known as rutin or quercetrin
- the rhamnose glycoside of myricetin is known as myricitrin.
- Analogues of quercetin include those compounds which comprise a substituting group other than an -OH group at one or more of the positions 3, 5, 7, 3', and 4'. Other substituting groups include: alkyl less than 5 carbon atoms, acetyl, sulphyl, or malonyl.
- Flavonoids such as quercetin are readily synthesized in vitro. However, flavonoids (including quercetin) are present and may be isolated and purified from, e.g., naturally occurring foodstuffs, in particular, fruits and vegetables, such as apples, pears, grapes, onions, red wine, bell peppers, red currants, black currants, lemons, cherries, cranberries, gooseberries, tomatoes, olives, radishes, kohlrabi, horseradish, potatoes, and asparagus. Quercetin may be obtained from Pharmline (Florida, NY). Bush Plum: The Australian bush plum (Terminalia ferdinandiana) contains about
- HPLC chromatogram is from a reverse phase C 18 column using a stepped gradient of 0.1% trifluoroacetic acid and 100%> methanol, at a flow rate of lmL/min using a sample of methanol and water-extracted bush plum powder. The conditions were developed to separate flavonoids and to separate vitamin C. The absorbance was measured at 245 nm. Pulp and skin of a bush plum are removed from the seed of the fruit and made into a slurry in water. The slurry is freeze-dried and ground. For antioxidant compositions herein, the freeze-dried material is weighed in the desired amount.
- Bush plum is present in the composition of the present invention in an amount of from 0%> to 87.9%>, or in another embodiment, about 2% by weight.
- Grape skin extract is made from grape skins, and contains 30- 82%o polyphenols and may be obtained from Polyphenolics, Madera, CA; Hunan Kinglong, Bio-Resource Co. Ltd, Changsha Economic Development Zone, China; or from Pharmline, Florida, NY.
- Green tea extract Green tea extract. Green tea extract is an extract from the leaves of Camellia sinensis, contains 35-95%> polyphenols, and may be obtained from Amax NutraSource Inc., Eugene, OR; Blue California, Collinso Santa Margarita, CA; or from PL Thomas & Co., Morristown, N.J. Other Ingredients.
- the antioxidant compositions of the present invention may include one or more, non-toxic, pharmaceutically acceptable carrier such as lactose, starch, sucrose, glucose, methyl cellulose, magnesium stearate, dicalcium phosphate, calcium sulfate, mannitol, sorbitol, cyclodextrin, cyclodextrin derivatives, or the like.
- a tablet may be made by compression or molding, optionally with one or more additional ingredients.
- Compressed tablets may be prepared by compressing the active ingredient in a free flowing fonn (e.g., powder, granules) optionally mixed with a binder (e.g., gelatin, hydroxypropylmethylcellulose), lubricant, inert diluent, preservative, disintegrant (e.g., sodium starch glycolate, cross-linked carboxymethyl cellulose) surface- active or dispersing agent.
- Suitable binders include starch, gelatin, natural sugars such as glucose or beta-lactose, corn sweeteners, natural and synthetic gums such as acacia, tragacanth, or sodium alginate, carboxymethylcellulose, polyethylene glycol, waxes, or the like.
- Lubricants used in these dosage forms include sodium oleate, sodium stearate, magnesium stearate, sodium benzoate, sodium acetate, sodium chloride, or the like.
- Disintegrators include, for example, starch, methyl cellulose, agar, bentonite, xanthan gum, or the like.
- Molded tablets may be made by molding in a suitable machine a mixture of the powdered active ingredient moistened with an inert liquid diluent. Capsules or tablets may optionally be coated or scored and may be formulated so as to provide slow- or controlled-release of the antioxidant composition.
- Timed-release compositions for controlled release of agents generally contain agent particles mixed with or coated with a material that is resistant to enteric degradation or disintegration for a selected period of time. Release of the agent may occur by leeching, erosion, rupture, diffusion or similar actions. Carriers may promote antioxidant stability as well as providing time release. A mixture of plant carbohydrates termed AMBROTOSE ® Phyto Formula may be combined with the antioxidant composition. Such a combination extends the shelf life of the antioxidant composition and provides for a time release form.
- AMBROTOSE ® Phyto Formula contains, in a weight/weight ratio of about 30/30/20/19/1, gum Arabic(acacia), xanthan gum, gum tragacanth, gum ghatti, (which may be obtained from TicGum) and an aloe vera gel extract (e.g., inner leaf gel, Carrington Labs, Irving, TX, MANAPOL powder or similar product).
- the AMBROTOSE ® Phyto Formula is blended with the antioxidant composition of the present invention in a weight ratio of 2:1 to 1:2.
- AMBROTOSE ® Phyto Formula is blended with the antioxidant composition in a weight ratio of 2 : 1.
- Capsules or tablets may contain further plant components in weight percentages less than about 0.1 % to 90%o depending on the specific formulation.
- the carriers themselves will generally have no effect on the nutritional significance to the composition, however, these carriers may have a significant in the timing, location and release profile of the release of the nutritionally effective amounts of the present invention.
- one or more of the anti-oxidants of the present invention may be released in one or more boluses so as to spike the anti-oxidant levels as detected in, e.g., blood or urine, in a series of release events, h another embodiment, the anti-oxidants may be released somewhat evenly, or may even be provided as a gradient with spikes in blood or urine levels.
- a process of formulating a roller compacted antioxidant composition comprises blending AMBROTOSE ® Phyto Formula with the antioxidant composition set forth herein.
- the resultant blend is transferred to a roller compactor and compacted between rollers to form a compact.
- the pressure imparted on the blend enhances the physical adhesion between the ingredients.
- the compact is subsequently milled to form a granulation.
- a granulation is then formed into the desired dosage form, such as capsules or tablets.
- a Fitzpatrick Chilsonator Model 4LX10D roller compactor may be used with rolls that are notched across the face and perpendicular to the rotation, having a fixed force of 10 ton, and a Fitzmill screen of about 0.093.
- the roller compaction device may have variable rotation speed, force application, and gap width capabilities, for example, a Gerteis Polygran dry roller compactor system (Gerteis, Germany).
- the roller compactor functions by uniformly applying pressure on a blend by passing the blend between two counter-rotating rollers.
- the pressure imparted on the blend by the rollers compresses the blend into a compact, such as a sheet or ribbon, which is typically milled to produce granules. Alternatively, granulation may be achieved by slugging, milling or sieving as may be required. Granules having a #20-80 mesh are selected.
- a longer shelf life of the roller compacted combination of the antioxidant composition with AMBROTOSE ® Phyto Formula is believed due to the reduction in the amount of surface area of the antioxidant composition exposed to oxygen.
- the roller compacted combination also eliminates the need for excipient fillers in the capsule or tablet-making process.
- Additional benefits of a combination of AMBROTOSE ® Phyto Formula with the antioxidant composition set forth herein include: provision of non- soluble fiber which may serve as a sink for unpaired electrons in the gut, and provision of monosaccharides for correct structure of cellular glycoforms responsible for cell-mediated communication in repair of cells damaged by free radicals. Dosage.
- Useful dosage formulations for administration of the compositions of the present invention include capsules or tablets of 100, 200, 300, 400, 500, 600, 700, 800, 900 or 1000 mg of antioxidant composition. In one embodiment, no fillers, carriers, or stabilizers are added to the composition, hi another embodiment, AMBROTOSE ® Phyto Formula is blended with the antioxidant composition of the present invention in a weight ratio of 2:1, 1:1, or 1:2.
- AMBROTOSE ® Phyto Formula is blended with the antioxidant composition in a weight ratio of 2:1.
- a capsule or tablet provides 500 mg of antioxidant composition blended with AMBROTOSE ® Phyto Formula.
- two tablets or capsules may be taken per day.
- Appropriate coatings may be applied to increase palatability or delay absorption.
- FIG. 8 and FIG. 9, show the net area under the curve (AUC) results for varying ratios of quercetin and mixed tocopherols using the ORAC(o) method to measure antioxidant capacity.
- the total concentration of sample (Q + MT) is 10 ⁇ g/mL for each percentage assayed.
- the concentration of mixed tocopherols is 10 ⁇ g/mL, and there is no quercetin in the sample.
- the sample has 1 ⁇ g/mL of quercetin and 9 ⁇ g/mL of mixed tocopherols.
- the sample has 2 ⁇ g/mL of quercetin and 8 ⁇ g/mL of mixed tocopherols.
- the synergy is readily observed between 40 and 100%> quercetin, and most readily observed from 40 to 90% quercetin.
- the straight line represents the additive effect, i.e., at 10%o quercetin, the line represents the sum of 90% of the activity of mixed tocopherols alone and 10% of the activity of quercetin alone. A synergistic effect is found above this line.
- the primary anti-oxidant ingredients of the composition of the present invention flavonoids, as represented by quercetin, and a mixture of at least two forms of vitamin E
- the amount of quercetin is 49.18%>
- the amount of vitamin E forms is 32.79% of the total weight of the five ingredients.
- the secondary ingredients (or potentiators) of the composition of the present invention comprise from 0% to 87.9%, 15% to 70%, or about 18% by weight of the five ingredients.
- the optimal ratio of grape skin extract and green tea extract was determined in the presence of 49.18%) quercetin, 32.79% mixed tocopherols, and 1.64% bush plum.
- the optimal ratio of grape skin extract to green tea extract is 60/40 to 80/20. hi one embodiment, the grape skin extract is 9.84% and the green tea extract is 6.56 %> of the total weight of the antioxidant composition.
- Bush plum (Terminalia ferdinandiana) is provided as an ingredient of the composition in an amount from between about 0% to 87.9%>, or in another embodiment of about 2%.
- the bush plum is 1.64 % of the composition.
- the ORAC(o) assay shows that an antioxidant blend having the following weight ratios: quercetin, 49.18%o; mixed tocopherols, 32.79%>; grape skin extract, 9.84%>; green tea extract, 6.56%; and bush plum, 1.64% has an antioxidant activity of 17,254 micromoles Trolox® equivalents per gram. Stability of AMBROTOSE AOTM.
- AMBROTOSE AOTM a blend of
- FIG. 11 is a graph of ORAC(fl) results that shown no contribution to AO activity by ⁇ -tocopherol when mixed at different ratios with quercetin. The graph shows a linear increase in AUC that is directly proportional to increase in quercetin concentration in the ORAC(fl) assay in the standard acetone:water solution.
- FIGS. 12A and 12B are graphs of ORAC(fl-lipo) results using mixed-tocopherol and the relative AUC results using the solvent/water/detergent solution to dissolve the sample and detect both lipohilic and lipophobic anti-oxidant capacity.
- FIG. 11 above it was shown that no statistically significant activity could be detected for ⁇ -tocopherol using the standard ORAC(fl) method for detecting AO contribution of lipophilic AOs. As shown in FIG.
- FIG. 12A the ORAC(fl-lipo) AUC for ⁇ -tocopherol was compared between the published ORAC(fl-lipo) method (acetone:water) and an acetone:water:Tween-20 and a large increase in the AUC of the ORAC(fl-lipo) assay was detected.
- FIG. 12B demonstrates that there is no synergy detected using the known ORAC(fl-lipo) method when combining quercetin and mixed-tocopherols as the results follow a straight line through the abscissa, which indicates lack of synergy using this assay. Obtaining these results with known assays are not surprising based on a search of the literature and the methods recommended therein.
- FIG. 13 is a graph of ORAC(fl) AUC results using ⁇ -tocopherol with a variation in the amount of detergent used to show its effect on AUC measurements.
- the one third solvent was used in its full one third and in a mixture with a smaller amount of Tween-20.
- FIG. 14 is a graph of an ORAC(fl) assay measuring the anti-oxidant activity measured for a fixed ratio of querceti ⁇ -tocopherol ratio dissolved in two different rations of solvent: water to detergent mixtures.
- the results in FIG. 13 and FIG. 14, show that the detergent (Tween-20) did account for increase in AUC and therefore shows that detection of ORAC(fl) activity is increased as compared to the standard acetone: water mixture.
- EXAMPLE 3. ORAC(o) Detection of Anti-oxidant Synergy and Potentiation.
- FIG. 15 is a graph showing the ORAC(o) values obtained with different ratios of quercetin and mixed tocopherols.
- FIG. 16 is a graph showing the ORAC(o) values for different ration of grape seed extract (GES) and green tea extract (GTE).
- FIG. 17 is a graph that shows the ORAC(o) values of the combination of the maximum quercetimmixed tocopherol and the grape seed extract and green tea extract ratios. It was found that the combined quercetin and mixed tocopherols, GSE, GTE maximized the anti-oxidant potential of the supplement.
- EXAMPLE 4 Antioxidant Effect of AMBROTOSE AOTM in a Small Number of Healthy Individuals, Open Label Study, Non-Placebo controlled.
- An antioxidant is defined as any substance that can delay or prevent the oxidation of biological substrates.
- GN supplements glyconutritional (GN) supplements
- nutritional supplements providing sugars that support cellular communication and immune function
- antioxidant properties both in vitro and in vivo.
- Rat liver cells grown in culture medium containing GN supplements showed higher levels of reduced glutathione relative to controls, thereby demonstrating increased antioxidant protection.
- a pilot clinical study demonstrated a reduction in biomarkers of oxidative stress and an increase in biomarkers of oxidative defense in people consuming GN supplements. Significant increases were observed in total iron-binding capacity and folic acid, and a significant decrease was observed in copper/ceruloplasmin ratio within 76 days following the daily addition of 2 gr GN supplement to the normal diet.
- This method uses ⁇ -phycoerythrin, a fluorescent probe, to determine the antioxidant scavenging capacity of serum samples, specifically against peroxyl radicals, when compared to a known standard, Trolox®. The results are expressed in micromoles Trolox Equivalents (TE) per gram. 18 Other standardized analytical techniques used in the study were the measurement of urine lipid hydroperoxides and alkenals, which relate indirectly to the amount of free radical damage to lipids, and urine 8-OHdG, which relates indirectly to DNA damage. 19 ' 20 ' 21 The antioxidant nutritional supplement used in this study, Ambrotose AOTM, was developed using an in vitro evaluation of ingredients: quercetin, mixed tocopherols, grape extract, green tea extract, the Australian plum.
- the in vitro antioxidant values of each ingredient were determined using the standard ORAC i method (which uses a different fluorescent probe, fluorescein).
- the antioxidant values of the ingredient mixtures were determined using a newly developed method that measures dissolved oxygen directly, the ORAC 0 . Since lipid- and water-soluble antioxidants work in concert in vivo, the ORAC 0 , which simultaneously measures the contributions and interactions of lipid- and water- soluble compounds, is an improvement over fluorescence-based methods (ORAC f i, ORACfi-iipo and ORACp-PE). These methods, at best, measure the activities of lipid- or water-soluble compounds alone.
- ORAC 0 therefore provides a more accurate determination of the total in vitro antioxidant activity of a blend of both water- and lipid-soluble ingredients.
- the water and lipid-soluble ingredients were combined and evaluated with the ORACo to establish maximal synergy and the optimal in vitro ORAC 0 value of the blend.
- the subsequent blend was roller-compacted with Ambrotose® complex at a ratio of 1 :2 to create Ambrotose AOTM.
- Many of the natural gums in Ambrotose® have been used to control the release of compounds providing a sustained delivery.
- the specific product development is the subject of a separate publication and a United States patent application.
- the twelve study subjects had morning fasting serum ORACp- PE and urine analyses performed after an initial washout period of 2 weeks on no supplements and at the end of 2 weeks on each increasing amount of the antioxidant supplement.
- the amounts used were 500 mg (1 capsule) each day for the first 14 days of supplement use (Period 1), l.Og (2 capsules) each day for the second 14-day period (Period 2), and 1.5 g (3 capsules) each day during the third 14-day period (Period 3).
- a blood and urine sample from the individual not consuming supplements was analyzed in triplicate to test the precision of the analyses. Blood and urine samples were collected by the independent phlebotomist, immediately packed in dry ice and transported to a local hospital laboratory for preparation.
- ORAC Values and Percent Change from Baseline Data The ORAC ⁇ _PE values and percentage change from baseline for the twelve participants taking Ambrotose AOTM are given in Table 6. Baseline is after the 2-week washout, Period 1 after 2 weeks on 500 mg, Period 2 after 2 weeks on 1.0 g and Period 3 after 2 weeks on 1.5 g. Serum vial labels of some Period 2 samples became detached during shipping to Genox. ORAC ⁇ .pE values could only be specifically assigned to three of the study participants for this period and not for the rest of the study participants or the additional non-study individual.
- the average lipid hydroperoxide, total alkenal and 8-OHdG values are summarized in Table 8. They are corrected for urine concentration variability by dividing by urine creatinine as measured at the same time on the same sample. Air Quality. Air quality is known to affect levels of oxidative stress. Increasing concentrations of common pollutants, such as ozone and nitrogen dioxide, decrease air quality. This leads to a greater potential for the generation of ROS. 24 ' 25 . A summary of the average U.S. Environmental Protection Agency (EPA) air quality indexes for each two- week period in the Dallas/Fort Worth (DFW) area, where the subjects lived, is given in Table 6.
- EPA U.S. Environmental Protection Agency
- the EPA uses color codes for area air quality maps: Green: “Good” (0 - 79 parts per billion [ppb] ozone), Yellow: “Moderate” (80 - 99 ppb), Orange: "Unhealthy for Sensitive Groups” (100 - 124 ppb), Red: “Unhealthy”(125 - 149 ppb) and Purple: “Very Unhealthy” (greater than 150 ppb).
- a numerical value for each daily EPA map of the study area was calculated by assigning numbers to the colors: Green: 1, Yellow: 2, Orange: 3, Red: 4 and Purple: 5 and estimating the numerical average for each day based on the area of each color on the published EPA maps. The daily numerical values were then averaged for each two-week period of the study (Table 9).
- Serum ORAC ⁇ .p E is a measure of the antioxidant protection of the blood in regard to its ability to quench free radicals at the time of the measurement.
- Urine lipid hydroperoxides are a marker of lipid oxidative damage at some time in the past. The temporal relationship between the actual lipid damage and the appearance of lipid hydroperoxides in the urine is not well defined. It may well be that these temporal differences account, in part, for this variance.
- urine 8-OHdG and alkenals were also measured at each time period. No significant differences nor trends were observed. This again may relate to the temporal relationship between actual lipid and DNA damage and the appearance of the biomarkers in the urine. Participants in the study lived in the DFW area. The published EPA daily air quality assessments for DFW were averaged for each 2-week period. Air quality was getting worse over the course of the study. This would normally be expected to increase oxidative stress by increasing ROS and hence increasing biomarkers of oxidative damage, such as lipid hydroperoxides. 29 On the contrary, increased protection was evident as measured by increased serum ORAC values.
- Vivekananthan DP Penn MS, Sapp SKI et al. Use of antioxidant vitamins for the prevention of cardiovascular disease: meta-analysis of randomised trials. Lancet. 2003;361(9374):2017-2023. 4. Morris CD, Carson S. Routine vitamin supplementation to prevent cardiovascular disease: a summary of the evidence for the U.S. Preventive Services Task Force. Ann Intern Med. 2003;139(l):56-70. 5. Boileau TW, Liao Z, Kim S, et al. Prostate carcinogenesis in N-methyl-N- nitrosourea (NMU)-testosterone-treated rats fed tomato powder, lycopene, or energy- restricted diets. JNatl Cancer Inst.
- NMU N-methyl-N- nitrosourea
Abstract
Description
Claims
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