WO1996028167A1 - Compositions comprising nicotynylalanine and an inhibitor of glycine conjugation or vitamin b6 - Google Patents
Compositions comprising nicotynylalanine and an inhibitor of glycine conjugation or vitamin b6 Download PDFInfo
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- WO1996028167A1 WO1996028167A1 PCT/US1996/003435 US9603435W WO9628167A1 WO 1996028167 A1 WO1996028167 A1 WO 1996028167A1 US 9603435 W US9603435 W US 9603435W WO 9628167 A1 WO9628167 A1 WO 9628167A1
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- composition
- nicotinylalanine
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/60—Salicylic acid; Derivatives thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
- A61K31/455—Nicotinic acids, e.g. niacin; Derivatives thereof, e.g. esters, amides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/465—Nicotine; Derivatives thereof
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/60—Salicylic acid; Derivatives thereof
- A61K31/618—Salicylic acid; Derivatives thereof having the carboxyl group in position 1 esterified, e.g. salsalate
- A61K31/621—Salicylic acid; Derivatives thereof having the carboxyl group in position 1 esterified, e.g. salsalate having the hydroxy group in position 2 esterified, e.g. benorylate
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A—HUMAN NECESSITIES
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
Definitions
- This invention relates to methods and compositions useful for reducing cellular toxicity, in vitro and/or in vivo, associated with increases of poly-(ADP)-ribosylation reactions.
- This invention also relates to pharmaceutical compositions useful for treating diseases for which increasing endogenous concentrations of nicotinamide provide a therapeutic benefit, and methods of treating disease using these compositions.
- this invention relates to compositions comprising
- nicotinamide and optionally B6.
- B6 nicotinamide
- compositions of this invention B6 may be substituted for the glycine conjugate inhibitor.
- the diseases for which the compositions and methods of this invention provide a therapeutic benefit involve poly (ADP)-ribosylation
- Such diseases include neurodegenerative diseases, infectious diseases, cancer and certain forms of diabetes. BACKGROUND OF THE INVENTION
- Nitric oxide is produced in a variety of cell types including neurons and blood endothelial cells.
- Nitric oxide is also significant as a possible pathogenic agent for multiple populations of cells because, besides being toxic to the cells in which nitric oxide is
- nitric oxide is also released into blood where it acts as a "local hormone", id.
- nitric oxide is capable of readily passing across cell membranes into adjacent cells. Id.
- nitric oxide in neurons occurs in response to over-stimulation of NMDA receptors by naturally occurring excitotoxic agents present in the brain including, for example, glutamic and quinolinic acids. Inhibitors of nitric oxide production provide protection against the pathogenic effects of the excitatory agents. Dawson V.L., et al., Proc. Natl. Acad. Sci., U.S.A., 88:6368-6371, 1991.
- HIV-1 coat protein gP120
- Enhancement of poly-(ADP)-ribosylation has also been reported to be associated with the pathogenesis of certain forms of diabetes. Destruction of the beta cells of the pancreas, which cells make and release insulin, is also associated with nitric oxide toxicity resulting in
- nicotinamide and a number of benzamide derivatives are effective inhibitors of poly (ADP-ribose) synthetase.
- concentrations of these compounds are required to achieve sufficient intracellular uptake and localization to appropriate intracellular target organelles such as the nucleus.
- Nicotinamide is an intermediate in the metabolism of the amino acid tryptophan to nicotinamide adenine
- Tryptophan is metabolized by the kynurenine pathway, illustrated below, which branches to produce the excitotoxin quinolinic acid or nicotinamide which is subject to glycine conjugation to produce nicotinuric acid. In the kynurenine pathway, tryptophan is converted by two sequential enzymatic reactions to kynurenine.
- Kynurenine is then converted either to kynurenic acid by the enzyme kynurenine transaminase, or to 3-hydroxykynurenine by the enzyme kynurenine hydroxylase.
- the enzyme kynureninase then converts 3-hydroxykynurenine to 3-hydroxyanthranilic acid, an intermediate in the production of the excitotoxin quinolinic acid. Indeed, substrate nonspecificity of the mammalian enzyme
- kynureninase (EC 3.7.1.3) is documented in the literature. Besides the two natural substrates already listed, other naturally occurring and synthetic substrates exist. For example, kynureninase also splits some ⁇ -oxy-aliphatic amino acids as well as some ⁇ -oxy-phenyl amino acids (Wiss O. and Fuchs H., Experientia. 12:472-473, 1950). It is this nonspecificity of the enzyme which may be used to therapeutic advantage by the design of drugs as potential substrates.
- kynureninase As a substrate for the enzyme kynureninase, nicotinylalanine is itself converted to nicotinamide.
- Nicotinylalanine has an asymmetric carbon atom and
- This enzyme-inhibitory activity of nicotinylalanine is discussed as the basis for the use of nicotinylalanine to protect against the neurotoxicity associated with metabolism of tryptophan and production of quinolinic acid in Pellicciari, R., et al.. International application WO 91/17750.
- This invention provides methods and compositions for reducing cellular toxicity, in vitro and/or in vivo, associated with poly-(ADP)-ribosylation reactions.
- compositions of this invention comprise at least one compound of Formula II, such as
- nicotinylalanine and an inhibitor of glycine conjugation associated with the metabolism of nicotinamide, and/or at least one B6 vitamin.
- Compounds of formula II are as follows:
- R 1 , R 2 , and R 3 are independently, the same or different and may be selected from the group consisting of hydrogen, halogen, amino, nitro, hydroxyl, ethoxycarbonyl, carboxyl, carbanoyl, carbanoyloxy, and an optionally substituted C 1-2 alkyl wherein the alkyl group may be substituted with a halogen, amino, nitro, or hydroxyl group;
- B is either a bond, NH or oxygen
- A is selected from -CNH 2 COOHR 4 and DR 5 R 6 R 7 , and wherein D is a carbon or nitrogen atom and
- R 4 is selected from hydrogen; halogen; amino; nitro; hydroxyl; ethoxycarbonyl; carboxyl; carbanoyl;
- carbanoyloxy an optionally substituted C 1-2 alkyl wherein the alkyl group may be substituted with a halogen, amino, nitro, or hydroxyl group; a side chain of a naturally occurring amino acid optionally substituted at the a carbon with H or any of a series of heterocyclic
- R 5 , R 6 and R 7 are the same or different and are selected from the group consisting of C 1-4 alkyl, hydrogen, and phenyl, pyridinyl, imidazolyl or indolyl; COOCH 2 R 8 wherein R 8 is selected from the group consisting of phenyl, pyridinyl, imidazolyl, and indolylyl, and wherein n is 0, 1, 2 or 3.
- the cellular concentration of nicotinamide is increased by providing a combination of pyridoxine hydrochloride (B6) with
- compositions are effective in vitro for cultured cells possessing the potential or actual property of an
- composition is
- the inhibitor of glycine conjugation is aspirin.
- compositions and methods of this invention are useful for treating individuals, including humans, having at least one pathological condition for which activation of poly (ADP-ribose) synthetase is a contributory factor.
- pathological condition for which activation of poly (ADP-ribose) synthetase is a contributory factor include various neurodegenerative, infectious, neoplastic, and autoimmune diseases.
- Specific diseases for which the compositions and methods of this invention would be expected to provide a therapeutic benefit include, for example, epilepsy, neurotoxicity associated with vascular stroke,
- Huntington's Disease Alzheimer's Disease, Parkinson's Disease; a variety of viral diseases including AIDS;
- diabetes mellitus type 1 various cancers; and diabetes mellitus type 1.
- this invention enables target specific increases in nicotinamide to be achieved using comparatively lower doses of
- nicotinylalanine or an analogue thereof, and results in decreased production and activity of excitotoxic amino acids.
- compositions of this invention which include inhibitors of glycine conjugation and/or B6, provide further increases in cellular nicotinamide
- compositions which decrease activity of poly (ADP-ribose) synthetase and decrease the synthesis and activity of excitotoxic amino acids.
- Figure 1 Disease Stage Scores for Survival Groups of Mice Treated with Nicotinylalanine (NAL) and/or Aspirin (ASA) and/or 3 '-Azidothymidine (AZT).
- NAL Nicotinylalanine
- ASA Aspirin
- AZA Aspirin
- ZT 3 '-Azidothymidine
- Each value represents the mean and one standard standard deviation for groups of surviving mice (at least 4 mice per group) at termination of the study, following 28 weeks post-inoculation by LP-BM5 virus.
- Asterisks indicate statistically significant differences, as compared to the LP-BM5 vehicle-treated controls.
- the virus-negative control group is included, as a reference for normal spleen weight in this group of mice randomly selected and housed under identical conditions as the virus-inoculated experimental groups. See Legend, Figure 1, for data representation and statistical analysis. * indicates a mean value that was statistically different from the virus-positive (LP-BM5) control group in pairwise comparisons using Newman Keuls test, p ⁇ 0.05.
- Figure 3 Spleen to Body Weight Ratio for Survival Groups of Mice Treated with Nicotinylalanine (NAL) and/or Aspirin (ASA) and/or 3'-Azidothymidine (AZT). Values were
- Figure 4A and 4B Mean Number of Virus Particles as Determined from Plaques per Million Spleen Cells from Serially Sacrificed Mice at Monthly Intervals After
- mice as shown in these comparisons were injected intraperitoneally (i.p.) with Pool 66 of LP-BM5 murine leukemia virus on Day 1 of the study, with a known dilution of the virus pool which previously resulted in 100% of inoculated mice developing MAIDS.
- Each ml of the virus pool contained 3.66 log PFU ecotropic virus as determined by XC Plaque Assay.
- FIG. 5 Attainment of Disease Score of 4 in LP-BM5 Mice Treated with Nicotinylalanine (NAL) and/or Aspirin (ASA) and/or 3'-Azidothymidine (AZT), as Compared to Control Virus-Positive Mice Treated PBS-Vehicle Only.
- NAL Nicotinylalanine
- ASA Aspirin
- AZA 3'-Azidothymidine
- FIG. 6 Survival of LP-BM5 MuLV Retrovirus Infected Mice Treated with Nicotinylalanine (NAL) and/or Aspirin (ASA) and/or 3'-Azidothymidine (AZT), as Compared to Control Virus-Positive Mice Treated PBS-Vehicle Only.
- NAL Nicotinylalanine
- ASA Aspirin
- AZA 3'-Azidothymidine
- FIG. 7 Plasma concentration of nicotinylalanine (NAL) obtained after i.v., i.p., and p.o. administration of NAL at dosages of 400 mg/kg body weight. Data shown are replicate samples taken from three mice at each time point.
- NAL nicotinylalanine
- FIG. 8 Plasma concentrations of nicotinylalanine (NAL, open triangles), the nicotinylalanine metabolite (NAL-X, open circles) and nicotinamide (closed triangles), following a single oral dose of NAL at 400 mg/kg body weight. Data shown are replicate samples taken from three mice at each time point.
- compositions comprising nicotinylalanine [NAL, ⁇ -(3-pyridyl)- ⁇ -oxo- ⁇ -aminobutyrate], or an analogue of nicotinylalanine, in combination with at least one inhibitor of glycine
- nicotinamide such as acetylsalicylic acid (ASA, aspirin) which are useful for reducing cellular toxicity by increasing endogenous concentrations of nicotinamide.
- endogenous concentrations of nicotinamide are increased by providing cells nicotinylalanine, or a related analogue, and pyridoxine hydrochloride or pyridoxal (B6), and optionally an inhibitor of glycine conjugation.
- pyridoxal or another form of B6 purportedly can be administered chronically in oral dosages.
- Other methods of administering B6 may also be used with this invention and are known to those in the art.
- increased cellular levels of active B6 may be made available as cofactor in the kynureninase catalyzed conversion of nicotinylalanine (or its analogues) to nicotinamide.
- compositions of this invention which reduce cellular toxicity are believed to act by directly or indirectly reducing the activity of poly (ADP-ribose) synthetase or other poly (ADP)-ribosylation reactions.
- Increases of cellular nicotinamide are provided according to this invention by providing to cells the compositions of this invention comprising nicotinylalanine and an inhibitor of glycine conjugation.
- cells in vitro or in vivo, are exposed to soluble nicotinylalanine, or a suitable analogue described below, and the inhibitor of glycine conjugation.
- Nicotinylalanine is then endogenously converted to
- nicotinamide particularly in those cells in which the kynurenine pathway is induced by cytokines and/or by mediators of disease processes.
- nicotinylalanine also may be converted to nicotinamide, or to other compounds which are effective for inhibiting either or both of kynurenine hydroxylase and kynureninase and may also be substitutes for glycine conjugation and also inhibit poly-(ADP)-ribosylation reactions
- cells in vitro, cells may be exposed to any non-toxic buffer or medium in contact with the cells.
- cells In vivo, cells are generally in contact with a physiologic fluid such as for example, blood, plasma, lymph, cerebral spinal fluid, or
- the methods and compositions of this invention may also result in detectable increases of the concentration of nicotinamide present in plasma. Such increases may be used to monitor the effectiveness of the compositions and methods of this invention for increasing nicotinamide and the adequacy of specific dosing protocols.
- compositions of this invention are useful for reducing cellular toxicity of cells in vitro or in vivo which possess the potential or actual property of an inducible kynurenine pathway.
- examples of such cells include, but are not limited to cells of the
- monocyte/macrophage lineage or cells of a transformed (e.g. cancer cell) lineage.
- compositions of this invention which reduce cellular toxicity are also useful as treatments for diseases in animals, including humans, which are
- nicotinamide niacinamide
- nitric oxide mediates the excitotoxic cell death of glutamate or related
- excitotoxins such as quinolinate (e.g., some forms of epilepsy, neurotoxicity associated with vascular stroke, Huntington's Disease, some forms of Alzheimer's Disease, some forms of schizophrenia and some forms of Parkinson's Disease); (2) a variety of infectious diseases including bacterial or viral diseases in which activation of cellular immunity and the inflammatory response involving macrophages characterize a chronic state of the disease process (e.g., Acquired Immune Deficiency Syndrome, AIDS); (3) various cancers in combination with radiation therapy; and (4) diabetes mellitus type 1
- IDDM insulin-dependent diabetes mellitus
- NAm nicotinamide
- PARP poly- (ADP-ribose) polymerase
- compositions of the invention comprise
- nicotinylalanine and a glycine inhibitor suitable for decreasing the glycine conjugation of nicotinamide associated with its metabolism.
- Conjugation in the liver and kidney with glycine is an important mechanism for excretion of various carboxylic acids - both natural biochemical metabolites and drugs (Hutt A.J. & Caldwell, J. In: Conjugation Reactions in Drug Metabolism, Mulder, G.J. , editor, 1995, p. 273-305.
- conjugation as part of the kynurenine pathway is not limited to the liver or kidney cells.
- nicotinic acid may be converted either to nicotinamide or, via glycine conjugation, to nicotinuric acid. Inhibition of glycine conjugation therefore enhances nicotinamide by both directly reducing
- R 1 , R 2 , and R 3 are independently, the same or different and may be selected from the group consisting of hydrogen, halogen, amino, nitro, hydroxyl, ethoxycarbonyl, carboxyl, carbanoyl, carbanoyloxy, and an optionally substituted C 1-2 alkyl wherein the alkyl group may be substituted with a halogen, amino, nitro, or hydroxyl group;
- B is either a bond, NH or oxygen
- A is selected from -CNH 2 COOHR 4 and DR 5 R 6 R 7 , and wherein D is a carbon or nitrogen atom and
- R is selected from hydrogen; halogen; amino; nitro; hydroxyl; ethoxycarbonyl; carboxyl; carbanoyl;
- carbanoyloxy an optionally substituted C 1-2 alkyl wherein the alkyl group may be substituted with a halogen, amino, nitro, or hydroxyl group; a side chain of a naturally occurring amino acid optionally substituted at the a carbon with H or any of a series of heterocyclic
- R 5 , R 6 and R 7 are the same or different and are selected from the group consisting of C 1-4 alkyl, hydrogen, and phenyl, pyridinyl, imidazolyl or indolyl; COOCH 2 R 8 wherein R 8 is selected from the group consisting of phenyl, pyridinyl, imidazolyl, and indolylyl, and wherein n is 0, 1, 2 or 3.
- compositions of the invention may also comprise mixtures of nicotinylalanine or at least one of the analogues described above. Since the embodiment of the invention is to generate enhanced nicotinamide levels in cells, while inhibiting formation of excitotoxins of the kynurenine pathway, it will be recognized that at least two general classes of compounds 3-pyridyl-carboxylates wherein B is a bond, or 3-pyridyl-carboxamides wherein B is NH may satisfy these conditions as a general principle.
- R 1 , R 2 and R 3 are selected from hydrogen, methyl, ethyl, halogen, amino, nitro, hydroxyl, ethoxycarbonyl, carboxyl, carbamoyl, carbamoyloxy;
- A represents an alkyl- ⁇ -amino carboxylic acid bound to B or (CH 2 ) n by the ⁇ carbon optionally substituted at the a carbon with H or any of a series of heterocyclic groupings, including pyridinyl, imidazolyl, phenyl, or indolyl, and n is 0, 1, 2, or 3.
- analogues of nicotinylalanine which relate to the inhibition of cellular toxicity as described by the invention, and which are suitable for use in this invention are wherein R 1 , R 2 and R 3 are as defined above, n is 0, 1, 2 or 3, and A is selected from the group consisting of glycinyl, alanyl (nicotinylalanine), methoxyalanyl (nicotinylmethoxyalanine),
- n 0, 1, 2 or 3
- A is selected from the group consisting of glycinyl, optionally substituted with pyridine-3-carboxylic acid or pyridine- 2,3-carboxylic acid, phenylalanine, tyrosine, tryptophan and histidine.
- Useful analogues may be prepared according to methods disclosed in the literature (Iselin B.M., et al., J. Am. Chem. Soc. 72:1729-1731, 1950; Sperber N. et al., J. Am. Chem. Soc. 72:2012-2015, 1950) when n is 1 or 2, and A is alanyl; methoxyalanyl; ⁇ -methyleneglutamate; orthinine, arginine or lysine; serine, threonine, or valine; leucine or isoleucine.
- the preferred embodiment of this invention uses aspirin (sodium acetylsalicylic acid) as a substrate of the mitochondrial glycine
- inhibitors of glycine conjugation include, for example, sodium benzoate, sodium phenylacetate, sodium 1- napthylacetate, sodium isovalerate, and bromosulfothalem (BSP).
- Preferred inhibitors of glycine conjugation include aspirin, sodium benzoate, and sodium
- vitamin B6, or another substance capable of increasing plasma concentrations of B6, in combination with nicotinylalanine, and/or a related analogue and optionally an inhibitor of glycine conjugation is used to increase nicotinamide concentrations.
- Various sources of B6 including pyridoxal are described in Serfontein U.S. Patent 5,254,572 which is incorporated in its entirety herein by reference.
- nicotinylalanine alone. This is demonstrated in the examples (see Table 4) in retrovirus-infected (MAIDS) mice. Potentiation by aspirin is due to the fact that both nicotinic acid (an immediate precursor to
- nicotinamide and aspirin are degraded by glycine
- nicotinuric acid are consistent with some metabolism of nicotinamide by glycine conjugation.
- administration is likely due to a combined competitive inhibition of glycine conjugation degradation of nicotinic acid and nicotinamide.
- composition of this invention consisting of for example nicotinylalanine and aspirin is believed to result from an enhancement of cellular nicotinamide levels which then act as natural inhibitors of poly(ADP-ribose) synthetase and related poly(ADP)-ribosylation reactions.
- the methods and compositions of this invention are particularly advantageous because they provide a means of targeting drug action to specific tissues involved in the disease process.
- Activation of specific enzymes in the kynurenine pathway particularly, indoleamine-2,3-dioxygenase (IDO), and subsequently kynurenine hydroxylase and kynureninase (3-hydroxykynureninase) occurs as a consequence of various disease processes.
- IDO indoleamine-2,3-dioxygenase
- kynurenine hydroxylase and kynureninase 3-hydroxykynureninase
- compositions of this invention are useful for reducing poly-(ADP)-ribosylation reactions which may be activated by nitric oxide, or other substances, contribute to cellular
- this invention could reasonably be expected to be useful in the treatment of any disease having a pathology resulting from, at least in part, poly-(ADP)-ribosylation reactions.
- diseases include neurodegenerative diseases, infectious diseases,
- 3'azido-3'deoxythymidine (AZT) and its analogues which act as retroviral reverse transcriptase inhibitors, are useful agents in the treatment of HIV-1 infection and AIDS and could be used in combination with the compositions of this invention.
- the value of these combinations is provided in the Examples, wherein
- nicotinylalanine in combination with AZT has equal or better efficacy than AZT alone in the treatment of
- nicotinylalanine in combination with inhibitors of glycine conjugation and/or in combination with vitamin B6, or another substance capable of increasing B6, would also be expected to have efficacy in combination with AZT.
- neurodegenerative component depends, at least in part, upon excitotoxic pathogenic mechanisms.
- diseases are reviewed in Bruhyler J., et al., Neurosci. Behav. Rev., 17:373-384 (1993) and Coyle, J.T., et al., Science. USA, 262:689-700 (1993) and include, for example, various forms of epilepsy, Huntington's disease,
- compositions and/or methods of this invention are used to treat individuals infected with virus and in whom the viral infection has resulted in activation of poly(ADP)-ribosylation reactions. For example, targeting increases in nicotinamide to
- HIV-infected cells could be achieved by relying on the induction of the tryptophan pathway in activated
- macrophages are a major reservoir of virus and are thought to play a prominent role in pathogenesis of AIDS (Mosier D. and Sieburs H., Immunology Today, 15:332-339, 1994).
- cytotoxic phenomena associated with activated macrophages including brain microglial cells
- interferon-gamma in combination with other cytokines also induces nitric oxide production which then mediates a variety of cellular injuries and cell death (Lorsbach R.B., et al., J. Biol. Chem., 268:1908-1913, 1993; Chao C.C., et al., J. Immunol., 149:2736-2741, 1992.
- IFN- ⁇ interferon-gamma
- IDO indoleamine 2,3-dioxygenase
- This invention utilizes this substantially enhanced molecular flux in the kynurenine pathway and the fact that nicotinylalanine, and related analogues, act as an
- nicotinylalanine 200-400 mg/Kg
- aspirin 20 mg/Kg
- nicotinamide pharmacotherapy In addition to AIDS and neurologic diseases, other conditions would be expected to benefit from nicotinamide pharmacotherapy. These include treatments of various tumors in combination with carbogen or with radiation therapy (Dorie M.J., et al.. Int. J. Radiat. Onc. Biol. Phys., 28, 145-150, 1994) and in the prevention of
- IDDM insulin-dependent diabetes mellitus
- nicotinamide enhances radiation or carbogen (95% 02 - 5% CO2) damage to human tumors may be related to increased blood flow to the tumors (Lee I. & Song C.W., Rad. Res., 130:65-71, 1992; Dorrie M.J., et al.. Int. J. Rad. Oncol. Biol. Phys., 28:145-150, 1994) or could be due to protection of normal cells from NAD depletion due to radiation or carbogen induced DNA strand breaks resulting in activation of poly(ADP-ribose) polymerase reactions (Ben-Hur E., et al., Cancer Res., 45:2123-2127, 1985).
- nicotinylalanine specifically enhances nicotinamide synthesis within activated macrophages
- the cell lines in which the kynurenine pathway is induced are generally
- compositions and methods of this invention can protect against cell death (e.g., cells in which nicotinamide or NAD become limiting); or provide a means of limiting cell growth (e.g., cells in which induction of poly (ADP)-ribosylation reactions contribute to increased cell proliferation).
- cell death e.g., cells in which nicotinamide or NAD become limiting
- a means of limiting cell growth e.g., cells in which induction of poly (ADP)-ribosylation reactions contribute to increased cell proliferation.
- nicotinylalanine is useful as a prodrug because it is metabolized to nicotinamide and inhibitors of glycine conjugation such as aspirin act to further enhance
- nicotinamide levels by preventing degradation of nicotinic acid (see Pathway) and to some extent preventing
- This invention provides novel compositions and methods using an established drug (nicotinylalanine, or related analogue) with little known toxicity in order to substantially enhance tissue and cellular levels of nicotinamide, and thereby modulating cell function and the chronicity and severity of these diseases.
- This invention also provides effective levels of kynurenic acid (KYNA) as an NMDA receptor antagonist, while concurrently lowering
- nicotinylalanine treatment will obviate the less effective treatment with exogenous (oral or injectable) nicotinamide and will provide a more directed increase in nicotinamide at tissue and cellular sites of disease and or inflammation.
- exogenous (oral or injectable) nicotinamide will provide a more directed increase in nicotinamide at tissue and cellular sites of disease and or inflammation.
- these benefits of nicotinylalanine treatment are applicable to other
- N-methylnicotinamide levels in the urine of rats treated with nicotinylalanine are at least 5 fold.
- nicotinylalanine preferably is administered as the 2S isomer, as the free base or as one of its
- conjugation inhibitor and/or B6 or another substance which causes an increase in B6.
- B6 conjugation inhibitor, and/or B6 or another substance which causes an increase in B6.
- the nicotinylalanine and glycine conjugation inhibitor are administered together as a single formulation, however this invention also includes their separate administration both as individual formulations and at different times.
- this invention also includes their separate administration both as individual formulations and at different times.
- results from studies in a mouse model of AIDS are consistent with efficacy of a parenteral dose in humans of
- nicotinylalanine between about 100 and 200 mg/kg body weight per day in combination with aspirin at about 20 mg/kg per day.
- Chronic (i.e., daily, Mon. - Fri., for more than four month duration) intraperitoneal injections of racemic NAL (400 mg/kg) into C57BL/6 mice (MAIDS Study) have not been associated with obvious behavioral toxicity.
- an acute dose of 500 mg/kg of a racemic mixture of NAL has been reported not to result in any behavioral effects in rats. Connick J.H., et al., Gen. Pharmac., 23:235-239, 1992.
- NAm nicotinamide
- nicotinylalanine may be administered in doses between about 10 and 200 mg/kg total dose/day as the active (2S) isomer. Accordingly, for humans preferred median-effective divided doses which could be administered by mouth would be equivalent to approximately 1800 mg Q.I.D. for a 70 kg person in combination with 650 mg (10 grains) of aspirin. This is similar to single doses of nicotinamide given orally to cancer patients of 6000 mg (6 grams) in combination with radiation (Stratford and Dennis, 1992, ibid).
- dosages are expected to be similar to the above or lower depending upon the patient's condition and the nature and severity of the disease.
- tetrahydrofurane (THF) is used in this malonic ester condensation, since it dissolves the sodium
- dihydrochloride salt of nicotinylalanine the natural L steric configuration (2S) is preferred (Decker, et al., 1963, supra) and tartaric acid methods for resolution of the dextrorotary 2S product are suitable for resolving the pure isomer.
- compositions of this invention comprise:
- nicotinylalanine or a related analogue as described above, or a mixture thereof, and, either or both B6 and the inhibitor of glycine conjugation in an amount such that their combined effect increases the concentration of cellular or plasma nicotinamide.
- nicotinamide concentration of any tissue including blood, plasma or urine or organ may be used to monitor the effect of treatment in accordance with this invention. Any increase in nicotinamide concentration above control levels as a result of administering the composition of this invention are within the scope of this invention.
- tissue nicotinamide concentrations as reflected in plasma of between about 0.5 and 20 nM/ml could be expected to be therapeutic.
- Preferred concentrations are between about 1.0 and 10.0 nM/ml; and more preferred concentrations are between about 2.0 and 5.0 nM/ml.
- compositions comprise between about 0.5 and about 5.0 grams nicotinylalanine and between about 0.2 and about 2.0 grams aspirin. More preferably the
- compositions comprise between about 1.0 and about 4.0 grams nicotinylalanine and between about 0.5 and about 1.5 grams aspirin. Most preferred is about 1.0 gram
- nicotinylalanine and about 0.5 grams of aspirin. Dosages may be modified or adapted by methods known to those skilled in the art dependent on whether an analogue of nicotinylalanine is used.
- the dosage schedule of this component if administered orally, could be two tablets Q.I.D., preferably taken with food. Therefore, the daily dosage of the most preferred composition should yield blood plasma levels for nicotinylalanine of preferably between about 200 to 1000 nmoles/ml plasma and for aspirin of between about 100 and 200 nmoles/ml plasma,
- B6 is preferably administered at a dose of about 0.2-1.0 mg/kg (when administered as the
- hydrochloride salt hydrochloride salt
- the method of increasing nicotinamide may be
- Nicotinylalanine administered orally has a t% of about 60 minutes compared to only about 40 minutes and 25 minutes when administered i.v. or i.p., respectively (Figs. 7 and 8; Table 5). Bioavailability is apparently greater however when the i.p. route is used compared to either the i.v. or oral routes. Based on these surprising results it may therefore be preferable to use both oral and i.p.
- compositions of this invention may also comprise adjuvant substances and carriers.
- the compositions may be in the form of tablets, capsules, powders, granules, lozenges, suppositories,
- reconstitutable powders, or liquid preparations such as oral or sterile parenteral solutions or suspensions.
- composition of the invention is in the form of a unit dose.
- Unit dose presentation forms for oral administration may be tablets and capsules and may contain conventional excipients such as binding agents, for example syrup, acacia, gelatin, sorbitol, tragacanth, or
- polyvmylpyrrolidone fillers, for example lactose, sugar, maize-starch, calcium phosphate, sorbitol or glycine;
- disintegrants for example starch, polyvmylpyrrolidone, sodium starch glycolate or microcrystalline cellulose; or pharmaceutically acceptable wetting agents such as sodium lauryl sulphate.
- the solid oral compositions may be prepared by conventional methods of blending, filling, tabletting or the like. Repeated blending operations may be used to distribute the active agent throughout those compositions employing large quantities of fillers. Such operations are of course conventional in the art.
- the tablets may be coated according to methods well known in normal
- Oral liquid preparations may be in the form of, for example, emulsions, syrups, or elixirs, or may be
- Such liquid preparations may contain conventional additives such as suspending agents, for example sorbitol syrup, methyl cellulose, gelatin, hydroxyethylcellulose,
- carboxymethylcellulose aluminum stearate gel
- non-aqueous vehicles which may include edible oils
- vegetable oils for example almond oil fractionated coconut oil, oily esters such as esters of glycerine, propylene glycol, or ethyl alcohol
- preservatives for example methyl or propyl p-hydroxybenzoate or sorbic acid
- fluid unit dosage forms are prepared utilizing the compound and a sterile vehicle, and, depending on the concentration used, can be either suspended or dissolved in the vehicle.
- the compound can be dissolved in water for injection and filter sterilized before filling into a suitable vial or ampoule and sealing.
- adjuvants such as a local anaesthetic, a preservative and buffering agents can be dissolved in the vehicle.
- the composition can be frozen after filling into the vial and the water removed under vacuum.
- Parenteral suspensions are prepared in substantially the same manner, except that the compound is suspended in the vehicle instead of being dissolved, and sterilization cannot be accomplished by filtration.
- the compound can be sterilized by exposure to ethylene oxide before suspending in the sterile vehicle.
- a surfactant or wetting agent is included in the composition to facilitate uniform distribution of the compound.
- HPLC High pressure liquid chromatography
- Nicotinylalanine and at least one of its metabolic products was also found to be
- mice C57BL/6 females, approximately 18 to 22 grams were housed in microisolator cages for one week prior to the study and then randomized into treatment groups with 8 animals in each group. Preformulation protocols for preparation of parenteral administration of the NAL-ASA combination into mice have followed guidelines outlined in Remington's Pharmaceutical Sciences Handbook, 18th
- mice were treated with racemic nicotinylalanine alone (400 mg/kg) or in combination with acetyl salicylic acid (ASA) at a dose of either 20 mg/kg or 100 mg/kg body weight.
- Mice were administered the drug composition in 0.02 ml/g body weight of nicotinylalanine dihydrochloride (27.4 mg/ml) mtraperitoneally and the pH of the solutions were adjusted to between 6.8 to 7.4.
- compositions being phosphate buffered saline (PBS), at the same volume on the same dose schedule as the drug-treated mice.
- Chronic dosing was performed daily for two weeks, Monday through Friday, and one group of mice received only a single (acute) dose of nicotinylalanine. All mice were killed two hours after their final dose and blood was collected by cardiac puncture and stored on ice, until centrifugation in a microfuge at 10,000 rpm to obtain plasma.
- PBS phosphate buffered saline
- nicotinylalanine metabolite (NAL-X) were determined in the same way as above, except peaks were compared to the standard curve for known nicotinylalanine. The results are expressed as nanomoles of nicotinamide and
- nicotinylalanine and aspirin ASA
- ASA nicotinylalanine and aspirin
- this invention provides a means of maintaining elevated nicotinamide levels.
- ASA aspirin
- this invention provides a means of maintaining elevated nicotinamide levels.
- the addition of ASA (aspirin) at 20 and 100 mg/kg increases the NAL-dependent nicotinamide plasma levels in a dose-related manner (while also increasing plasma levels of NAL and NAL-X).
- nicotinylalanine and a glycine conjugation inhibitor are consistent with an inhibition of a compensatory down regulation of nicotinamide.
- nicotinamide becomes more complex due, in part, to
- interferon-gamma induces the rate-limiting enzyme (indoleamine 2,3-dioxygenase) in the kynurenine to induce the rate-limiting enzyme (indoleamine 2,3-dioxygenase) in the kynurenine to induce the rate-limiting enzyme (indoleamine 2,3-dioxygenase) in the kynurenine to induce the rate-limiting enzyme (indoleamine 2,3-dioxygenase) in the kynurenine to
- nicotinamide pathway in all cells and tissues except for the liver where interferon-gamma inhibits the liver's rate-limiting enzyme (tryptophan pyrollase) in the liver
- NAL nicotinylalanine
- acetylsalicylic acid will prevent or alter the course of murine retroviral-induced immunodeficiency disease, MAIDS, in C57BL/6 female mice.
- the LP-BM5 MuLV virus used for these studies was prepared from chronically infected SC-1 cells (ATCC Cat. No. CRL-1404), as described by Yetter R.A. et al., J. EXP. Med., 168, 623-635, 1988. Mice were inoculated intraperitoneally (i.p.) with a known pool of this virus (Pool 66) such that 0.1 ml of the pool injected i.p. results in 100% of inoculated mice
- the MAIDS model could be successfully adapted for use as in in vivo screening of antiviral drugs and biological response modifiers having antiviral properties.
- the MAIDS model has been used to define differential effectiveness of 3'azido-3'deoxythymidine (AZT) given in drinking water to mice over various time regimens in relation to virus inoculation (Eiseman J.L. et al., Antivir. Res., 16, 307-326, 1991).
- Severity of disease is scored as follows: 0.5, increased body weight and variably detected increase in size of any one lymph node or spleen; +1, clearly detectable increase in the size of a lymph node and spleen; +2, readily detectable (greater than 0.3 cm in diameter) increased size in more than one lymph node and, in particular, enlargement of subcervical, brachial or axillary nodes; +3, increased size of all palpable nodes and palpable splenomegaly (> 0.3 grams); +4, advanced disease with extensive splenomegaly (> 1.0 grams) and lymphadenopathy.
- mice Female C57BL/6 mice (5 weeks of age) were purchased from Charles River Breeding
- mice were allowed one week to acclimate to housing facilities prior to randomization for study. Animals were marked for identification and placed in microisolator cages with identifying cards (5 mice/cage), where autoclaved food and water were provided ad 3 ibitum.
- identifying cards 5 mice/cage
- ASA Sigma Chemical Co., Lot 33H1104
- NAL and ASA were formulated under sterile conditions according to preformulation methods outlined in
- NAL and ASA were dissolved in sterile phosphate-buffered normal saline solution (i.e., vehicle; Biofluids Inc., Lot 413054), adjusted to between pH 7.2 to 7.4 with 10N NaOH, sterilized by filtration through 0.2 ⁇ m bottle-type filters, and dispersed into sterile glass vials, sealed and capped (Wheaton Inc.).
- AZT (3'azido-3'deoxythymidine; Lot No. 809796) was a gift from Sandra Nusinoff-Lehman at Burroughs Wellcome Co. AZT was dissolved in sterile water to a concentration of 1.0 mg/ml and filtered through a 0.45 ⁇ m filter. The AZT-containing water was changed every Monday and Thursday and water consumption was recorded in order to calculate doses of AZT consumed throughout the study. The initial study had the following treatment groups (number of mice in each group):
- NAL NAL, i.p. 200 mg/kg (20)
- NAL NAL, i.p. 400 mg/kg (20)
- mice uninoculated control mice (10 mice).
- test drug injections began 1 day after virus infection and continued every day except weekends (i.e., 5 times per week).
- AZT was provided continuously in the drinking water.
- the AZT-treated mice had a sustained intake of a known, effective drug in this assay system.
- Hematocrits were routinely assessed at monthly intervals on all animals in order to monitor hematopoietic toxicity of AZT and to evaluate potential hematopoietic toxicity associated with test drug treatments alone or in combination with ASA or with AZT. Infection was quantified by ecotropic virus XC plaque assays of spleens removed from the interim
- the Kaplan-Meier curves also indicate that the 400 mg/kg NAL therapy delayed by two weeks (Group 6)
- Ecotropic virus titers were determined using the XC plaque assay (Yetter R.A. et al., J. EXP. Med., 168, 623- 635, 1988) and were performed on spleen cells cultured from all serially killed mice at the interim sacrifices as shown in Tables 2-A & 2-B). Spleens were weighed and cells were extruded with sterile media (RPMI 1640, with gentamycin and 10% fetal calf serum). Serial 10-fold dilutions were made and one ml of each dilution was overlayered onto a monolayer of SC-1 cells treated with 4 ⁇ g/ml polybrene. After 24 hours, the media was removed and washed and the SC-l cells were fed with fresh media. When the monolayer was confluent, the plates were
- virus plaques appeared to correlate with spleen weights as shown in Tables 2-A and 2-B.
- AZT is able to block de novo infection
- two of the mice treated with AZT for four months had detectable plaques indicating presence of replicating virus while none of three mice treated with AZT plus 400mg/kg NAL had
- nicotinylalanine in combination with ASA were evaluated using the MAIDS model of mice infected with LP-BM5 virus. Intraperitoneal nicotinylalanine was evaluated at doses of 200 and 400 mg/kg. The 400 mg/kg nicotinylalanine dose was selected to be combined with ASA at a dose of 20 mg/kg body weight. This combination could also be used in conjunction with AZT treatment. Nicotinylalanine (400 mg/kg, i.p.) was combined with AZT (1 mg/kg in drinking water) for the purpose of comparison to AZT (1 mg/kg in drinking water) alone and to evaluate efficacy and toxicity in this comparison.
- nicotinylalanine 400 mg/kg had no statistically significant effect (neither enhancing nor retarding) upon the antiviral or anti-disease properties of AZT in the mouse MAIDS model.
- chronic doses of AZT at 0.5 mg/kg in drinking water are also effective in controlling LP-BM5 disease and a lower dose of AZT at 0.1 mg/kg, while not as effective, still delayed disease progression (Eiseman J.L. et al.,
- mice As shown in Table 4, by one-month after LP-BM5 retrovirus inoculation, placebo-treated control mice (Group 1) have mean circulating levels of nicotinamide approximately 35% lower than uninfected controls. The reason for this deficiency is not because of dietary insufficiency, since these mice ingested adequate amounts of vitamin-supplemented chow (Purina Autoclavable Rodent Chow) containing niacin and niacinamide (nicotinamide), but is due to the fact that circulating LP-BM5 virus in mice induces production of murine interferon-gamma (mlFN- ⁇ ) as a normal host response to viral infection.
- vitamin-supplemented chow Purified chow
- mlFN- ⁇ murine interferon-gamma
- IDO indoleamine 2,3-dioxygenase
- monocyte lineage macroglia, microglia, Kupfer cells, etc.
- IFN- ⁇ down-regulates the enzyme tryptophan pyrollase in the liver (Takikawa O. et al., J. Biol. Chem. 263:2041-2048, 1988).
- Nicotinylalanine in combination with aspirin treatment according to this invention (Group 4, Table 4) also effectively prevents the precipitous fall in plasma nicotinamide levels observed in virus-positive controls. Although this latter effect of combination treatment could be due to some antiviral activity (see, e.g., Figure 4A) and thereby reducing circulating IFN- ⁇ levels, a more likely explanation would be related to the direct nicotinamide-enhancing metabolic effects of nicotinylalanine in combination with ASA.
- Nicotinamide-enhancing properties of all the experimental therapies which completed this study were associated with effects by four months of the study as reflected by nearly 2:1 ratios between plasma levels in the experimental groups as compared to plasma levels in the placebo-treated control (Table 4).
- the purpose of this study was to determine the plasma pharmacokinetics of nicotinylalanine in fasted, female C57BL/6 mice after intravenous (i.v.), intraperitoneal (i.p.), and oral (p.o.) administration of equivalent doses of nicotinylalanine at 400 mg/kg body weight.
- Bioavailability of nicotinylalanine after p.o. and i.p. administration was determined by comparison of the areas under the plasma time curves with the area under the plasma time curve for the i.v. administration of an equivalent dose at 400 mg/kg into the tail vein. Time points were evaluated from five minutes to 1,440 minutes (24 hours) after dosing, although the rapid
- NAL nicotinylalanine
- Example 1 two hours after an acute, i.p., 400 mg/kg dose of NAL, plasma levels of NAL were about twice as high as plasma levels of a major NAL metabolite
- NAL-X nicotinamide plasma levels were about twice those found in PBS-injected controls (Table 1).
- the plasma ratio of parent compound NAL to NAL-X metabolite is about 2:1 from two hours to at least four hours after dosing (Fig. 8). Further, following an oral dose of NAL,
- the kinetic data is relevant to optimizing dosage regimens of nicotinylalanine in combination with aspirin as a therapeutic agent.
- the fraction bioavailable (F) after an oral dose is approximately 100% and equivalent to intravenous administration.
- nicotinylalanine following an oral dose is approximately twice as long as after an i.p. dose and approximately one and a half (11 ⁇ 2) times as long as after i.v. administration (Table 5). Further, the volume of distribution (Vdss) is consistent with a compound well-distributed in aqueous compartments, especially in the oral dosage form.
- an optimum protocol would include both oral and i.p. administration since both the duration of action (t1 ⁇ 2) and bioavailability (F) would be maximized.
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EP96909681A EP0814812A1 (en) | 1995-03-14 | 1996-03-13 | Compositions comprising nicotynylalanine and an inhibitor of glycine conjugation or vitamin b6 |
MX9707046A MX9707046A (en) | 1995-03-14 | 1996-03-13 | Compositions comprising nicotynylalanine and an inhibitor of glycine conjugation or vitamin b6. |
US08/930,234 US5916906A (en) | 1995-03-14 | 1996-03-13 | Compositions comprising nicotinylalanine and an inhibitor of glycine conjugation or vitamin B6 |
CA002215319A CA2215319C (en) | 1995-03-14 | 1996-03-13 | Compositions comprising nicotinylalanine and an inhibitor of glycine conjugation or vitamin b6 |
AU53101/96A AU707084B2 (en) | 1995-03-14 | 1996-03-13 | Compositions comprising nicotynylalanine and an inhibitor of glycine conjugation or vitamin B6 |
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US20170112857A1 (en) * | 2015-10-27 | 2017-04-27 | New Haven Pharmaceuticals, Inc. | Extended Release Aspirin |
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WO1987001285A1 (en) * | 1985-08-27 | 1987-03-12 | David Henry Blass | Therapeutic composition |
WO1991017750A1 (en) * | 1990-05-24 | 1991-11-28 | Fidia S.P.A. | Nicotinylalanine as a therapeutic agent acting on the central nervous system |
JPH06237735A (en) * | 1993-02-15 | 1994-08-30 | Nitto Denko Corp | Food having hypoglycemic action |
-
1996
- 1996-03-13 WO PCT/US1996/003435 patent/WO1996028167A1/en not_active Application Discontinuation
- 1996-03-13 US US08/930,234 patent/US5916906A/en not_active Expired - Lifetime
- 1996-03-13 JP JP8527804A patent/JPH11501934A/en active Pending
- 1996-03-13 EP EP96909681A patent/EP0814812A1/en not_active Withdrawn
- 1996-03-13 MX MX9707046A patent/MX9707046A/en unknown
- 1996-03-13 AU AU53101/96A patent/AU707084B2/en not_active Ceased
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WO1987001285A1 (en) * | 1985-08-27 | 1987-03-12 | David Henry Blass | Therapeutic composition |
WO1991017750A1 (en) * | 1990-05-24 | 1991-11-28 | Fidia S.P.A. | Nicotinylalanine as a therapeutic agent acting on the central nervous system |
JPH06237735A (en) * | 1993-02-15 | 1994-08-30 | Nitto Denko Corp | Food having hypoglycemic action |
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DATABASE WPI Section Ch Week 9439, Derwent World Patents Index; Class B04, AN 94-312784, XP002008010 * |
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M. BANASIK ET AL.: "Inhibition of poly(ADP-ribose) synthetase by unsaturated fatty acids, vitamins and vitamin-like substances", FEBS LETTERS, vol. 263, no. 2, April 1990 (1990-04-01), pages 222 - 224, XP000574736 * |
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WO2003047571A2 (en) * | 2001-11-28 | 2003-06-12 | Metagen Pharmaceuticals Gmbh | Use of a kmo inhibitor for producing a pharmaceutical composition |
WO2003047571A3 (en) * | 2001-11-28 | 2003-10-02 | Metagen Pharmaceuticals Gmbh | Use of a kmo inhibitor for producing a pharmaceutical composition |
Also Published As
Publication number | Publication date |
---|---|
AU5310196A (en) | 1996-10-02 |
US5916906A (en) | 1999-06-29 |
AU707084B2 (en) | 1999-07-01 |
MX9707046A (en) | 1998-02-28 |
JPH11501934A (en) | 1999-02-16 |
EP0814812A1 (en) | 1998-01-07 |
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