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Studies on the metabolism of kynurenic acid Enzymic formation of 7,8-ｄihydroxykynurenic acid from kynurenic acidopenaire
The Janus-face kynurenic acid [PDF]
Journal of Neural Transmission, 2008 Kynurenic acid is an endogenous product of the tryptophan metabolism. Studies on the mechanism of its action have revealed that kynurenic acid at high concentrations is a competitive antagonist of the N-methyl-D-aspartate receptor and acts as a neuroprotectant in different neurological disorders.
Hermína Robotka +2 more
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Comparative study on the effects of kynurenic acid and glucosamine–kynurenic acid [PDF]
Pharmacology Biochemistry and Behavior, 2004 Kynurenic acid (KYNA) is the only known endogenous N-methyl-D-aspartate (NMDA) receptor inhibitor and might therefore come into consideration as a therapeutic agent in certain neurobiological disorders. However, its use as a neuroprotective compound is practically excluded because KYNA does not readily cross the blood-brain barrier (BBB).
Füvesi, Judit +11 more
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A novel kynurenic acid analogue: a comparison with kynurenic acid. An in vitro electrophysiological study [PDF]
Journal of Neural Transmission, 2009 Kynurenic acid is an endogenous product of the tryptophan metabolism, and as a broad-spectrum antagonist of excitatory amino acid receptors may serve as a protective agent in neurological disorders. The use of kynurenic acid as a neuroprotective agent is rather limited, however, because it has only restricted ability to cross the blood-brain barrier ...
Mate Marosi +2 more
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Modifications on the carboxylic function of kynurenic acid [PDF]
Journal of Neural Transmission, 2011 Pharmacological and histological studies of ten new amides of kynurenic acid revealed that N-(2-N,N-dimethylaminoethyl)-4-oxo-1H-quinoline-2-carboxamide hydrochloride has effective neuroprotective properties. Namely, this molecule is: (1) proved to be an effective inhibitor of excitatory synaptic transmission in the CA1 region of the hippocampus both ...
Fülöp Ferenc +3 more
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The kynurenic acid hypothesis of schizophrenia
Physiology & Behavior, 2007In recent years progress in the field of schizophrenia research has led to the suggestion that dopamine only plays an intermediary role in the pathophysiology of the disease and that the main abnormalities lie elsewhere. In particular, deficits in brain glutamatergic systems are suggested to play a prominent role in the pathophysiology of the disease ...
Sophie, Erhardt +4 more
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Kynurenic Acid And Schizophrenia
2003In recent years the "dopamine (DA) hypothesis of schizophrenia", has been modified into a more diversified view where an attenuated glutamatergic neurotransmission is believed to participate in the pathogenesis of the disease. Thus, schizophrenia may be regarded as a glutamate deficiency disorder.
Sophie, Erhardt +2 more
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Presence of Kynurenic Acid in the Mammalian Brain
Journal of Neurochemistry, 1988AbstractKynurenic acid, a tryptophan metabolite able to antagonize the actions of the excitatory amino acids, has been identified and measured for the first time in the brain of mice, rats, guinea pigs, and humans by using an HPLC method. Its content was 5.8 ± 0.9 in mouse brain, 17.8 ± 2.0 in rat brain, 16.2 ± 1.5 in guinea pig brain, 26.8 ± 2.9 in ...
Flavio Moroni, P Russi, G Lombardi
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Acta Crystallographica Section C Crystal Structure Communications, 1996
In the structure of the title compound, 4-hydroxy-2- quinolinecarboxylic acid monohydrate, C 10 H 7 NO 3 .H 2 O, the carboxyl group is ionized and the ring N atom is protonated giving it a positive charge. The molecule is almost planar. The crystal structure is stabilized both by intermolecular O-H...O and N-H...O hydrogen bonds involving the solvated ...
N. Okabe, J. Miura, A. Shimosaki
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In the structure of the title compound, 4-hydroxy-2- quinolinecarboxylic acid monohydrate, C 10 H 7 NO 3 .H 2 O, the carboxyl group is ionized and the ring N atom is protonated giving it a positive charge. The molecule is almost planar. The crystal structure is stabilized both by intermolecular O-H...O and N-H...O hydrogen bonds involving the solvated ...
N. Okabe, J. Miura, A. Shimosaki
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Kynurenic acid synthesis by human glioma
Journal of the Neurological Sciences, 1990Biopsy material from human gliomas obtained during neurosurgery was used to investigate whether pathological human brain tissue is capable of producing kynurenic acid (KYNA), a natural brain metabolite which can act as an antagonist at excitatory amino acid receptors.
Vezzani, A +5 more
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