Kynurenic acid antagonists and kynurenine pathway inhibitors
Abstract
The kynurenine pathway accounts for the metabolism of around 80% of non-protein tryptophan metabolism. It includes both an agonist (quinolinic acid) at NMDA receptors and an antagonist (kynurenic acid). Since their discovery, there has been a major development of kynurenic acid analogues as neuroprotectants for the treatment of stroke and neurodegenerative disease. Several prodrugs of kynurenic acid or its analogues that can be hydrolysed within the CNS are also available. More recently, the pathway itself has proved to be a valuable drug target, affected by agents which reduce the synthesis of quinolinic acid and increase the formation of kynurenic acid. The change in the balance of these, away from the excitotoxin and towards the neuroprotectant, has anticonvulsant and neuroprotective properties.
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Kynurenic acid is usually neuroprotective as an NMDA receptor antagonist, whereas quinolinic acid acts as an NMDA receptor agonist and exerts neurotoxic effects.
“As an antagonist to the N-methyl-d-aspartate (NMDA) receptor, kynurenic acid is usually neuroprotective, whereas quinolinic acid acts as an agonist to the NMDA receptor and exerts neurotoxic effects (393).”
From Diet and the Microbiota–Gut–Brain Axis: Sowing the Seeds of Good Mental Health (2021) · cites this paper as [393]
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Tavares, R. G., Schmidt, A. P., Abud, J., Tasca, C. I., & Souza, D. O. (2005) · Neurochemical Research · doi:10.1007/s11064-005-2678-0 · Cited by 59 · see citing works
- Authors
- Stone, T. W.
- Affiliations
- University of Glasgow (GB)
- Corresponding author
- Stone, Trevor W
- ORCID
- Stone, Trevor W
- Venue
- Expert Opinion on Investigational Drugs
- Publisher
- Informa UK Limited
- Published
- 2001-04
- Volume
- 10
- Issue
- 4
- Pages
- 633-645
- ISSN
- 1354-3784 (ISSN-L)
- 1744-7658
- OpenAlex
- W2106566895
- Cited by
- 79
- References
- 111
- Citations by year
- 2026: 4 · 2025: 5 · 2024: 6 · 2023: 3 · 2022: 4 · 2021: 1 · 2020: 4 · 2019: 3 · 2018: 2 · 2017: 2 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 1 · 2012: 5
- FWCI
- 0.31
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Expert Opinion on Investigational Drugs (publishedVersion)
- PubMed (publishedVersion)
- ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
- Topics
- Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Keywords
- kynurenic acid, kynurenine pathway, tryptophan metabolism, quinolinic acid, NMDA receptor antagonists, prodrugs, neuroprotection, stroke, neurodegenerative diseases, antiepileptic drugs, excitotoxicity
- MeSH terms
- Brain Ischemia, Epilepsy, Humans, Kynurenic Acid, Kynurenine, Parkinson Disease, Prodrugs, Schizophrenia, Quinolinic Acid, Excitatory Amino Acid Antagonists, Neuroprotective Agents
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