Xanthurenic acid

Xanthurenic acid
Names
Preferred IUPAC name
4,8-Dihydroxyquinoline-2-carboxylic acid
Other names
Xanthuric acid
Xanthurenate
8-Hydroxykynurenic acid
4,8-Dihydroxyquinaldic acid
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.000.373
EC Number
  • 200-410-1
KEGG
UNII
  • InChI=1S/C10H7NO4/c12-7-3-1-2-5-8(13)4-6(10(14)15)11-9(5)7/h1-4,12H,(H,11,13)(H,14,15) N
    Key: FBZONXHGGPHHIY-UHFFFAOYSA-N N
  • InChI=1/C10H7NO4/c12-7-3-1-2-5-8(13)4-6(10(14)15)11-9(5)7/h1-4,12H,(H,11,13)(H,14,15)
    Key: FBZONXHGGPHHIY-UHFFFAOYAE
  • OC2=CC(C(O)=O)=NC1=C(O)C=CC=C12
Properties
C10H7NO4
Molar mass 205.169 g·mol−1
Appearance Yellow crystals
Melting point 286 °C (547 °F; 559 K)
Insoluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Xanthurenic acid, or xanthurenate, is a metabolic intermediate that accumulates and is excreted by pyridoxine (vitamin B6) deficient animals after the ingestion of tryptophan.

Xanthurenic acid is suspected to be an endogenous agonist for Group II metabotropic glutamate receptors in humans. It is also known to be a potent VGLUT inhibitor, thereby preventing the movement of glutamate from the cytoplasm into synaptic vesicles, an action that it mediates via competitive blockade of vesicular glutamate transporters (Ki = 0.19 mM).

In 2015 researchers reported a marked reduction of xanthurenic acid levels in the serum of patients with schizophrenia. A recent meta-analysis showed that blood xanthurenic acid levels are lower in individuals suffering from bipolar disorder as well.

Xanthurenic acid has also been shown to induce gametogenesis of Plasmodium falciparum, the parasite that causes malaria. It is found in the gut of the Anopheles mosquito.

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