kynurenine

L-Kynurenine ((S)-Kynurenine) is a key intermediate in the breakdown pathway of tryptophan. L-Kynurenine is a substrate of kynureninase, KMO, and KAT associated with the suppression of antitumor immune responses. It has been shown to inhibit allogeneic T-cell proliferation and to increase malignant U87 glioma cell invasion into a collagen matrix.

D-Kynurenine (ZINC901103) is a metabolite of D-tryptophan and an agonist of GPR109B. D-Kynurenine activates AhR and promotes the conversion of the epithelium to mesenchyme. D-Kynurenine serves as a substrate in the fluorescence analysis of D-amino acid oxidase.

2-Amino-4-(2-aminophenyl)-4-oxobutanoic acid (3-Anthraniloylalanine) is a ketone and amino acid derivative with diverse biological functions, including vasodilatory, immunoregulatory, and neuromodulatory activities. It is a precursor for niacin and its aberrant production is linked to neurological disease-related cognitive deficits and depressive symptoms. This compound is overexpressed in certain cancer cell types and could potentially serve as a biomarker to assess cancer risk.

Quinolinic acid (QUIN) is an endogenous N-methyl-D-aspartate (NMDA) receptor agonist synthesized from L-tryptophan via the kynurenine pathway.

3-Hydroxyanthranilic acid is a tryptophan metabolite in the kynurenine pathway. It has been found in human epidermis and bladder tissue and has been detected in a variety of biological fluids such as urine and blood. Within cells, it is primarily located in the cytoplasm. It is present in all eukaryotes from yeast to humans. 3-Hydroxyanthranilic acid has antioxidant activity.

Cannflavin A, isolated from Cannabis sativa L., exhibits anti-cancer, neuroprotective, and anti-inflammatory activities by inhibiting Aβ1-42 aggregation and kynurenine-3-monooxygenase (KMO), as well as inducing apoptosis through caspase-3 cleavage [1] [2] [3] [4].