| AA | anthranilic acid |
| ISSR | International Society for Serotonin Research |
| GABA | gamma-aminobutyric acid |
| SSRIs | selective serotonin reuptake inhibitors |
| AI | artificial intelligence |
| 5-HT | 5-hydroxytryptamine |
| L-Trp | L-tryptophan |
| KYNA | kynurenine (Kyn) pathway; quinolinic acid |
| TPH2 | tryptophan hydroxylase-2 |
| TDO | enzyme tryptophan 2,3-dioxygenase |
| IDO | enzyme indoleamine 2,3-dioxygenase |
| 3-HAA | 3-hydroxyanthranilic acid |
| GPR109A agonist | G-protein-coupled receptor 109A |
| cPLA2 | cytosolic phospholipase A2 |
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