3-hydroxykyn	3-hydroxykynurenine
5-hydroxyTrp	5-hydroxytryptophan
AroAT	aromatic amino acid aminotransferases
AADC	aromatic-L-amino acid decarboxylase
AhR	aryl hydrocarbon receptor
CD	Crohn’s disease
CRISPR	clustered regularly interspaced short palindromic repeats
Cas9	CRISPR-associated protein-9 nuclease
RT-PCR	real-time reverse transcription-polymerase chain reaction
ELISA	enzyme-linked immunosorbent assay
NF-κB	nuclear factor kappa-light-chain-enhancer of activated B cells
PAK1	p21-activated kinase 1
FAK	focal adhesion kinase
SDS-PAGE	sodium dodecyl sulfate polyacrylamide gel electrophoresis
HRP	horseradish peroxidase
EC	enterochromaffin cells
3-IAld	indole-3-aldehyde
IDO	indoleamine-2,3-dioxygenase
IBS	irritable bowel syndrome
KYNU	kynureninase
KA	kynurenic acid
Kyn	kynurenine
KAT	kynurenine aminotransferase
KP	kynurenine pathway
PL	pyridoxal
PM	pyridoxamine
PMP	pyridoxamine phosphate
PN	pyridoxine
PNG	pyridoxine glucoside
PNP	pyridoxine phosphate
TDO	tryptophan-2,3-dioxygenase
Tph	tryptophan hydroxylase
Trpase	tryptophan indole lyase
TS	tryptophan synthase
UC	ulcerative colitis
XA	xanthurenic acid