α7nAChR	α-7 nicotinic receptors acetylcholine
AHR	aryl hydrocarbon receptor
AMPAR	α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptor
ANS	autonomic nervous system
BBB	blood-brain barrier
CNS	central nervous system
CSF	cerebrospinal fluid
GABA	γ-aminobutyric acid
GPR35	G-protein-coupled receptor 35
3-HK	3-hydroxykynurenine
HPA	hypothalamic–pituitary–adrenal
IDO	indoleamine 2,3-dioxygenase
icv	intracerebroventricular
KAR	kainite receptor
KAT	kynurenine aminotransferase
KMO	kynurenine 3-monooxygenase
KP	kynurenine pathway
KYNA	kynurenic acid
KYN	kynurenine
LC	locus coeruleus
NE	norepinephrine
NMDAR	N-methyl-d-aspartate receptor
NTS	nucleus tractus solitarii
QUIN	quinolinic acid
PCP	phencyclidine
PVN	paraventricular nucleus
TDO	tryptophan 2,3-dioxygenase
TRP	tryptophan
VNS	vagal nerve stimulation