3-HANA	3-hydroxyanthranilic acid
3-HAO	3-hydroxyanthranilate oxidase
3-HK	3-hydroxy-L-kynurenine
5-HIAA	5-hydroxyindoleacetic acid
5-HT	serotonin
5-HTP	5-hydroxytryptophan
5-HTT	serotonin transporter
AA	anthranilic acid
AADC	L-aromatic amino acid decarboxylase
AMPA	α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid
ATP	adenosine triphosphate
BBB	blood–brain barrier
BDNF	brain-derived neurotrophic factor
CFA	complete Freund’s adjuvant
CGRP	calcitonin gene-related peptide
CNS	central nervous system
CSD	cortical spreading depression
DRG	dorsal root ganglion
ERK	extracellular signal-regulated kinase
FHM	familial hemiplegic migraine
GABA	gamma-aminobutyric acid
GFAP	glial fibrillary acidic protein
GPR35	G-protein-coupled receptor 35
Iba1	ionized calcium-binding adapter molecule 1
IDO	indoleamine-2,3-dioxygenase
IL-1 β	interleukin-1
KAT	kynurenine aminotransferase
KMO	kynurenine-3-monooxygenase
KP	kynurenine pathway
KYNA	kynurenic acid
KYNU	kynureninase
L-KYN	L-kynurenine
MAO	monoamine oxidase
MAPK	mitogen-activated protein kinases
MCA	middle cerebral artery
mCPP	m-chlorophenylpiperazine
MMA	middle meningeal artery
MT1/2	melatonin receptors 1/2
NAD	nicotinamide adenine dinucleotide
NADP	nicotinamide adenine dinucleotide phosphate
NMDA	N-methyl-D-aspartate
NO	nitric oxide
NOS	nitric oxide synthases
NTG	nitroglycerin
PACAP	pituitary adenylate cyclase-activating polypeptide
PIC	picolinic acid
PPE	plasma protein extravasation
QUIN	quinolinic acid
SP	substance P
TDO	tryptophan-2,3-dioxygenase
TG	trigeminal ganglia
TMJ	temporomandibular joint
TNC	trigeminal nucleus caudalis
TPH	L-tryptophan-hydroxylase
TRP	tryptophan
TRPV1	transient receptor potential vanilloid 1
TS	trigeminal system
TSH	thyroid-stimulating hormone
VIP	vasoactive intestinal peptide
VMAT2	vesicular monoamine transporter isoform 2
XA	xanthurenic acid