6-OHDA	6-hydroxydopamine
ARTN	artemin
BDNF	brain-derived neurotrophic factor
BMP	morphogenetic protein
CA	catecholamine
CB	carotid body
CH	chronic hypoxia
CIH	chronic intermittent hypoxia
CNTF	ciliary neurotrophic factor
DA	dopaminergic
DAMPs	damage-associated molecular patterns
ECE	endothelin-converting enzyme
EGF	epidermal growth factor
EIA	enzyme immunoassay
ERK	extracellular signal-regulated kinase
ET	endothelin
FGF	fibroblast growth factor
GDNF	glial cell line-derived neurotrophic factor
GFLs	GDNF family ligands
GFR	glycosyl-phosphatidylinositol-anchored coreceptor
gp130	glycoprotein 130
GPCRs	G-protein coupled receptors
HIF-1α	hypoxia inducible factor-1α
IGF	insulin-like growth factor
IH/ROX	intermittent hypoxia/reoxygenation
IHH	intermittent hypobaric hypoxia
IL	Interleukin
JAK/STAT	Janus kinase/signal transduction and activator of transcription
LIF	leukemia inhibitory factor
L-NAME	hydrochloride NG-nitro-methyl ester-L-arginine
LPA	lysophosphatidic acid
LPS	lipopolysaccharide
MCP-1	monocyte chemoattractant protein-1
MPTP	1-methyl-4-phenyl-1,2,3,6,-tetahydropyridine
NCAM	neural cell adhesion molecule
NCT	neonatal caffeine treatment
NGF	nerve growth factor
NMDA	N-methyl-D-aspartate
NOS	nitric oxide synthase
NRTN	neurturin
NSCs	neural stem cells
NT	neurotrophin
PD	Parkinson’s disease
PDGF	platelet-derived growth factor
PLA	proximity ligation assay
PSPN	persephin
RET	Ret tyrosine kinase receptor
RRI	receptor–receptor interactions
RTKs	receptor tyrosine kinases
SCG	superior cervical ganglion
SHR	spontaneously hypertensive rats
SVZ/OB	subventricular zone/olfactory bulb
TGF	transforming growth factor
TH	tyrosine hydroxylase
TNFα	tumor necrosis factor α
Trk	tyrosine receptor kinase
VEGF	vascular endothelial growth factor
VM	ventral mesencephalon