ATP	Adenosine triphosphate
AP	Area postrema
BBB	Blood–brain barrier
cAMP	Cyclic adenosine monophosphate
CCL2	C-C motif chemokine ligand 2
CD4	Cluster of differentiation 4
CD19	Cluster of differentiation 19
CD14	Cluster of differentiation 14
CD16	Cluster of differentiation 16
CD25	Cluster of differentiation 25
CD30	Cluster of differentiation 30
CD47	Cluster of differentiation 47
CD200	CD200 molecule
CNPase	2′,3′-cyclic-nucleotide 3′-phosphodiesterase
CMS	Chronic mild stress
CNS	Central nervous system
COX2	cycloocygenase-2
CP	Choroid plexus
CRP	C-reactive protein
CSF	Cerebrospinal fluid
CUMS	Chronic unpredictable mild stress
CX3CL1	C-X3-C motif chemokine ligand 1
CX3CR1	C-X3-C motif chemokine receptor 1
DAMP	Damage-associated molecular pattern
Foxp3	Forkhead box protein P3
GFAP	Glial fibrillary acidic protein
GR	Glucocorticoid receptor
HLA-DR	Human leukocyte antigen, DR isotypes
HMGB1	High mobility group box 1
HPA	Hypothalamic–pituitary–adrenal
hs-CRP	high-sensitivity C-reactive protein
HSP	Heat shock protein
IBA1	Ionized calcium-binding adapter molecule 1
IFN-α	Interferon alfa
IFN-γ	Interferon gamma
IL-1α	Interleukin-1α
IL-1β	Interleukin-1β
IL-1RA	Interleukin 1 receptor antagonist
IL-2	Interleukin-2
IL-4	Interleukin-4
IL-5	Interleukin-5
IL-6	Interleukin-6
IL-7	Interleukin-7
IL-8	Interleukin-8
IL-10	Interleukin-10
IL-12	Interleukin-12
IL-13	Interleukin-13
IL-17	Interleukin-17
IL-18	Interleukin-18
IL-21	Interleukin-21
IL-23	Interleukin-23
IL-33	Interleukin-33
IL-35	Interleukin-35
IP-10	Interferon-inducible protein 10
LPS	Lipopolysaccharide
MCP-1	Monocyte chemoattractant protein-1
MDD	Major depressive disorder
MIP-1β	macrophage inflammatory protein 1 beta
MRI	Magnetic resonance imaging
NF-κB	Nuclear factor kappa B
Olig2	Oligodendrocyte transcription factor 2
PET	Positron emission tomography
PNS	Parasympathetic nervous system
RNS	Reactive nitrogen species
ROS	Reactive oxygen species
RAGE	Receptor for advanced glycation end products
SCFA	Short-chain fatty acids
SFO	Subfornical organ
SNS	Sympathetic nervous system
SOCS1	Suppressor of cytokine signaling 1
SOCS2	Suppressor of cytokine signaling 2
SOCS3	Suppressor of cytokine signaling 3
SSRI	Selective serotonin reuptake inhibitor
Th1/Th2	T helper type 1 (Th1) and T helper type 2 (Th2)
Th17	T helper 17 cell
TLR	Toll-like receptor
TNF-α	Tumor necrosis factor-alpha
TSPO	Translocator protein
VOLT	Vascular organ of lamina terminalis