HPA	Hypothalamic–pituitary–adrenal
CRH	Corticotrophin releasing factor
ACTH	Adrenocorticotrophic hormone
CNS	Central nervous system
CSF	Cerebrospinal fluid
GWAS	Genome-wide association studies
MHC	Major histocompatibility complex
CRP	C-reactive protein
IL	Interleukins
PANSS	Positive and Negative Syndrome Scale
TNF	Tumor necrosis factor
TGF	Transforming growth factor
IFN	Interferon
sIL-2R	Soluble IL-2-receptor
CDL5	Cluster of differentiation 5-like protein
CDL40	cluster of differentiation 40
NMDA	N-methyl-d-aspartate
NSAID	Nonsteroidal anti-inflammatory drugs
DST	Dexamethasone suppression test
CAR	Cortisol awakening response
SNPs	Single nucleotide polymorphisms
FKBP5	FK506 binding protein-5
CRHR1	Corticotrophin-releasing hormone receptor 1
GR	Glucocorticoid receptor
CRHBP	CRH binding protein
NC3R1	BclI polymorphism in glucocorticoid receptor gene 11
DHEA	dehydroepiandrosterone
DHEAS	DHEA sulphate
BMI	Body mass index
NGF	Nerve growth factor
BDNF	Brain-derived neurotrophic factor
NT-3	Neurotrophin-3
NT-4/5	Neurotrophin-4/5
p75NTR	Pan neurotrophin receptor
mRNA	messenger RNA
5-HTR2	Serotonergic receptor type 2
DRD2	Dopaminergic receptor type 2
NGFR	NGF receptor
DA	Dopamine
DR	Dopamine receptor i.e., DRD2-dopamine receptor type D2
PFC	Prefrontal cortex
TH	Tyrosine hydroxylase
DAT	Dopamine transporter
HVA	Homovanillic acid
COMT	Catechol-O-methyl transferase
LSD	Lysergic acid diethylamide
5-HT	Serotonin
5-HTT/SERT	Serotonin transporter
5-HTR	Serotonin receptor i.e., 5-HTR1A-serotonin receptor type 1A
MHPG	3-methoxy-4-hydroxyphenylglycol
NMDAR	N-methyl-d-aspartate receptor
mGluR	Metabotropic glutamate receptor i.e., mGluR3- Metabotropic glutamate receptor type 3
GABA	Gamma-amino-butyric acid
GAD	Glutamic acid decarboxylase
GABR	GABA-A receptor gene i.e., GABRB2-GABA-A receptor beta2 subunit gene