MPP+	1-methyl-4-phenylpyridinium
GBA	gut-brain-axis
PD	Parkinson’s disease
LAB	lactic acid bacteria
BDNF	brain-derived neurotropic factor
GABA	γ-aminobutyric acid
CM	conditioned medium
ROS	reactive oxygen species
TrkB	tyrosine kinase B
DPPH	2,2-diphenyl-1-picrylhydrazyl
ABTS	2,2′-azinobis (2-ethylbenzothiazoline-6-sulfonate)
MTT	3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
Bax	Bcl-2-associated X protein
Bcl-2	B-cell lymphoma
GAPDH	glyceraldehyde-3-phosphate dehydrogenase