Neuroprotective effects of fermented tea in MPTP-induced Parkinson's disease mouse model via MAPK signaling-mediated regulation of inflammation and antioxidant activity

•Semi-fermented tea exerts anti-inflammatory, anti-apoptotic, and anti-oxidant activity.•Semi-fermented tea showed the highest the level of theanine and GABA composition.•Semi-fermented tea alleviated MPTP-induced behavioral impairment and dopaminergic neuronal damage and reduced α-synuclein levels.