| MPTP | 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine |
| PD | Parkinson’s disease |
| CREB | cAMP-dependent response element-binding protein |
| MnRN | median raphe nucleus |
| SN | substantia nigra |
| SNpc | substantia nigra pars compacta |
| SNr | the reticular part of the substantia nigra |
| DG | dentate gyrus |
| FG | fluorogold |
| RT-qPCR | real-time quantitative polymerase chain reaction |
| PKA | protein kinase A |