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Parkinson's disease (PD) is a progressive and incurable neurodegenerative disorder. In this study, we utilized SHSY5Y cells an in vitro PD model to study the biological function of microRNA-505 (miR-505) in 1-methyl-4-phenylpyridinium (MPP+)-induced cytotoxicity. SHSY5Y cells were treated with MPP+ to induce PD-associated cell death and cytotoxicity. MiR-505 was found to be upregulated by MPP+ . Lentiviral...