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• W2044381566 abstract "The toxicity caused by cell exposure to 1-methyl-4-phenylpyridinium ion (MPP+) is a useful model in the study of Parkinson's disease (PD). However, the exact molecular mechanisms triggered by MPP+ in cell death are currently unclear. In the present research, we show that exposure to MPP+ induce the cell death of neuroblastoma-derived dopaminergic B65 cells, which is not reversed by the widely known caspase inhibitor Z-VADfmk or by calpain inhibition. Likewise, when B65 cells were treated with MPP+, the DNA damage pathway that involves p53 was activated, and cells were arrested in the G2/M phase of the cell cycle. Interestingly, MPP+ has two effects on the expression of cell cycle-related proteins. It increases the content of cyclins A, E, cdk2 and the phosphorylated form of pRb (serine 780). However, MPP+ 5 mM decreased the expression of cyclin D1, B1 and cdk4. The decrease in the expression of cyclin B1 may be related to the arrest of cells observed in the G2/M phase of cell cycle. The increase in S phase cell cycle proteins and retinoblastoma protein phosphorylation was an unexpected result. As the antioxidant trolox attenuated the process of cell loss and changes in the cell cycle, as measured by flow cytometry, we concluded that oxidative stress was involved in the effects of MPP+ in this cell line. In summary, the present work characterizes the molecular changes involved in damage caused by MPP+ in B65 cells, and highlights the effects of MPP+ on molecules involved in the control of cell cycle progression." @default.
• W2044381566 created "2016-06-24" @default.
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• W2044381566 date "2010-05-01" @default.
• W2044381566 modified "2023-10-18" @default.
• W2044381566 title "Effects of MPP+ on the molecular pathways involved in cell cycle control in B65 neuroblastoma cells" @default.
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• W2044381566 doi "https://doi.org/10.1016/j.phrs.2010.01.003" @default.
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