PMID- 33215437 OWN - NLM STAT- MEDLINE DCOM- 20210628 LR - 20210628 IS - 2284-0729 (Electronic) IS - 1128-3602 (Linking) VI - 24 IP - 21 DP - 2020 Nov TI - MiR-133b inhibits MPP+-induced apoptosis in Parkinson's disease model by inhibiting the ERK1/2 signaling pathway. PG - 11192-11198 LID - 23607 [pii] LID - 10.26355/eurrev_202011_23607 [doi] AB - OBJECTIVE: The aim of this study was to explore the effect of micro ribonucleic acid (miR)-133b on 1-methyl-4-phenylpyridinium ion (MPP+)-induced apoptosis in the Parkinson's disease (PD) model. MATERIALS AND METHODS: PC12 cells were induced by different concentrations of MPP+ to establish the PD cell model. Subsequently, the survival rate of PC12 cells was detected using Cell Counting Kit-8 (CCK-8) assay. Quantitative Reverse Transcription-Polymerase Chain Reaction (qRT-PCR) was used to detect the expression of miR-133b in the PD model induced by different concentrations of MPP+. Next, PC12 cells were transfected with miR-133b mimic and miR-negative control (NC), and divided into MPP+ group, MPP+ + miR-NC group and MPP+ + miR-133b mimic group. Transfection efficiency was verified using qRT-PCR. The apoptosis of cells was detected using terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay. Moreover, the expressions of extracellular signal-regulated kinase 1/2 (ERK1/2) and phosphorylated (p)-ERK1/2 were determined using Western blotting. RESULTS: After MPP+ treatment, the survival rate of PC12 cells significantly declined (p<0.05). MPP+ exhibited toxicity against PC12 cells in a concentration-dependent manner. Meanwhile, cell survival rate decreased remarkably with the increase of MPP+ concentration (p<0.05). With increased concentration of MPP+, the expression of miR-133b in the PD cell model declined significantly (p<0.05). The apoptosis of PC12 cells was remarkably inhibited by overexpression of miR-133b in the PD cell model (p<0.05). In addition, the protein expression of p-ERK1/2 in PC12 cells was notably reduced after overexpression of miR-133b in the PD cell model (p<0.05). CONCLUSIONS: MiR-133b is lowly expressed in the PD cell model. Furthermore, overexpression of miR-133b inhibits cell apoptosis in the PD cell model by regulating the ERK1/2 signaling pathway. FAU - Dong, L-G AU - Dong LG AD - Department of Neurology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, China. cuiguiyun-js@163.com. FAU - Lu, F-F AU - Lu FF FAU - Zu, J AU - Zu J FAU - Zhang, W AU - Zhang W FAU - Xu, C-Y AU - Xu CY FAU - Jin, G-L AU - Jin GL FAU - Yang, X-X AU - Yang XX FAU - Xiao, Q-H AU - Xiao QH FAU - Cui, C-C AU - Cui CC FAU - Xu, R AU - Xu R FAU - Zhou, S AU - Zhou S FAU - Zhu, J-N AU - Zhu JN FAU - Shen, T AU - Shen T FAU - Cui, G-Y AU - Cui GY LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Italy TA - Eur Rev Med Pharmacol Sci JT - European review for medical and pharmacological sciences JID - 9717360 RN - 0 (MIRN133 microRNA, rat) RN - 0 (MicroRNAs) RN - EC 2.7.11.24 (Mapk1 protein, rat) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) RN - R865A5OY8J (1-Methyl-4-phenylpyridinium) SB - IM MH - 1-Methyl-4-phenylpyridinium/antagonists & inhibitors/pharmacology MH - Animals MH - Apoptosis/drug effects MH - Cell Proliferation/drug effects MH - Cells, Cultured MH - *Disease Models, Animal MH - MicroRNAs/*metabolism MH - Mitogen-Activated Protein Kinase 1/genetics/*metabolism MH - Mitogen-Activated Protein Kinase 3/genetics/*metabolism MH - PC12 Cells MH - Parkinson Disease/*drug therapy/metabolism/pathology MH - Rats MH - Signal Transduction/drug effects EDAT- 2020/11/21 06:00 MHDA- 2021/06/29 06:00 CRDT- 2020/11/20 05:52 PHST- 2020/11/20 05:52 [entrez] PHST- 2020/11/21 06:00 [pubmed] PHST- 2021/06/29 06:00 [medline] AID - 23607 [pii] AID - 10.26355/eurrev_202011_23607 [doi] PST - ppublish SO - Eur Rev Med Pharmacol Sci. 2020 Nov;24(21):11192-11198. doi: 10.26355/eurrev_202011_23607.