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MiR-101a-3p Attenuated Pilocarpine-Induced Epilepsy by Downregulating c-FOS

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Abstract

This study aimed to explore the effects and function of microRNA-101a-3p (miR-101a-3p) in epilepsy. Rat model of pilocarpine-induced epilepsy was established and the seizure frequency was recorded. Expression of miR-101a-3p and c-Fos in hippocampus tissues of Rat models were detected by qRT-PCR and western blot. Besides, we established a hippocampal neuronal culture model of acquired epilepsy using Mg2+ free medium to evaluate the effects of miR-101a-3p and c-Fos in vitro. Cells were transfected with miR-101a-3p mimic, si-c-FOS, miR-101a-3p + c-FOS and its corresponding controls. MTT assay was used to detect cell viability upon transfection. Flow cytometry was performed to determine the apoptosis rate. Western blot was performed to measure the protein expression of apoptosis-related proteins (Bcl-2, Bax, and cleaved caspase 3), autophagy-related proteins (LC3 and Beclin1) and c-FOS. The targeting relationship between miR-101a-3p and c-FOS was predicted and verified by TargetScan software and dual-luciferase reporter assay. The role of miR-101a-3p was validated using epilepsy rat models in vivo. Another Rat models of pilocarpine-induced epilepsy with miR-NC or miR-101a-3p injection were established to evaluate the effect of miR-101a-3p overexpression on epilepsy in vivo. MiR-101a-3p was downregulated while c-FOS was increased in hippocampus tissues of Rat model of pilocarpine-induced epilepsy. Overexpression of miR-101a-3p or c-FOS depletion promoted cell viability, inhibited cell apoptosis and autophagy. C-FOS was a target of miR-101a-3p and miR-101a-3p negatively regulated c-FOS expression to function in epilepsy. Overexpression of miR-101a-3p attenuated pilocarpine-induced epilepsy in Rats in vivo. This study indicated that miR-101a-3p could attenuate pilocarpine-induced epilepsy by repressing c-Fos expression.

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  1. Jiefeng Geng and Haibiao Zhao have contributed equally to this paper.

Authors and Affiliations

  1. Department of Neurology, The First Affiliated Hospital of Zhengzhou University, No. 1, East Jianshe Rd, Zhengzhou, 450052, Henan, China

    Jiefeng Geng, Haibiao Zhao, Junjie Geng, Yuyuan Gao & Bingzheng He

  2. Department of Anesthesiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China

    Xing Liu

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  1. Jiefeng Geng
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Correspondence to Jiefeng Geng.

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Geng, J., Zhao, H., Liu, X. et al. MiR-101a-3p Attenuated Pilocarpine-Induced Epilepsy by Downregulating c-FOS. Neurochem Res 46, 1119–1128 (2021). https://doi.org/10.1007/s11064-021-03245-w

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