Home General Physiology and Biophysics 2021 General Physiology and Biophysics Vol.40, No.2, p.115–126, 2021

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Quarterly, 80 pp. per issue
Founded: 1982
ISSN  1338-4325 (online)

Published in English

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General Physiology and Biophysics Vol.40, No.2, p.115–126, 2021

Title: circ_0003170 aggravates human hippocampal neuron injuries by regulating the miR-421/CCL2 axis in cells models of epilepsy
Author: Fang Chen, Hongjia Zheng, Wenyu Zhang, Jie Kang, Qiao Liu, Juan Pu, Ling Yang

Abstract: Emerging evidence proposes that circular RNAs (circRNAs) are involved in epileptogenesis. This study aimed to investigate the role and the function mechanism of circ_0003170 in epilepsy models in vitro. Epilepsy models were established in human hippocampal neurons treated by magnesium-free (Mg2+-free) solution. The expression of circ_003170, miR-421 and C-C motif chemokine ligand 2 (CCL2) was detected by qRT-PCR. The putative interaction between miR-421 and circ_003170 or CCL2 was validated by dual-luciferase reporter assay and RIP assay. The protein level of CCL2 was detected by Western blot. Cell viability was detected by CCK-8 assay, and cell cycle and apoptosis were monitored by flow cytometry. The content of superoxide dismutase (SOD) and malondialdehyde (MDA) and the activity of caspase-3 were assessed using commercial kits. The results showed that circ_0003170 and CCL2 expression was enhanced, while miR-421 expression was declined in temporal lobe epilepsy serum specimens and Mg2+-free-induced neurons. circ_0003170 knockdown ameliorated Mg2+-free-induced cell cycle arrest, oxidative stress and apoptosis in neurons by enriching miR-421. Further analysis presented that miR-421 overexpression alleviated Mg2+-free-induced cell injuries by depleting CCL2. CCL2 overexpression reversed the effects of circ_0003170 knockdown. Overall, circ_0003170 knockdown ameliorated Mg2+-free-induced human hippocampal neuron injuries by mediating the miR-421/CCL2 axis.

Keywords: circ_0003170 — miR-421 — CCL2 — Epilepsy — Hippocampal neuron — Mg2+-free
Published online: 07-Apr-2021
Year: 2021, Volume: 40, Issue: 2 Page From: 115, Page To: 126

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