TY  - EJOU
AU  - TIAN, FEI 
AU  - LIU, GANG 
AU  - FAN, LINLIN 
AU  - CHEN, ZHONGYUN 
AU  - LIANG, YAN 
AU  - , 

TI  - miR-21-3p alleviates neuronal apoptosis during cerebral ischemiareperfusion injury by targeting SMAD2
T2  - BIOCELL

PY  - 2021
VL  - 45
IS  - 1
SN  - 1667-5746

AB  - Cerebral ischemia is due to the formation of blood clots or embolisms in the brain arteries, which leads to local
brain tissue necrosis and neural cell apoptosis. Recent studies have shown that microRNA (miRNA) plays an important
regulatory role in the pathological process of ischemic injury. The aim of this study is to investigate the role and the
mechanism of miR-21-3p and drosophila mothers against decapentaplegic 2 (SMAD2) in cerebral ischemic
reperfusion injured (CIRI) neural cells. The CIRI model was established by oxygen-glucose deprivation and recovery
process for N2a cells. The cell viability and the apoptotic was evaluated by MTT assay and the Flow Cytometer,
respectively. The expression of miR-21-3p and SMAD2 mRNA was detected by real-time fluorescence quantitative
PCR (qRT-PCR), and the expression of SMAD2 and apoptotic-related proteins were detected by Western Blotting.
Our results showed that miR-21-3p is down-regulated, and SMAD2 is up-regulated in CIRI. Overexpression of miR-
21-3p inhibits the apoptosis of neural cells in CIRI. miR-21-3p targets SMAD2 and inhibits SMAD2 expression. Overexpression of SMAD2 eliminates the protective effect of over-expression of miR-21-3p on neural cells in CIRI. Token
together, this study provides a theoretical basis for the mechanism of ischemic reperfusion injury in neural cells and a
new molecular target for ischemic stroke therapy.
KW  - Ischemic stroke
KW  -  Ischemic reperfusion injury
KW  -  Neural cells
KW  -  MicroRNA-21
KW  -  SMAD2
KW  -  Apoptosis

DO  - 10.32604/biocell.2021.013794