MicroRNA-101a-3p mimic ameliorates spinal cord ischemia/reperfusion injury  

作　　者：Zai-Li Zhang Dan Wang Feng-Shou Chen 

机构地区：[1]Department of Anesthesiology,the First Hospital of China Medical University,Shenyang,Liaoning Province,China

出　　处：《Neural Regeneration Research》2022年第9期2022-2028,共7页中国神经再生研究（英文版）

摘　　要：miR-101a-3p is expressed in a variety of organs and tissues and plays a regulatory role in many diseases,but its role in spinal cord ischemia/reperfusion injury remains unclear.In this study,we established a rat model of spinal cord ischemia/reperfusion injury by clamping the aortic arch for 14 minutes followed by reperfusion for 24 hours.Results showed that miR-101a-3p expression in L4-L6 spinal cord was greatly decreased,whereas MYCN expression was greatly increased.Dual-luciferase reporter assay results showed that miR-101a-3p targeted MYCN.MYCN immunoreactivity,which was primarily colocalized with neurons in L4-L6 spinal tissue,greatly increased after spinal cord ischemia/reperfusion injury.However,intrathecal injection of an miR-101a-3p mimic within 24 hours before injury decreased MYCN,p53,caspase-9 and interleukin-1βexpression,reduced p53 immunoreactivity,reduced the number of MYCN/NeuN-positive cells and the number of necrotic cells in L4-L6 spinal tissue,and increased Tarlov scores.These findings suggest that the miR-101a-3p mimic improved spinal ischemia/reperfusion injury-induced nerve cell apoptosis and inflammation by inhibiting MYCN and the p53 signaling pathway.Therefore,miR-101a-3p mimic therapy may be a potential treatment option for spinal ischemia/reperfusion injury.

关 键 词：apoptosis CASPASE-9 INFLAMMATION INTERLEUKIN-1Β microRNA-101a-3p MYCN nerve cells p53 spinal cord ischemia/reperfusion injury 

分 类 号：R651.2[医药卫生—外科学]