首页> 外文期刊>CNS neuroscience & therapeutics. >MicroRNA‐124 Protects Neurons Against Apoptosis in Cerebral Ischemic Stroke
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MicroRNA‐124 Protects Neurons Against Apoptosis in Cerebral Ischemic Stroke

机译:MicroRNA-124保护神经元抵抗脑缺血性中风的凋亡。

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Summary Aims To explore the role and underlying mechanism of miR‐124 in stroke. Methods miR‐124 expression was determined by real‐time PCR. The effect of miR‐124 on infarct area was assessed in middle cerebral artery occlusion (MCAO) mice. The influence of miR‐124 on oxygen and glucose deprivation (OGD) induced neuron apoptosis and death was examined by immunofluorescence. The effect of miR‐124 on apoptosis‐related proteins was determined by Western blot. Results The level of miR‐124 is significantly increased in ischemic penumbra as compared with that in nonischemic area of MACO mice. Brain tissue of stroke‐prone spontaneously hypertensive rats (SHR‐SP) also showed higher level of miR‐124 as compared with that of spontaneously hypertensive rats (SHR). Consistently, OGD treatment obviously increased miR‐124 level in primary neurons. In vivo , miR‐124 overexpression significantly decreased, while miR‐124 knockdown significantly increased, the infarct area of MCAO mice. In vitro , gain or loss of miR‐124 function resulted in reduced or increased neuron apoptosis and death induced by OGD, and increased or reduced antiapoptosis protein, Bcl‐2 and Bcl‐xl, respectively. Conclusions miR‐124 plays a neurons‐protective role via apoptosis‐inhibiting pathway in ischemic stroke.
机译:摘要目的探讨miR-124在中风中的作用和潜在机制。方法miR-124表达通过实时PCR测定。在大脑中动脉闭塞(MCAO)小鼠中评估了miR-124对梗塞区域的影响。通过免疫荧光检测了miR-124对氧和葡萄糖剥夺(OGD)诱导的神经元凋亡和死亡的影响。通过蛋白质印迹法确定miR-124对凋亡相关蛋白的影响。结果与非缺血区域的MACO小鼠相比,缺血半影的miR‐124水平显着增加。易发性自发性高血压大鼠(SHR-SP)的脑组织也比自发性高血压大鼠(SHR)的miR-124水平更高。一致地,OGD治疗明显增加了原代神经元的miR-124水平。在体内,MCAO小鼠的梗塞面积显着降低了miR‐124的过表达,而miR‐124的敲低则显着增加。在体外,miR-124功能的获得或丧失导致OGD诱导的神经元凋亡减少或增加,抗凋亡蛋白Bcl-2和Bcl-xl分别增加或减少。结论miR-124通过细胞凋亡抑制途径在缺血性中风中发挥神经元保护作用。

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