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miR-186-5p Promotes Apoptosis by Targeting IGF-1 in SH-SY5Y OGD/R Model.
In recent years, accumulating evidence has revealed that microRNAs play critical roles in ischemia stroke. This study was designed to investigate the expression level and effects of microRNA (miR)-186-5p on ischemia stroke, and its underlying molecular mechanism. Firstly, we demonstrated that miR-186-5p were significantly up-regulated and induced apoptosis in oxygen and glucose deprivation/reperfusion (OGD/R) model. Moreover, we found that miR-186-5p reduced the expression of insulin-like growth factor (IGF)-1, an essential factor for the development of the nervous system. Meanwhile, miR-186-5p inhibitor enhanced cell viability and IGF-1 expression. Furthermore, IGF-1 was confirmed as a direct target gene of miR-186-5p by luciferase activity assay. In addition, miR-186-5p was upregulated in ischemia stroke patients' serum compared with healthy donors. These data demonstrated that miR-186-5p was an adverse factor by inducing neuron apoptosis and suppressing IGF-1 in ischemia stroke model, and suggested that miR-186-5p may be a diagnostic marker and potential therapeutic target for ischemia stroke patients.
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