例如:"lncRNA", "apoptosis", "WRKY"

miR-124/IRE-1α affects renal ischemia/reperfusion injury by regulating endoplasmic reticulum stress in renal tubular epithelial cells.

Acta Biochim Biophys Sin (Shanghai). 2020 Feb 03;52(2):160-167
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摘要


Acute kidney injury (AKI) refers to a clinical syndrome that occurs as a result of a rapid decline in renal function caused by multiple factors. Renal ischemia/reperfusion (I/R) injury is one of the main causes of AKI and has a high incidence and mortality. However, the specific pathogenesis of renal I/R injury is still unclear. In recent years, a major breakthrough has been made in the study of endoplasmic reticulum stress (ERS)-mediated apoptosis in I/R injury. It has been reported that miRNAs play protective roles in ischemic/reperfused organs, but the molecular mechanisms have not been investigated deeply. In this study, the renal I/R mouse model was used to explore the roles of miR-124 in ERS and in renal I/R injury. The western blot results showed that the expression levels of ERS-related proteins IRE-1α, XBP-1, and glucose-regulated protein 78 (GRP78) were significantly increased in the I/R model group when compared with those in the control group. Meanwhile, qPCR results showed that miR-124 expression was decreased in the I/R injury model, and overexpression of miR-124 using miR-124 mimics effectively reduced the expression of ERS-related proteins and alleviated renal I/R injury. In addition, luciferase reporter assay was performed, and the results showed that IRE-1α and miR-124 may have direct interaction. In conclusion, our data indicated that miR-124 was a negative regulator of ERS via binding to IRE-1α, ultimately conferring its protective effect on the kidney, which demonstrates the regulatory mechanism of miR-124 in renal I/R injury and provides new ideas and methods for the prevention and treatment of renal I/R injury.

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