miR-30e-5p Regulates Autophagy and Apoptosis by Targeting Beclin1 Involved in Contrast-induced Acute Kidney Injury

Title:miR-30e-5p Regulates Autophagy and Apoptosis by Targeting Beclin1 Involved in Contrast-induced Acute Kidney Injury

Volume: 28 Issue: 38

Author(s): Xiaoqin Liu, Qingzhao Li , Lixin Sun, Limei Chen, Yue Li, Beibei Huang, Yunshuang Liu*Chunyang Jiang *

Affiliation:

• Department of Ultrasonic Medicine, Hongqi Hospital, Mudanjiang Medical University, 5 Tongxiang Road, Aimin District, Mudanjiang 157011, Heilongjiang,China

• Department of Thoracic Surgery, Tianjin Union Medical Center, Nankai University, 190 Jieyuan Road, Hongqiao District, Tianjin 300121, Tianjin,China

Keywords: Acute kidney injury, contrast, miR-30e-5p, autophagy, apoptosis, HK-2 cells.

Abstract:

Aims: This study aims to verify if miR-30e-5p targets Beclin1 (BECN1), a key regulator of autophagy, and investigate the function of miR-30e-5p and Beclin1 through mediating autophagy and apoptosis in contrast-induced acute kidney injury (CIAKI).

Methods: Human renal tubular epithelial HK-2 cells were treated with Urografin to construct a cell model of CI-AKI. Real-time reverse transcription-polymerase chain reaction was used to detect gene expression. The dual-luciferase reporting assay and endogenous validation were used to verify targeting and regulating function. The expressions of protein were detected using Western blot. Cell proliferation was detected using methylthiazolyldiphenyl- tetrazolium bromide (MTT) assay. Cell apoptosis was detected using terminal- deoxynucleoitidyl transferase mediated nick end labeling assay, and autophagy was detected using transmission electron microscopy.

Results: HK-2 cells exposed to Urografin for 2 h induced a significant increase in miR-30e-5p. miR-30e-5p had a targeting effect on Beclin1. Moreover, Urografin exposure can enhance cell apoptosis by increasing caspase 3 gene expression and inhibiting autophagy, which was induced by decreased Beclin1 expression regulated by miR-30e-5p, thereby resulting in renal cell injury. Downregulation of miR-30e-5p or upregulation of Beclin1 restored cell vitality by promoting autophagy and suppressing apoptosis in Urografin-treated cells.

Conclusion : Urografin increased the expression of miR-30e-5p in HK-2 cells and thus decreased Beclin1 levels to inhibit autophagy, but induced apoptosis, which may be the mechanism for CI-AKI.

Cite this article as:

Liu Xiaoqin , Li Qingzhao , Sun Lixin , Chen Limei , Li Yue , Huang Beibei , Liu Yunshuang *, Jiang Chunyang*, miR-30e-5p Regulates Autophagy and Apoptosis by Targeting Beclin1 Involved in Contrast-induced Acute Kidney Injury, Current Medicinal Chemistry 2021; 28 (38) . https://dx.doi.org/10.2174/0929867328666210526125023