MicroRNA-302c modulates peritoneal dialysis-associated fibrosis by targeting connective tissue growth factor

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Abstract

Long-term peritoneal dialysis (PD) can lead to the induction of mesothelial/epithelial-mesenchymal transition (MMT/EMT) and fibrosis; these effects eventually result in ultrafiltration failure and the discontinuation of PD. MicroRNA-302c (miR-302c) is believed to be involved in regulating tumour cell growth and metastasis by suppressing MMT, but the effect of miR-302c on MMT in the context of PD is unknown. MiR-302c levels were measured in mesothelial cells isolated from the PD effluents of continuous ambulatory peritoneal dialysis patients. After miR-302c overexpression using lentivirus, human peritoneal mesothelial cell line (HMrSV5) and PD mouse peritoneum were treated with TGF-β1 or high glucose peritoneal dialysate respectively. MiR-302c expression level and MMT-related factors alteration were observed. In addition, fibrosis of PD mouse peritoneum was alleviated by miR-302c overexpression. Furthermore, the expression of connective tissue growth factor (CTGF) was negatively related by miR-302c, and LV-miR-302c reversed the up-regulation of CTGF induced by TGF-β1. These data suggest that there is a novel TGF-β1/miR-302c/CTGF pathway that plays a significant role in the process of MMT and fibrosis during PD. MiR-302c might be a potential biomarker for peritoneal fibrosis and a novel therapeutic target for protection against peritoneal fibrosis in PD patients.

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Li, X., Liu, H., Sun, L., Zhou, X., Yuan, X., Chen, Y., … Xiao, L. (2019). MicroRNA-302c modulates peritoneal dialysis-associated fibrosis by targeting connective tissue growth factor. Journal of Cellular and Molecular Medicine, 23(4), 2372–2383. https://doi.org/10.1111/jcmm.14029

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