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Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Med+Sci+Monit 2018 ; 24 (ä): 1724-32 Nephropedia Template TP
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?-Arrestin 1/2 Aggravates Podocyte Apoptosis of Diabetic Nephropathy via Wnt/?-Catenin Pathway #MMPMID29572435
Wang Y; Li H; Song SP
Med Sci Monit 2018[]; 24 (ä): 1724-32 PMID29572435show ga
Background: ?-arrestins have been shown to play a critical role in the progression of diabetic nephropathy. Nevertheless, the potential mechanism of ?-arrestins on the regulation of podocyte apoptosis has rarely been discussed. This study aimed to elucidate the regulation of ?-arrestin 1/2 on podocyte apoptosis through the Wnt/?-catenin pathway. Material/Methods: This study structured ?-arrestin 1/2 down-regulated and up-regulated expression by plasmid transfection. The protein levels were detected with Western blotting, and mRNA expression was detected with RT-qPCR. The apoptotic cells were measured by flow cytometry. Results: ?-arrestin 1/2 expression levels of podocytes were up-regulated in high-glucose-induced podocytes. ?-arrestin 1/2 overexpression inhibited the expression of nephrin and podocin protein. Up-regulated ?-arrestin 1/2 promoted podocyte apoptosis and p53 pathway by increasing Bax, cleaved caspase-3, and p-p53 levels in high-glucose-induced podocytes. Flow cytometry showed that the apoptotic cells were markedly higher in the ?-arrestin 1/2 up-regulated group compared with the scramble group. Expression of ?-catenin was increased in the ?-arrestin 1/2 up-regulated group, which indicated that the Wnt/?-catenin pathway was activated. Wnt/?-catenin pathway inhibitor (Dkk1) distinctly suppressed the apoptosis induced by ?-arrestin 1/2 overexpression and high glucose. Conclusions: These results provide a molecular pathomechanism of ?-arrestin 1/2 and Wnt/?-catenin pathway on podocyte apoptosis and provide new ideas for the treatment of diabetic nephropathy, which paves the way for the future study of diabetic nephropathy and podocytes.