Journal
ARCHIVES OF PHYSIOLOGY AND BIOCHEMISTRY
Volume 128, Issue 6, Pages 1603-1610Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/13813455.2020.1785506
Keywords
MicroRNA-20a; inflammation; apoptosis; diabetic kidney disease; CXCL8
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This study determined the expression pattern and biological roles of miR-20a in diabetic kidney disease (DKD). miR-20a over-expression enhanced cell proliferation, inhibited cell apoptosis, and suppressed the inflammatory response. Additionally, miR-20a may regulate HG-induced renal proximal tubular inflammatory injury through the regulation of CXCL8 expression and the MEK/ERK pathway.
In our study, we determined the pattern of expression and biological roles of microRNA-20a (miR-20a) in diabetic kidney disease (DKD). The difference in the expression of miR-20a and proinflammatory genes (TNF-alpha, IL-6, and IL-1 beta) was measured across control, normal glucose (NG), and high glucose (HG) groups. Co-transfection miR-20a mimic and CXCL8 silence was used to assess the miR-20a/CXCL8 axis in the HG-induced HK-2 cell injury involved in DKD. miR-20a in HG group was significantly decreased, and a marked augmentation of inflammatory factor gene expression (TNF-alpha, IL-6, and IL-1 beta) in HK-2 cells was induced by HG. miR-20a over-expression enhanced cell proliferation, inhibited cell apoptosis, and suppressed the inflammatory response of HK-2 cells. CXCL8 knockdown strengthened the role of miR-20a. Our findings showed that miR-20a might be a significant regulator of HG-induced renal proximal tubular inflammatory injury mediating diabetic kidney disease through regulation of the expression of CXCL8 and the MEK/ERK pathway.
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