ABSTRACT
Aim To study the role of marein mediated AMPK signaling pathway in delaying oxidative stress, inflammation and fibrotic protein expression in diabetic nephropathy ( DN ). Methods In vitro diabetic nephropathy model was established by HG + PA induced rat mesangial cells ( HBZY-1 ) , and the cultured HBZY-1 cells were divided into normal control group (NG), HG + PA( GlucoselOO mmol • L'1 + Palmitic acid 250 [imo\ • L'1, HG +PA) model group, HG + PA + marein with different doses of 25 p,mol • L"1, 50 p,mol • L"1, 100 jimol • L"1, and 200 junol • L"1 groups. MTS was used to detect the effect of marein on HBZY-1 cell proliferation, and the optimal concentration was selected. Western blot was used to test the protein expression of NOX4, TGF-fU, MCP-1, a-SMA, FN, Collagen VI. Adenosine monophosphate activated( AMPK) protein kinase family of AMPK7I, p-AMPK a expression were measured. Results Marein inhibited high glucose palmitate-induced proliferation of HBZY-1 cells, down-regulated NOX4, TGF-(31, MCP-1, cx-SMA, FN and Collagen VI expression in model cells. Meanwhile, marein up-regulated both AMPK 7I and p-AMPKa expression. Conclusions Marein may inhibit the HBZY-1 cell proliferation, oxidative stress, inflammation and fibrosis factors expression in HG + PA induced HBZY-1 cell by activating of both AMPK 7I and AMPK signaling pathway, thus delaying renal injury in diabetic nephropathy.