GPx activity in the NRK-52E cells (n = 4).

NG(normal glucose), HG(high glucose), HM(5.5 mmol/L glucose plus 24.5 mmol/L mannitol), HBCM7(high glucose plus 10−5 mol/L β-casomorphin-7), MBCM7(high glucose plus 10−7 mol/L β-casomorphin-7), LBCM7(high glucose plus 10−9 mol/L β-casomorphin-7), HL(high glucose plus 10−4 mol/L losartan), ML(high glucose plus 10−5 mol/L losartan), LL(high glucose plus 10−6 mol/L losartan), NL(normal glucose plus 10−4 mol/L losartan). Data are mean ± SEM (n = 4 for each group). *P<0.05, **P<0.01 compared with NG, #P<0.05, ##P<0.01 compared with HG.