Effects of Mycophenolic Acid on High Glucose-induced Expression of TGF-β and CTGF in Mesangial Cells

The effects of mycophenolic acid （MPA） on high glucose-induced expression of transforming growth factor-β （TGF-β） and connective tissue growth factor （CTGF） in mesangial cells （MC） were investigated. Rat MC were cultured in the presence of different concentrations of MPA （1.0 and 10.0 μmol/L） or MPA plus high glucose for 72 h. The expression of TGF-β and CTGF was detected by Western blot. The results showed that high glucose could induce the expression of TGF-β and CTGF in MC, but MPA could inhibit this effects. MPA did not influence the expression of TGF-β and CTGF in normal glucose. It was concluded that MPA might prevent the progression of diabetic nephropathy by inhibiting the expression of TGF-β and CTGF in MC.

阿魏酸哌嗪对TGF-β_1诱导下肾小球系膜细胞结缔组织生长因子表达及细胞外基质合成的影响

目的探讨阿魏酸哌嗪(PF)对转化生长因子-β1(TGF-β1)诱导下肾小球系膜细胞结缔组织生长因子(CTGF)及细胞外基质成分表达的影响及其意义。方法将体外培养正常大鼠肾小球系膜细胞(HBZY-1)分为正常对照组、TGF-β1刺激组、TGF-β1加50、100、200ng/mLPF干预组。分别利用免疫细胞化学法检测各组细胞CTGF蛋白表达,实时荧光定量逆转录-聚合酶链反应(RT-PCR)测定细胞CTGFmRNA表达量,双抗体夹心ABC-ELISA法检测细胞上清型胶原(Col)、纤维连接蛋白(FN)的含量。结果CTGF蛋白及mRNA、细胞上清Col、FN表达量在TGF-β1组较正常组明显升高(P<0.05),阿魏酸哌嗪组上述指标均低于TGF-β1组(P<0.05)。结论阿魏酸哌嗪能抑制TGF-β1诱导下肾小球细胞外基质(ECM)的合成。其机制可能与下调系膜细胞上CTGF的表达量及功能活性有关。