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Effect of p38 MAPK on high glucose induced epithelial-mesenchymal-transi- ion of human renal tubular epithelial cells
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- Author:
- No author available
- Journal Title:
- JOURNAL OF THE FOURTH MILITARY MEDICAL UNIVERSITY
- Issue:
- 18
- DOI:
- 10.3321/j.issn:1000-2790.2008.18.003
- Key Word:
- p38丝裂原活化蛋白激酶类;肾小管;上皮细胞;上皮-间质转分化
Abstract： 目的:探讨p38 MAPK在高糖诱导的肾小管上皮细胞转分化中的作用.方法:将体外培养的人肾小管上皮细胞(HK2)分为正常对照组(NG),高糖组(HG),无关siRNA转染组(RG)、转染p38 MAPK siRNA 24 h组(24hG)、转染p38MAPK siRNA 48 h组(48hG).免疫细胞化学法检测α-平滑肌肌动蛋白(α-SMA)和细胞角蛋白(CK)的表达,RT-PCR法检测CK mRNA的表达,Western Blot检测p38 MAPK的活化及α-SMA的表达.结果:p38 MAPK siRNA能显著抑制高糖诱导的p38 MAPK过度活化;高糖刺激后肾小管上皮细胞α-SMA蛋白表达明显高于正常组(P＜0.05),而p38 MAPK siR-NA转染组其水平显著低于高糖组(P＜0.05);高糖诱导HK2细胞CKmRNA和蛋白水平明显降低(P＜0.05),而p38 MAPKsiRNA转染后其水平显著高于高糖组(P＜0.05);结论:高糖可导致肾小管上皮细胞p38 MAPK通路的激活而下调CK,同时导致α-SMA蛋白的表达,诱导其表型转化.
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