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大鼠腹膜间皮细胞中转化生长因子β1对TNF-α表达的影响

, PP. 667-670

Keywords: 转化生长因子-β,1,Smad7,p38丝裂原活化蛋白激酶,肿瘤坏死因子-α

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Abstract:

目的探讨在大鼠腹膜间皮细胞(RPMC)中转化生长因子β1(TGF-β1)对肿瘤坏死因子-α(tumornecrosisfactor-α,TNF-α)表达的影响及其机制。方法在体外培养的大鼠腹膜间皮细胞模型中,加入TGF-β1(10ng/ml)预刺激,研究RPMC中肿瘤坏死因子-α(TNF-α)的表达;体外转染Smad7至RPMC后,研究其对TGF-β1(10ng/ml)刺激后RPMCs中TNF-α和p38表达的影响。p38抑制剂SB203580(10umol/L)预处理RPMCs后,加入TGF-β1(10ng/ml)刺激,研究抑制p38信号通路后对TNF-α表达的影响。结果RT-PCR结果显示,与0h对照组相比,3h、6h、12hTGF-β1刺激组TNF-α表达明显增加(PPP结论在大鼠腹膜间皮细胞中,TGF-β1能促进TNF-α的表达,其作用机制可能是依赖活化p38MAPK信号通路来实现的。

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