高糖环境下缬沙坦对肾小管上皮细胞-间充质转化过程中骨膜蛋白、转录激活因子1的影响
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篇名: 高糖环境下缬沙坦对肾小管上皮细胞-间充质转化过程中骨膜蛋白、转录激活因子1的影响
TITLE:
摘要: 目的:研究在高糖环境下缬沙坦对肾小管上皮细胞-间充质转化(EMT)过程中骨膜蛋白(Periostin)、转录激活因子1(AP-1)的影响。方法:体外高糖环境下培养人肾小管上皮细胞(HK-2细胞),分为空白对照组和缬沙坦高、中、低剂量组(10-3、  10-4、10-5 mol/L),作用48 h;另设正常对照组。观察各组HK-2细胞形态学变化,检测各组HK-2细胞活力(OD值),细胞中Ⅲ型胶原含量、AP-1蛋白表达和Periostin、AP-1 mRNA表达。结果:与正常对照组比较,其余各组HK-2细胞部分细胞间隙增大并与附近的细胞脱离接触,细胞分裂旺盛,细胞活力、Ⅲ型胶原含量、AP-1蛋白表达和Periostin、AP-1 mRNA表达均增强(P<0.05)。与空白对照组比较,缬沙坦高、中、低剂量组细胞活力、Ⅲ型胶原含量、AP-1蛋白表达和Periostin、AP-1 mRNA表达均更低(P<0.05),其中缬沙坦中剂量组作用最明显(P<0.01)。结论:体外高糖环境下可促进HK-2细胞EMT过程;缬沙坦可通过抑制AP-1的过表达进而下调转分化的肾小管上皮细胞中Periostin蛋白表达,从而减缓EMT过程。
ABSTRACT: OBJECTIVE: To study the effects of valsartan on perionstin and AP-1 during renal tubular epithelial cell-mesenchymal tissue (EMT) transformation under the condition of high glucose. METHODS: Human renal tubular epithelial cells (HK-2 cells) were cultured in vitro under the condition of high glucose, and then divided into blank control group, valsartan high-dose, middle-dose and low-dose groups (10-3, 10-4,10-5 mol/L); normal control group was set up. They were treated for 48 h. The morphology of HK-2 cells was observed; cell viability (OD value) of HK-2 cells were detected, and the content of Ⅲ type collagen, the protein expression of AP-1 and mRNA expression of Periostin and AP-1 were detected. RESULTS: Compared with normal control group, intercellular space of HK-2 cells enlarged and HK-2 cells were separated from nearby cells; exuberant cellular fission, cell viability, the content of Ⅲ type collagen, the protein expression of AP-1, mRNA expression of periostin and AP-1 were strengthened in other group (P<0.05). Compared with blank normal group, cell viability, the content of Ⅲ type collagen, the protein expression of AP-1, mRNA expression of periostin and AP-1 were lower in valsartan high-dose, medium-dose and low-dose groups (P<0.05), especially in valsartan medium-dose group (P<0.01). CONCLUSIONS: High glucose can promote EMT of HK-2 cells. Valsartan can down-regulate the protein expression of Periostin in renal tubular epithelial cell and slow down EMT via inhibiting the expression of AP-1.
期刊: 2016年第27卷第13期
作者: 张光明,弓慧杰
AUTHORS: ZHANG Guangming1,GONG Huijie
关键字: 缬沙坦;肾小管上皮HK-2细胞;上皮细胞-间充质转化;骨膜蛋白;转录激活因子1
KEYWORDS: Valsartan; Renal tubular epithelial HK-2 cell; Epithelial cell-mesenchymal tissue transformation; Periostin; AP-1
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