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吡格列酮对高糖诱导的大鼠肾小管上皮细胞-间充质细胞转分化
的影响及机制研究 Δ
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孙 兰 1,2* ,张 帆 ,石明隽 ,田平平 ,郭 兵 (1.贵州医科大学基础医学院病理生理学教研室,贵阳
550025;2.贵州省常见慢性疾病发病机制及药物研究重点实验室,贵阳 550025)
中图分类号 R965.1 文献标志码 A 文章编号 1001-0408(2020)16-1949-06
DOI 10.6039/j.issn.1001-0408.2020.16.06
摘 要 目的:探讨吡格列酮(PIO)对高糖诱导的大鼠肾小管上皮细胞-间充质细胞转分化(EMT)的影响及可能机制,为防治糖尿
病肾病提供理论依据及新靶点。方法:将大鼠肾小管细胞NRK-52E随机分为对照组(5.5 mmol/L葡萄糖)、高糖组(30 mmol/L葡
萄糖)、PIO干预组(30 mmol/L葡萄糖+5.0 μmol/L PIO)、GW9662干预组(30 mmol/L葡萄糖+5.0 μmol/L PIO+5.0 μmol/L特异性拮
抗剂GW9662)。前3组细胞分别在培养6、12、24、48 h时进行动态检测,GW9662干预组细胞在培养48 h时进行检测。采用Real-
time PCR 法检测细胞中第 10 号染色体缺失的磷酸酶和张力蛋白同源基因(PTEN)、过氧化物酶体增殖物激活受体γ(PPARγ)
mRNA的表达水平;采用Western blotting法检测细胞中PTEN、PPARγ、α-平滑肌肌动蛋白(α-SMA)、上皮钙黏素(E-cadherin)的表
达以及磷脂酰肌醇-3-激酶(PI3K)/蛋白激酶B(AKT)信号通路的变化。结果:随培养时间的延长,与正常组比较,高糖组细胞中
PPARγ、PTEN mRNA及蛋白(除PPARγ 6 h外)表达水平均显著降低,α-SMA、p-AKT (Thr308) 蛋白表达水平均显著升高,E-cadherin蛋
白表达水平显著降低(P<0.05),且呈时间依赖趋势;与高糖组比较,PIO 组细胞中 PPARγ(除 6 h 时的蛋白表达外)、PTEN 的
mRNA及蛋白表达水平均显著升高,α-SMA、p-AKT (Thr308)
(除6 h外)蛋白表达水平均显著降低,E-cadherin蛋白表达水平显著增高
(P<0.05),且呈时间依赖趋势。与高糖组比较,GW9662干预组细胞PTEN、PPARγ mRNA及蛋白表达水平,α-SMA、E-cadherin、
p-AKT (Thr308) 蛋白表达水平的差异均无统计学意义,PIO的作用效应被PPARγ拮抗剂GW9662阻断。结论:在高糖条件下PIO可能
是通过激活PPARγ而实现对PTEN表达的调控,使PI3K/AKT信号通路受到抑制,进而抑制肾小管上皮细胞EMT的发生。
关键词 吡格列酮;肾小管上皮细胞;过氧化物酶体增殖物激活受体γ;第10号染色体缺失的磷酸酶和张力蛋白同源基因;磷脂酰
肌醇-3-激酶/蛋白激酶B信号通路;上皮细胞-间充质细胞转分化;大鼠
Effects and Mechanism Study of Pioglitazone on High Glucose-induced Epithelial-mesenchymal Transition
in Renal Tubular Epithelial Cells of Rat
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SUN Lan ,ZHANG Fan ,SHI Mingjun ,TIAN Pingping ,GUO Bing (1. Dept. of Pathophysiology,
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College of Basic Medicine,Guizhou Medical University,Guiyang 550025,China;2. Guizhou Provincial Key
Laboratory of Pathogenesis & Drug Research on Common Chronic Diseases,Guiyang 550025,China)
ABSTRACT OBJECTIVE:To investigate the effects of pioglitazone(PIO)on high glucose-induced epithelial-mesenchymal
transition(EMT)in renal tubular epithelial cells of rat and its possible mechanism,and to provide theoretic reference and new
target for the prevention and treatment of diabetic nephropathy. METHODS:The rat renal tubular epithelial NRK-52E cells were
randomly divided into control group(5.5 mmol/L glucose),high-glucose group(30 mmol/L glucose),PIO intervention group(30
mmol/L glucose+5.0 μmol/L PIO),GW9662 intervention group(30 mmol/L glucose+5.0 μmol/L PIO+5.0 μmol/L specific anta-
gonist GW9662). The cells of the first 3 groups were detected at 6,12,24,48 h of culture,while those in GW9662 intervention
group were detected at 48 h of culture. mRNA expression of PTEN and PPAR γ were detected by real-time PCR. The protein
expression of PTEN,PPARγ,α-SMA and E-cadherin as well as the changes of PI3K/AKT signaling pathway were determined by
Western blotting assay. RESULTS:With the extension of culture time,compared with control group,the mRNA and protein
expression of PPAR γ (except for protein expression at 6 h) and PTEN in high-glucose group reduced significantly,while the
protein expression of α-SMA and p-AKT (Thr308) increased significantly,and the protein expression of E-cadherin reduced significantly
(P<0.05), showing time-dependent trend. Compared with
Δ 基金项目:国家自然科学基金资助项目(No.81760131);贵州省
high-glucose group, the mRNA and the protein expression
教育厅青年科技人才成长项目(No.黔教合 KY 字〔2018〕191);贵州省
(except for 6 h) of PPAR γ and PTEN were increased
中 医 药 管 理 局 中 医 药 、民 族 医 药 科 学 技 术 研 究 课 题(No.QZYY-
significantly in PIO intervention group, while the protein
2016-077)
*讲师,硕士。研究方向:糖尿病肾病肾脏纤维化。电话: expression of α-SMA and p-AKT (Thr308) were decreased
0851-88416067。E-mail:2277359086@qq.com significantly,and the protein expression of E-cadherin was
# 通信作者:教授,博士生导师,硕士。研究方向:糖尿病肾病相 increased significantly (P<0.05), showing time-dependent
关发病机制。电话:0851-88416067。E-mail:guobingbs@126.com trend. There was no statistical significance in mRNA and
中国药房 2020年第31卷第16期 China Pharmacy 2020 Vol. 31 No. 16 ·1949 ·