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《转化生长因子β1-整合素连接激酶信号通路在大鼠肾小管上皮细胞转分化中的作用及大黄素对其的干预效应的论文》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、转化生长因子β1/整合素连接激酶信号通路在大鼠肾小管上皮细胞转分化中的作用及大黄素对其的干预效应的论文【摘要】目的:研究转化生长因子β1/整合素连接激酶(transforminggroyofibroblasttransdifferentiation,temt)中的作用,并探讨大黄素是否是通过抑制tgfβ1/ilk信号通路而影响temt。方法:以体外培养的正常大鼠肾小管上皮细胞株(nrk52e)为研究对象,分为空白对照组、大黄素对照组、il1β诱导组、大黄素阻断组、tgfβ1ⅰ型受体阻断剂(sb431542)阻断组、大黄素和sb431542共同阻断组、大黄素预处理组和大黄素逆转
2、组。nrk52e细胞在上述处理因素下培养48h后,在倒置相差显微镜下观察细胞形态变化;免疫组化双标法检测细胞表型标志物α平滑肌肌动蛋白(alphasmoothmuscleactin,αsma)和e钙黏连素(ecadherin)的表达;免疫组化单染法检测nrk52e细胞tgfβ1和ilk的表达,采用图像分析软件定量分析免疫组化染色结果;酶联免疫吸附测定法测定nrk52e细胞分泌的纤维连接蛋白(fibronectin,fn)含量。结果:与空白对照组比较,il1β诱导temt的同时tgfβ1和ilk表达增加(p<0.05),大黄素可明显抑制il1β诱导的上述变化(
3、p<0.05)。.阻断tgfβ1信号通路后,il1β诱导的temt明显受抑,且ilk表达减少。与大黄素阻断剂组比较,大黄素预处理不能预防il1β诱导的temt,大黄素不能逆转il1β诱导的temt。相关分析显示,tgfβ1表达与αsma、fn、ilk表达呈正相关,与e钙黏连素表达呈负相关。ilk表达与αsma、fn表达呈正相关,与e钙黏连素表达呈负相关。结论:il1β通过激活tgfβ1/ilk信号通路蛋白而诱导temt,大黄素通过抑制tgfβ1/ilk信号通路蛋白而抑制il1β诱导temt。【关键词】白细胞介素1β;大黄素;转化生长因子β1;整合素连
4、接激酶;大鼠chentf,chenm,qinjh,y.jchinintegrmed.2009;7(1):5964.receivedjuly10,2008;acceptedseptember29,2008;publishedonlinejanuary15,2009.indexed/abstractedinandfulltextlinkoutatpubmed.journaltitleinpubmed:zhongxiyijiehexuebao.freefulltext(htmlandpdf)isavailableat.for20090109openaccessintervention
5、aleffectsofemodinontransforminggroyofibroblaststingfangchen1,mingchen1,jianhuaqin1,mingyongentofnephrology,affiliatedhospital,luzhoumedicalcollege,luzhou,sichuanprovince646000,china2.laboratoryofinfectionandimmunity,affiliatedhospital,luzhoumedicalcollege,luzhou,sichuanprovince646000,chinao
6、bjective:tostudytheeffectsoftransforminggroyofibroblasttransdifferentiation(temt),andtoinvestigateodininhibitsil1βinducedtemtthroughthetgfβ1/ilksignalechanism.methods:normalratkidneyepithelialcellline(nrk52e)odincontrolgroup,il1βinducedgroup,emodininhibitedgroup,sb431542(tgfβ1typeⅰrecep
7、torblocker)inhibitedgroup,emodinplussb431542inhibitedgroup,emodinpretreatedgroupandemodinreversedgroup.after48hourculture,morphologicalchangesofthenrk52ecellsicroscope.theexpressionsofalphasmoothmuscleactin(αsma)andecadherinmuno