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时间:2017-12-07
《erkl/2信号通路在高糖诱导的hk-2上皮间质转分化中的作用》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、·132·中华临床医师杂志f电子版)2013年9月第7卷第l8期ChinJClinicians(El~ctromcEdition)September15,2013,Vo1.7,No.18基础论著●ERK1/2信号通路在高糖诱导的HK一2上皮间质转分化中的作用赵建荣许珊珊【摘要】目的观察高糖诱导的细胞外信号调节激酶(ERK1/2)信号通路活化在上皮间质转分化中的作用,从而探讨延缓糖尿病肾病肾间质纤维化的发生机制。方法体外培养HK.2细胞,随机分为正常对照组、高糖组、ERK1/2通路抑制剂PD98059+高糖组和高渗组,处理72h后收集细胞,应用免疫细胞化学方法检测a.SMA、CK18的表达
2、;应用Westemblot法检测磷酸化ERK1/2、总ERK1/2表达水平的变化。结果(1)正常对照组胞质有大量CK18蛋白阳性表达,而c【.SMA蛋白表达呈阴性;高糖组胞质中可见大量a-SMA蛋白强阳性染色,而CK18蛋白呈阴性表达;经PD98059处理后,CK18表达较高糖组染色深,而a-SMA表达较高糖组染色浅;高渗组胞质中CK18呈阳性表达,c【.SMA表达呈阴性。(2)正常对照组可见少量总ERK1/2表达,P.ERK1/2蛋白仅有微量表达;经高糖刺激48h后,总ERK1/2表达较正常对照组无明显差异,p-ERK1/2蛋白表达明显增加(户<0.05);而使用PD98059处理后,
3、总ERK1/2的变化不大,但p-ERK1/2蛋白的表达却显著降低(尸4、arepithelialcellsZHAOJian-rong,XUShan-shan.RenalDepartmentNephrology,AffiliatedHospitaloflnnerMongoliaMedicalCollege,Hohhot010050,ChinaCorrespondingauthor:ZHA0Jian—rong,Email:jrzhao33@sohu.corn[Abstract]ObieetiveToobservetheroleofERKsignalingpathwayinepithelial-mesenchymaltransitioninducedbyhighg5、lucose,andtoinvestigatethemechanismoftubuloimerstitialfibrosisassociatedwithdiabeticnephropathy.MethodsThehumanproximaltubularepithelialcellline(HK-2)wererandomlytreatedwimn∞1la1glucose,higlucose,co-incubationofhighglucose、mspecificERKinhibitorPD98059ofD-mannitolfor72h.Theproteinexpressionofa-SMA6、andCK18inal1thecellswasassessedbythemethodofimmunocytochemistry.TheproteinexpressionofERKandP—ERKwasdeterminedbyWestemblotting.Results(1)incontrolgroup,CK18washighlyexpressedinthecytoplasmoftubularepithelialcells,butnota-SMAwereobserved.Highglucoseenhanceda-SMAexpressedinthecytoplasmoftubularepit7、helialcells.Meanwhile,theCK18expressedofscarcely.CombiningtllPD98059andhighglucose,theCK18staininghier,butc【-SMAstainingshallowerthanthatoftreating、】lrithhiglucose.InD-mannitolgroup,CK18wasexpressedinthecytoplasmoftubu
4、arepithelialcellsZHAOJian-rong,XUShan-shan.RenalDepartmentNephrology,AffiliatedHospitaloflnnerMongoliaMedicalCollege,Hohhot010050,ChinaCorrespondingauthor:ZHA0Jian—rong,Email:jrzhao33@sohu.corn[Abstract]ObieetiveToobservetheroleofERKsignalingpathwayinepithelial-mesenchymaltransitioninducedbyhighg
5、lucose,andtoinvestigatethemechanismoftubuloimerstitialfibrosisassociatedwithdiabeticnephropathy.MethodsThehumanproximaltubularepithelialcellline(HK-2)wererandomlytreatedwimn∞1la1glucose,higlucose,co-incubationofhighglucose、mspecificERKinhibitorPD98059ofD-mannitolfor72h.Theproteinexpressionofa-SMA
6、andCK18inal1thecellswasassessedbythemethodofimmunocytochemistry.TheproteinexpressionofERKandP—ERKwasdeterminedbyWestemblotting.Results(1)incontrolgroup,CK18washighlyexpressedinthecytoplasmoftubularepithelialcells,butnota-SMAwereobserved.Highglucoseenhanceda-SMAexpressedinthecytoplasmoftubularepit
7、helialcells.Meanwhile,theCK18expressedofscarcely.CombiningtllPD98059andhighglucose,theCK18staininghier,butc【-SMAstainingshallowerthanthatoftreating、】lrithhiglucose.InD-mannitolgroup,CK18wasexpressedinthecytoplasmoftubu
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