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时间:2020-06-05
《高糖刺激INS-1细胞DNase Ⅰ表达升高对细胞凋亡的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中日友好医院学报2014年第28卷第3期JournalofChina-JapanFriendshipHospital,2014Jun,Vo1.28,』v0.3l57高糖刺激INS一1细胞DNaseI表达升高对细胞凋亡的影响朱斌.一,李平。,严美花,赵婷婷,王华(1.中国医学科学院北京协和医学院研究生院,北京100730;2.中日友好医院临床医学研究所,北京100029)摘要目的:探讨脱氧核糖核酸酶I(DNaseI)在高糖引起的胰岛B细胞凋亡过程中的作用。方法:实验分3组。正常组、高糖组和高糖+DNaseIsiRNA组。其中正常组给予含有11.1mmo1]L葡萄
2、糖浓度的培养基外,其余2组均给予葡萄糖浓度为30mmol/L的培养基。通过转染外源性DNaseIsiRNA,敲降高糖培养的INS一1细胞内DNaseI的表达。采用Westernblot检测DNaseI、caspase一3蛋白表达,流式细胞仪观察细胞凋亡的变化。结果:与正常组相比,高糖可以显著增加INS一1细胞DNaseI和caspase一3的蛋白表达水平(P3、05)。流式细胞仪结果显示,高糖明显导致细胞凋亡率升高(16.7%),而敲降DNaseI后则明显减少细胞凋亡的发生(9.9%)。结论:高糖可以诱导细胞内DNaseI的表达升高,从而介导胰岛B细胞的凋亡,该研究可能为胰岛B细胞凋亡的机制研究提供新的证据。关键词:脱氧核糖核酸酶I;B细胞;凋亡中图分类号:R329.2+6文献标识码:A文章编号:1001—0025(2014)03—0157—04doi:10.39690.issn.1001—0025.2014.03.008EfectsofhighglucosesimulatedDNaseIincreaseonINS-4、1cellapoptosis//ZHUBin,LIPing,YANMei—hua,etal//JournalofChina-JapanFriendshipHospital,2014Jun,28(3):157-160AbstractObjective:ToinvestigatetheeffectsofDNaseIintheprocessof[3cellapoptosisinhighglucoseenvironment.Methods:INS-tcellwassimulatedby30mmol/Lglucose,andweredividedintothreegro5、ups:normalgroup,highglucosegroup,andhighglucoseplussiRNAgroup.TheNormalgroupwasculturedinthemediumwith11.1mmol/Lglucoseconcentration,andtheother2groupwasculturedinthe30mmol/Lglucose.DNaseIlevelwasknockeddownbysiRNAinhighglucoseplussiRNAgroup,cellapoptosisratewasevalu—atedbyflowcytom6、etryandtheproteinlevelofDNaseIandcaspase一3wasobservedbyWesternblot.Re·suits:ComparedwithnolTnalgroup,highglucosecanincreasetheDNaseIandcaspase-3expressioninhighglucosegroup.However,DNaseIknockeddowncansignificantlylowerthecaspase-3expression.Theflowcy—tometryresultsshowedthathighglu7、cosecancauseINS-1cellapoptosisrateincrease(16.7%),howeverwhenDNase1wasknockeddown,theapoptosisrate(9.9%)canbegreatlyreduced.Conclusion:HighglucosecancauseINS一1cellapoptosisbyincreasetheexpressionofDNaseI.KeywordsdeoxyribonucleaseI;Bcells;apoptosisAuthor’SaddressGraduateSchoolofPekin8、gUnionMedicalCoHege
3、05)。流式细胞仪结果显示,高糖明显导致细胞凋亡率升高(16.7%),而敲降DNaseI后则明显减少细胞凋亡的发生(9.9%)。结论:高糖可以诱导细胞内DNaseI的表达升高,从而介导胰岛B细胞的凋亡,该研究可能为胰岛B细胞凋亡的机制研究提供新的证据。关键词:脱氧核糖核酸酶I;B细胞;凋亡中图分类号:R329.2+6文献标识码:A文章编号:1001—0025(2014)03—0157—04doi:10.39690.issn.1001—0025.2014.03.008EfectsofhighglucosesimulatedDNaseIincreaseonINS-
4、1cellapoptosis//ZHUBin,LIPing,YANMei—hua,etal//JournalofChina-JapanFriendshipHospital,2014Jun,28(3):157-160AbstractObjective:ToinvestigatetheeffectsofDNaseIintheprocessof[3cellapoptosisinhighglucoseenvironment.Methods:INS-tcellwassimulatedby30mmol/Lglucose,andweredividedintothreegro
5、ups:normalgroup,highglucosegroup,andhighglucoseplussiRNAgroup.TheNormalgroupwasculturedinthemediumwith11.1mmol/Lglucoseconcentration,andtheother2groupwasculturedinthe30mmol/Lglucose.DNaseIlevelwasknockeddownbysiRNAinhighglucoseplussiRNAgroup,cellapoptosisratewasevalu—atedbyflowcytom
6、etryandtheproteinlevelofDNaseIandcaspase一3wasobservedbyWesternblot.Re·suits:ComparedwithnolTnalgroup,highglucosecanincreasetheDNaseIandcaspase-3expressioninhighglucosegroup.However,DNaseIknockeddowncansignificantlylowerthecaspase-3expression.Theflowcy—tometryresultsshowedthathighglu
7、cosecancauseINS-1cellapoptosisrateincrease(16.7%),howeverwhenDNase1wasknockeddown,theapoptosisrate(9.9%)canbegreatlyreduced.Conclusion:HighglucosecancauseINS一1cellapoptosisbyincreasetheexpressionofDNaseI.KeywordsdeoxyribonucleaseI;Bcells;apoptosisAuthor’SaddressGraduateSchoolofPekin
8、gUnionMedicalCoHege
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