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ID:55097313
大小:1.03 MB
页数:6页
时间:2020-05-09
《白藜芦醇上调人肺泡上皮细胞SIRT1表达抑制高氧诱导的细胞凋亡.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、590细胞与分子免疫学杂志(ChinJCellMolImmuno1)2015,31(5·论著·文章编号:1007—8738(2015)05—0590—06白藜芦醇上调人肺泡上皮细胞SIRT1表达抑制高氧诱导的细胞凋亡张春艳,李清平,康兰,雷小平,翟雪松,赵帅,张婵,董文斌(泸州医学院附属医院新生儿科,四川泸州646000)[摘要]目的探讨去乙酰化酶SIRT1激动剂白黎芦醇(Res)对高氧诱导人肺泡上皮细胞(HPAEC)凋亡的保护作用。方法体外培养HPAEC,随机分为对照组、高氧组、Res组。培养24h
2、,采用免疫细胞化学sP法检测caspase-9、X联锁凋亡抑制蛋白(XIAP)、SIRT1蛋白的表达,采用MitoS0、JC一1标记结合激光共聚焦显微镜分别检测HPAEC线粒体内活性氧(ROS)及其膜电位的变化,Westernblot法检测SIRT1蛋白的表达,annexinV-FITC/碘化丙啶(PI)双标记结合流式细胞术检测HPAEC细胞凋亡率的变化。结果对照组相比,高氧组HPAEC中caspase-9蛋白表达增强、线粒体内ROS增加、细胞凋亡率增加,而XIAP、SIRT1蛋白的表达减少、膜电位降
3、低;与高氧组相比,Res组HPAEC中caspase-9的表达减弱、线粒体内ROS产生减少、细胞凋亡率降低,XIAP、SIRT1蛋白表达增强、膜电位增高。结论Res通过上调HPAEC中SIRT1的表达,减少ROS的产生从而维持细胞膜电位抑制肺泡上皮细胞凋亡,减轻高氧所致肺损伤。[关键词]高氧;肺泡上皮细胞;去乙酰化酶1;白藜芦醇;凋亡[中图分类号]R285,R392-33,Q255[文献标志码】AResveratrolinhibitshyperxia·inducedcellapoptosisthrou
4、ghup-regulatingSIRT1expressioninHPAECsZHANGChunyan,LIQingping,KANGLan,LEIXiaoping,ZHAIXuesong,ZHAOShuai,ZHANGChan,DONGWenbinDepartmentofNeonatology,AfiliatedHospital,LuzhouMedicalCollege,Luzhou646000,China【AbstractJObjectiveToinvestigatetheprotectionefe
5、ctofsirtuin1(SIRT1)agonistresveratrol(Res)againsttheapoptosisofhumanpulmonaryalveolarepithelialcells(HPAECs)inducedbyhyperxia.MethodsTheHPAECs/nvitrowererandomlydividedintothreegroups:controlgroup,hyperxiagroup,Resgroup.After24-hourculture,theexpression
6、sofcaspase-9,X-linkedinhibitorofapoptosisprotein(XIAP),SIRT1proteinsweremeasuredbySPimmunohistochemistry.Thechangesofreactiveoxygenspecies(ROS)markedwithMitesOXTandmembranepotentialmarkedwithJC-1.nmitochondrionweredetectedbylaserscanningconfocalmicrosco
7、py.TheexpressionofSIRT1proteinwasdeterminedbyWesternblowing,andthechangeofcellapoptosisratewasanalyzedbyflowcytometrycombinedwithannexinV—FITC/PIstaining.ResultsComparedwiththecontrolgroup,theexpressionofcaspase-9,thegenerationofROSinmitochondrionofHPAE
8、Csandthecellapoptosisrateincreasedobviously.TheexpressionsofbothXIAPandSIRT1andmembranepotentialdecreasedevidentlyinthehyperxiagroup.Comparedwiththehyperxiagroup,theexpressionofcaspase-9,thegenerationofReSinmitochondrionofHPAECsa
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