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大小:1.42 MB
页数:8页
时间:2020-05-14
《硫化氢活化ERK抵抗内质网应激诱导的心肌细胞凋亡.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、第44卷第3期第251页华中科技大学学报(医学版)Vo1.44No.3P.2512015年6月ActaMedUnivSciTechnolHuazhongJun.2015硫化氢活化ERK抵抗内质网应激诱导的心肌细胞凋亡*祝晓莹,王桂关,胡敏,陆欢,邓晶,严晓红L△武汉大学基础医学院生理学系,武汉430071河南科技大学医学院病原生物学教研室,洛阳471003摘要:目的探讨硫化氢(Hs)对心肌的保护作用是否通过激活细胞外信号调节激酶(ERK)通路来抵抗心肌缺血诱导的内质网应激所致的心肌细胞凋亡。方法6O只雄性SD大鼠随机分为对照组、ISO模型组、NaHS+IS
2、0组及PD98059阻断组,每组各15只。对照组大鼠注射等体积生理盐水;Is0模型组大鼠第1、2天腹腔注射生理盐水,第3、4天注射完生理盐水30rain后背部皮下分别注射10mg/kg和5mg/kg的ISO;NaHs+ISO组大鼠腹腔注射NariS14“mol/kg,1次/d,连续2d后,改为2次/d,连续2d,并在后2d的第1次注射30min后,于背部皮下分别注射10mg/kg和5mg/kg的ISO,1次/d;PD98059阻断组大鼠在上述NariS+ISO组大鼠处理基础上,于注射IsO之前经尾静脉注射MEK/ERK抑制剂PD98059(4mg/kg),
3、1次/d,连续2d。每组最后一次注射ISO并禁食12h后,检测心电图、心功能指标;测定血浆中HS浓度变化;TTC染色测定心肌梗死面积;TUNEL法检测心肌细胞凋亡指数(AI);免疫组织化学方法检测心肌中GRP78、CHOP及ERK磷酸化(p—ERK)蛋白的表达。结果Is0模型组大鼠血浆的Hs含量明显低于对照组(P4、RK表达明显增多(P<0.01),AI、心肌梗死面积明显减小(均P<0.05);与NariS+ISO组相比,PD98059阻断组大鼠心肌组织中GRP78、CHOP的表达、AI、梗死面积均显著增加(均P5、胞外信号调节激酶;GRP78;CHOP中图分类号:R363.1DOI:10.3870/j.issn.1672—0741.2015.03.002HydrogenSulfideInhibitsEndoplasmicReticulumStress—inducedMyocardialCellApoptosisbyActivatingERKZhuXiaoying'。WangGuimei。HuMinetalDepartmentofPhysiology,SchoolofBasicMedicine,WuhanUniversity,Wuhan430071,ChinaDepa6、rtmentofPathogenBiology,MedicalCollegeofHenanUniversityofScienceandTechnology,Luoyang471003,ChinaAbstractObjectiveToinvestigatewhetherhydrogensulfide(H2S)protectscardiomyocytesfromendoplasmicreticulumstress—inducedapoptosisbyactivatingtheextracellularsigna1regulationkinase(ERK).Me7、thodsAtota1of60SDratswererandomlydividedintocontrolgroup,ISOgroup,NaHS+ISOgroupandPD98059group(n=15ineachgroup).Animalsincon—trolgroupwasinjectedwithsaline;thoseinISOgroupwasintraperitoneal1yinjectedwithsalineatthesamevolumeaseontrolgroupfor4days.andsubcutaneouslyinjectedwithISOat8、10mg/kgand5mg/kg,respectively,ont
4、RK表达明显增多(P<0.01),AI、心肌梗死面积明显减小(均P<0.05);与NariS+ISO组相比,PD98059阻断组大鼠心肌组织中GRP78、CHOP的表达、AI、梗死面积均显著增加(均P5、胞外信号调节激酶;GRP78;CHOP中图分类号:R363.1DOI:10.3870/j.issn.1672—0741.2015.03.002HydrogenSulfideInhibitsEndoplasmicReticulumStress—inducedMyocardialCellApoptosisbyActivatingERKZhuXiaoying'。WangGuimei。HuMinetalDepartmentofPhysiology,SchoolofBasicMedicine,WuhanUniversity,Wuhan430071,ChinaDepa6、rtmentofPathogenBiology,MedicalCollegeofHenanUniversityofScienceandTechnology,Luoyang471003,ChinaAbstractObjectiveToinvestigatewhetherhydrogensulfide(H2S)protectscardiomyocytesfromendoplasmicreticulumstress—inducedapoptosisbyactivatingtheextracellularsigna1regulationkinase(ERK).Me7、thodsAtota1of60SDratswererandomlydividedintocontrolgroup,ISOgroup,NaHS+ISOgroupandPD98059group(n=15ineachgroup).Animalsincon—trolgroupwasinjectedwithsaline;thoseinISOgroupwasintraperitoneal1yinjectedwithsalineatthesamevolumeaseontrolgroupfor4days.andsubcutaneouslyinjectedwithISOat8、10mg/kgand5mg/kg,respectively,ont
5、胞外信号调节激酶;GRP78;CHOP中图分类号:R363.1DOI:10.3870/j.issn.1672—0741.2015.03.002HydrogenSulfideInhibitsEndoplasmicReticulumStress—inducedMyocardialCellApoptosisbyActivatingERKZhuXiaoying'。WangGuimei。HuMinetalDepartmentofPhysiology,SchoolofBasicMedicine,WuhanUniversity,Wuhan430071,ChinaDepa
6、rtmentofPathogenBiology,MedicalCollegeofHenanUniversityofScienceandTechnology,Luoyang471003,ChinaAbstractObjectiveToinvestigatewhetherhydrogensulfide(H2S)protectscardiomyocytesfromendoplasmicreticulumstress—inducedapoptosisbyactivatingtheextracellularsigna1regulationkinase(ERK).Me
7、thodsAtota1of60SDratswererandomlydividedintocontrolgroup,ISOgroup,NaHS+ISOgroupandPD98059group(n=15ineachgroup).Animalsincon—trolgroupwasinjectedwithsaline;thoseinISOgroupwasintraperitoneal1yinjectedwithsalineatthesamevolumeaseontrolgroupfor4days.andsubcutaneouslyinjectedwithISOat
8、10mg/kgand5mg/kg,respectively,ont
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