简介:ObjectivesToinvestigatetheeffectofGαq/11signalingpathwayandATP-sensitivepotassiumchannel(KATPchannel)onischemicpreconditioning(IPC)protectioninrathearts.MethodsTwoseriesofexperimentswereperformedinWistarrathearts.Inthefirstseriesofexperiment,ischemicpreconditioningwasinducedbyleftanteriordescendingocclusion(three,5minepisodesseparatedby5minofreperfusion),ischemia-reperfusioninjurywasinducedby30mincoronaryarteryocclusionfollowedby90minreperfusion.Hemodynamics,infarctsizeandscoresofventriculararrhythmiasweremeasured.TheexpressionofGαq/11proteinintheheartwasmeasuredbyWesternblotanalysisinthesecondseries.ResultsIschemicpreconditioningratsshoweddecreasedinfarctsizeandscoresofventriculararrhythmiavsnon-IPcontrolrats.TheeffectofIPCwassignificantlyattenuatedbyglibenclamide(1mg/kg,ip),anonselectiveKATPchannelinhibitor.IPCcausedasignificantincreaseintheexpressionofGαq/11protein.ConclusionsActivationsofGαq/11signalpathwayandKATPchannelplayedsignificantrolesintheclassicalcardioprotectionofischemicprecon-ditioningratheartandmightbeanimportantmechanismofsignaltransductionpathwayduringtheischemicpreconditioning.
简介:摘要目的联合应用无创产前检测(non-invasive prenatal testing,NIPT)、染色体核型分析和全基因组测序(whole genome sequencing,WGS)诊断1例46,XN,del(11)(q14q22)胎儿,并对其亲代进行染色体检查和家系分析,为遗传咨询提供依据。方法抽取孕妇静脉血样进行NIPT检测;抽取孕妇静脉血样、脐血样以及男方静脉血样进行染色体核型分析和WGS检测。结果NIPT提示胎儿存在11号染色体部分缺失。脐血染色体因分辨率低未发现异常。脐血WGS检测结果为46,XN,del(11q14.3q22.1).seq[GRCh37/hg19](90 623 404-97 469 319)×1,6.85 Mb,最终诊断胎儿核型为46,XN,del(11)(q14q22),孕妇为46,XX,del(11)(q14q22)[8]/46,XX[92],其丈夫为46,XY。夫妇两人WGS检测均未发现del(11)(q14.3q22.1)。结论胎儿的del(11)(q14q22)来源于孕妇的低比例嵌合体。综合应用NIPT、染色体核型分析、WGS等技术能够准确诊断染色体病,减少误诊和漏诊。
简介:摘要:本文论述了对东风11G机车构架损坏的电机吊座(二)进行机加工、划线、定位、焊接和消除应力,延长结构件的使用寿命,降低修理成本。