简介:Apoptosismanifestsintwomajorexecutionprogramsdownstreamofthedeathsignal:thecaspasepathwayandorganelledysfunction.Animportantantiapoptosisfactor,Bcl-2protein,contributesincaspasepathwayofapoptosis.Calcium,animportantintracellularsignalelementincells,isalsoobservedtohavechangesduringapoptosis,whichmaybeaffectedbyBcl-2protein.WehavepreviouslyreportedthatinHarringtonine(HT)inducedapoptosisofHL-60cells,there'schangeofintracellularcalciumdistribution,ovingfromcytoplastespeciallyGolgi'sapparatustonucleusandaccumulatingtherewiththehighestconcentration.Wereportherethatcaspase-3becomesactivatedinHT-inducedapoptosisofHL-60cells,whichcanbeinhibitedbyoverexpressionofBcl-2protein.NosignofapoptosisorintracellularcalciummovementfromGolgi'sapparatustonucleusinHL-60cellsoverexpressingBcl-2ortreatedwithAc-DEVD-CHO,aspecificinhibitorofcaspase-3.Theresultsindicatethatactivatedcaspase-2canpromotethemovementofintracellularcalciumfromGolgi'sapparatustonucleus,andtheprocessisinhibitedbyAc-DEVD-CHO(inhibitorofcaspase-3),andthatBcl-2caninhibitthemovementandaccumulationofintracellularcalciuminnucleusthroughitsinhibitiononcaspase-3.Calciumrelocalizationinapoptosisseemstobeirreversible,whichisdifferentfromtheintracellularcalciumchangescausedbygrowthfactor.
简介:试验用SSR分子标记对60份宁夏粳稻种质资源进行遗传多样性分析。103对SSR引物表现多态性的有58对,共扩增出212条多态性条带,等位变异范围为2~9,平均每对引物3.7个;多态性信息含量(PIC)变幅为0.032~0.788,平均为0.403;高多态性位点主要发生在3号、6号和11号染色体上,而无多态性或低多态性位点主要发生在1号和10号染色体上;成对供试材料的遗传相似系数GS值变幅为0.642~0.958,平均为0.790,单个供试材料的平均GS值变幅为0.710~0.816,平均为0.781,亲缘关系较近;UPGMA聚类表明,在遗传相似系数约0.785处,供试材料可被分为11类,大部分材料被聚在一类中。
简介:Theeventsofcelldeathandtheexpressionofnuclearmatrixprotein(NMP)havebeeninvestigatedinapromyelocyticleukemiccelllineHL-60inducedwithetoposide.BymeansofTUNELassay,thenucleidisplayedacharacteristicmorphologychange,andtheamountofapoptoticcellsincreasedearlyandreachedmaximunabout39%aftertreatmentwithetoposidefor2h.NucleosomalDNAfragmentationwasobservedaftertreatmentfor4h.ThemorphologicalchangeofHL-60cells,thus,occurredearlierthantheappearanceofDNAladder.Totalnuclearmatrixproteinswereanalyzedby2-dimensionalgelelectrophoresis.Differentialexpressionof59nuclearmatrixproteinswasfoundin4hetoposidetreatedcells.Westernblottingwasthenperformedonthreenuclearmatrixacssociatedproteins,PML,HSC70andNuMA.TheexpressionofthesuppressorPMLproteinandheatshockproteinHSC70weresignificantlyupregulatedafteretoposidetreatment,whileNuMA,anuclearmitoticapparatusprotein,wasdownregulated.Theseresultsdemonstratethatsignificantbiochemicalalterationsinnuclearmatrixproteinstakeplaceduringtheapoptoticprocess.
简介:TodeterminecancerpathwayactivitiesinninetypesofprimarytumorsandNCI60celllines,weappliedaninsilicoapproachbyexamininggenesignaturesreflectiveofconsequentpathwayactivationusinggeneexpressiondata.SupervisedlearningapproachespredictedthattheRaspathwayisactivein~70%oflungadenocarci-nomasbutinactiveinmostsquamouscellcarcinomas,pulmonarycarcinoids,andsmallcelllungcarcinomas.Incontrast,theTGF-β,TNF-α,Src,Myc,E2F3,andβ-cateninpathwaysareinactiveinlungadenocarcinomas.WepredictedanactiveRas,Myc,Src,and/orE2F3pathwayinsignificantpercentagesofbreastcancer,colorectalcarcinoma,andgliomas.OurresultsalsosuggestthatRasmaybethemostprevailingoncogenicpathway.Additionally,manyNCI60celllinesexhib-itedagenesignatureindicativeofanactiveRas,Myc,and/orSrc,butnotE2F3,β-catenin,TNF-α,orTGF-βpathway.Toourknowledge,thisisthefirstcom-prehensivesurveyofcancerpathwayactivitiesinninemajortumortypesandthemostwidelyusedNCI60celllines.The“geneexpressionpathwaysignatures”wehavedefinedcouldfacilitatetheunderstandingofmolecularmechanismsincan-cerdevelopmentandprovideguidancetotheselectionofappropriatecelllinesforcancerresearchandpharmaceuticalcompoundscreening.
简介:目的:研究同侧俯卧位对枕后位产程活跃期停滞胎方位纠正率和自然分娩率的影响。方法:选取我院收治的枕后位产程活跃期停滞产妇160例,采取数字随机法分成同侧组自由组,同侧组采取同侧俯卧位治疗,自由组采取自由卧位治疗,比较两组的治疗对产妇的胎方位纠正率及自然分娩率的影响。结果:同侧组胎方位纠正率90.00%,自由组胎方位纠正率31.25%,同侧组胎方位纠正率高于自由组,差异有统计学意义(P〈0.05)。同侧组自然分娩率91.25%,自由组自然分娩率77.50%,同侧组自然分娩率高于自由组,差异有统计学意义(P〈0.05)。结论:同侧俯卧位可提高枕后位产程活跃期停滞胎方位纠正率和自然分娩率,并且无创简便,是一种有效的干预方法。
简介:目的了解HIV感染者口咽及鼻腔内真菌分离阳性率。方法用无菌拭子采集口咽腔溃疡、白斑、口角炎等和咽颊区黏膜分泌物,鼻腔取下鼻甲黏膜或中鼻道黏膜分泌物,直接接种于1mL沙堡弱液体培养基中。取该离心沉淀物作真菌直接镜检,并接种于科玛嘉念珠菌显色培养基置37℃培养48h后鉴定。如为丝状真菌,转种于察氏琼脂。25℃培养1周后根据菌落形态结合镜下结构鉴定菌种。结果94例HIV感染者在口咽腔中真菌培养阳性62例(66%),分离出65株真菌,在鼻腔中真菌培养阳性48例(51%),分离出57株真菌。结论HIV感染者免疫功能低下,易继发真菌机会性感染,口咽及鼻腔真菌的高寄居率是HIV侵袭性真菌感染的先兆症状,真菌菌种以白念珠菌比例为最高,口咽及鼻腔分别61%和33%。
简介:目的:研究对526例十二指肠溃疡患者采取护理干预后的临床疗效。方法:选取526例于2013年1月--2014年1月份我院确诊十二指肠溃疡,采用抽签方式随机分为2组,即研究组和对照组,2组各263例,对研究组实施护理干预,对比组采取常规护理,观察2组愈后复发率。结果:研究组的溃疡发生率明显低于对照组,研究组患者治愈后3个月的复发率5.7%明显小于12%,其次半年和一年的复发率均明显低于对比组,以p<0.05为标准,具有统计学差异。结论:护理干预能督促患者注意生活方式的规律、坚持治疗、养成良好饮食习惯、告知患者控制情绪、保证充足睡眠、提高患者的自我管理意识,故能更好的预防十二指肠溃疡的复发。值得推广与临床。
简介:【背景】扶桑绵粉蚧是近年来入侵我国的重要害虫,食物是影响其生长发育及种群发展的重要因素。【方法】在室内条件下研究了饥饿对扶桑绵粉蚧不同龄期若虫和初羽化雌成虫存活率和雌成虫产卵量的影响。【结果】扶桑绵粉蚧不同虫态在饥饿条件下存活的时间存在显著差异,表现为雌成虫〉2龄若虫=3龄若虫〉1龄若虫。扶桑绵粉蚧各龄若虫和雌成虫随着饥饿时间的延长,存活率逐渐下降。其中,雌成虫存活率下降速度较慢,完全饥饿8d后存活率仍有50%左右;2、3龄若虫50%个体死亡需要饥饿的时间约为6d,1龄若虫约需5.5d。饥饿会显著降低1龄若虫存活率,但对2、3龄若虫没有显著影响。扶桑绵粉蚧雌成虫饥饿4d对其产卵前期、平均每头雌虫一生的产卵量没有显著影响,但寿命显著低于对照。【结论与意义】扶桑绵粉蚧耐饥力较强,这有助于它在野外建立种群。该结果为进一步评价扶桑绵粉蚧的入侵潜能提供了依据。
简介:目的探寻提高足癣治愈率、降低复发率的有效疗法。方法应用口服特比萘芬联合外用1%特比萘芬乳膏2周连续疗法进行治疗,与特比萘芬系统治疗及1%特比萘芬乳膏局部治疗作同期对照,比较临床疗效与复发率。结果临床疗效:停药时联合治疗组、系统治疗组、局部治疗组3组的痊愈率分别是51.85%、35.19%、31.48%,χ2=6.32,P〈0.05;3组总有效率分别为96.30%、85.19%、72.22%,χ2=12.31,P〈0.05。临床治愈时间(d):联合治疗组7.54±1.09,系统治疗组8.41±1.93,局部治疗组8.70±2.63,F=4.85,P〈0.01;联合治疗组分别与后2组比较,P〈0.01。复发率:联合治疗组5.56%,系统治疗组18.52%、局部治疗组22.22%,χ2=6.64,P〈0.05。结论1种口服抗真菌药物加1种外用抗真菌药物联合治疗足癣疗效好、疗程短、复发率低,无明显副作用。