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1、經(jīng)性傳播途徑高暴露HIV1持續(xù)血清陰性者淋巴細(xì)【】目的了解經(jīng)性傳播途徑高暴露hiv1持續(xù)血清陰性者淋巴細(xì)胞亞群表達(dá)及其免疫活化狀態(tài),探討經(jīng)性途徑高暴露hiv1不易感的免疫基礎(chǔ)。方法收集37例經(jīng)性傳播途徑高暴露hiv1持續(xù)血清陰性者(簡稱heps人群)、65例經(jīng)性傳播途徑感染hiv1者(簡稱hiv+人群)、128例健康對(duì)照者(簡稱hc人群)的抗凝全血,用流式細(xì)胞儀檢測。結(jié)果heps人群和hc人群的cd4絕對(duì)數(shù)、cd4/cd8比值高于hiv+人群(p0.001),而該兩類人群的cd8+絕對(duì)數(shù)則低于hiv+人群(p0.001);heps人群和hc人群的cd38+/cd4+、hla
2、dr+cd38+/cd4+百分比低于hiv+人群(p0.001),同時(shí)heps人群的hladr+cd38+/cd4+百分比低于hc人群(p0.05);heps人群的hladr+/cd4+百分比低于hiv+人群和hc人群(p0.001)。結(jié)論heps人群對(duì)hiv1的不易感性可能與其t淋巴細(xì)胞表面標(biāo)志活化抗原表達(dá)水平處于較低水平狀態(tài)有關(guān)。【關(guān)鍵詞】hiv1;hiv血清陰性;t淋巴細(xì)胞亞群studyontheexpressionandactivationoftlymphocytesubsetsinhighlyexposedhiv1butpersistentlyseronegat
3、iveindividualsbysexualtransmissionentofepidemiologyandstatistics,schoolofpublichealth,tongjimedicalcollege,huazhonguniversityofscienceandtechnology,edicalcollegeofyangtzeuniversity,jingzhou434000,china;3.shenzhencenterfordiseasecontrolandprevention,shenzhen518020,china;4.shenzhenmunicipalchroni
4、cdiseasehospital,shenzhen518020,china【abstract】objectivetounderstandthedistributionandimmuneactivationstatusoftlymphocytesubsetsinhighlyexposedhiv1andpersistentlyseronegative(heps)individuals,andexploretheimmunologicmechanismofnonsusceptibilitytohiv1bysexualtransmissioninhepsindividuals.meth
5、odsfreshperipheralvenousblood37heps,65hiv1infectedindividualsand128healthycontrols.fourcolorsfloetryphocytesubsetsandexpressionofhladr,cd38oncd4+tcells.resultscd4+counts,cd4/cd8ratioeanarkerhladroncd4+tcellsisataloission.【keyphocytesubsets我國新發(fā)現(xiàn)hiv感染人數(shù)呈現(xiàn)明顯上升趨勢(shì),近幾年艾滋病疫情每年以30%左右的幅度增長,阻止艾滋病在我國蔓
6、延的形勢(shì)十分嚴(yán)峻。.133229.傳染病預(yù)防最有效的措施是對(duì)人群接種疫苗,但艾滋病疫苗研發(fā)雖然投入巨大,短期似乎看不到很大希望,其中一個(gè)重要原因就是對(duì)hiv對(duì)人體免疫系統(tǒng)相互作用的規(guī)律等問題缺乏真正意義上的了解[1]。近年來,由于艾滋病疫情控制效果遠(yuǎn)未達(dá)到預(yù)期目標(biāo),艾滋病疫苗研究亦未取得明顯進(jìn)展,一些學(xué)者開始將注意力集中到兩類特殊人群,一類人群是較高頻率暴露于hiv但未感染,hiv抗體呈陰性反應(yīng),該類人群被稱為hiv暴露后未感染者(hivexposedseronegativesubjects,esnsores人群)[2]或hiv高暴露持續(xù)血清陰性者(highlyexposedand
7、persistentlyseronegative,heps人群)[3];另一類人群為感染hiv后長期不進(jìn)展者(longtermnoprogressors,ltnp)。目前,對(duì)hiv不易感性的影響因素和機(jī)理尚不明確,國內(nèi)外對(duì)heps人群不易感hiv的研究并不多見。經(jīng)性接觸傳播是目前全球主要的hiv1感染傳播途徑。全球大約70%~80%感染者是通過性接觸感染上hiv1,其中異性間性接觸傳播占70%以上,而男性同性戀性接觸傳播占5%~10%。近年來,隨著