資源描述:
《hpv16e7多肽體外誘生抗原特異性細(xì)胞毒性t細(xì)胞表型及功能的研究》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在教育資源-天天文庫(kù)。
1、3422U鲞塑ChinJDermatol,Mav2010.Vo1.43.N0.5·論著·HPV16E7多肽體外誘生抗原特異性細(xì)胞毒性T細(xì)胞表型及功能的研究錢起豐李芳谷李青【摘要】目的探討高致癌性HPV16E7病毒抗原肽體外誘生HLfA—A2陽(yáng)性正常人外周血抗原特異性CD8細(xì)胞毒性T細(xì)胞(CTL)的表型及功能狀態(tài)。方法以HPV16E7合成多肽、重組人IL一7、IL一2體外刺激26例HlJA—A2陽(yáng)性正常人外周血T細(xì)胞,用HLA—A*0201限制性表位肽/YMLDLQPETF五聚體技術(shù),結(jié)合流式細(xì)胞儀對(duì)抗原特異性CTL進(jìn)行頻率、表型[CD45RACD27一效應(yīng)性CTL、CD45RA—CD27效
2、應(yīng)性記憶CTL(T~)、CD45RA—CD27中樞性記憶CTL(Tc)、CD45CD27初始性CTL]及功能(穿孑L素、顆粒酶B、FasL)分析,并以無(wú)關(guān)肽HBV一。作為陰性對(duì)照。結(jié)果病毒多肽體外刺激T細(xì)胞7d后,抗原特異性CD8CTL數(shù)為(0.73±0.33)%,比未刺激組的(0.02±0.03)%明顯增多(P<0.01)。進(jìn)一步分析,在抗原特異性CTL中,效應(yīng)性CTL、TrI1c及初始性CTL百分比分別為(26.07±13.46)%、(7.97±7.11)%、(33.25-4-19.68)%及(32.73±13.89)%,均比未刺激組的(0.02±0.03)%、(0.02±0.03)%
3、、(0.02±0.03)%及(0.02±0.05)%明顯增多,P值均<0.01。HPV16E7表位特異性CTL分泌穿孑L素、顆粒酶B、Fas-I的水平分別為(47.01±18.69)%、(80.53±13.32)%及(26.48±7.81)%,均比未刺激組的(0.38±0.55)%、(0.34±0.22)%及(0.16±0.16)%明顯增多,P值均<0.01。結(jié)論HPV16E7。多肽誘導(dǎo)CD8+T細(xì)胞克隆擴(kuò)增,產(chǎn)生抗原特異性CD8CTL,分泌毒性細(xì)胞因子,通過(guò)不同機(jī)制特異性殺傷病毒感染的靶細(xì)胞,在抗病毒免疫應(yīng)答中發(fā)揮作用?!娟P(guān)鍵詞】人乳頭瘤病毒16;乳頭瘤病毒E7蛋白質(zhì)類;T淋巴細(xì)胞,細(xì)胞
4、毒性;表型Studyonphenotypeandfunctionofantigen·specificCD8cytotoxicTcellsinducedbyHPV16E7peptideinvitroQIANQirig,LIFang一,L1Qing.ShenzhenInstituteofDermatology,CenterforSControlandResearch.Shenzhen518o2o.Guangdong,China【Abstract】ObjectiveToinvestigatethephenotypeandfunctionofantigen—specificCD8cytotoxic
5、Tcells(CTL)fromHLA—A2healthyhumandonorsinducedbyhigh—carcinogenicHPV16E7peptidenvitro.MethodsPeripheralbloodTcellsfrom26HLA—A2heahhyhumandonorswereincubatedwithHPV16E7I1peptide(HLA—A*0201/YMLDLQPETT),recombinanthumaninterleukin7(IL一7)andIL一2for7daystoyieldantigen—specificCD8CTL.Then.four—colorflow
6、cytometricanalysiswasperformedtodetecttheper—centageofantigen—specificCD8CTLexpressingdifferentsurfacemarkersincludingCD45andCD27.Theexpressionofthreeintracellularcytokinesincludingperfotin.granzyme—BandFasLintheantigen—specificCD8CTLwasalsomeasuredbyintracellularflowcytometry.Awrongpeptide,HBV一18
7、(FLPSDFFPSV),wasusedasanisotypecontro1.ResultsAsignificantincreasewasobservedinthepercentageofantigen—spe—cificCD8CTLinperipheralTcellsstimulatedwithHPV16E7一peptidecomparedwiththenon—stimulatedTcells(0.73%±0.33%v