简介:Objective:Toanalyzesubtypesandquasi-speciesofisolatedvirusesfromHIV-1infectedindividualsamongthepopulationepidemiologicaldynamicsoflocalHIV-1isolates,thuslayingafoundationfordesigningacandidateAIDSvaccine.Methods:Byhetero-duplexmobilityassay(HMA)andsinglestrandconformationpoly-morphism(SSCP)analysisonampliconsfromsingle-primedpolymerasechainreaction(SP-PCR),subtypesandquasi-speciesoftestedHIV-1isolateswereelucidated,andampliconsweresequencedforconfirmation.Results:Specificampliconsfromdifferentsubtypesandquasi-speciesofHIV-1couldbediscerniblebyHMAandSSCPanalysis.HIV-1isolatesfromdifferentpatientsmightbeeitheradifferentsrbtypeoranidenticalsubtype,andHIV-1isolatesfromanindividualwerepresentinapopulationofquasi-species.
简介:Objective:ToevaluatethehumoralimmuneinductioninratsofacandidateAIDSvaccineexpressingthegagp24genefromasubtypeBHIV-1isolate.Methods:Theamplifiedp24genewasinsertedintoaneukaryoticexpressionvectortoformthesupercoiledDNAvaccine.ThelinearizedexpressedDNAvaccinewaspreparedfromtheexpressionplasmidbypolymerasechainreaction(PCR).TheantigengeneexpressioninratsofthelinearizedandsupercoiledDNAvaccineswereinvitroandinvivodetected.Results:InvitrotranscriptionandNorthernhybridizationshowedthatthelinearizedDNAvaccinecouldsynthesizeamountsofp24mRNAsimilartothesupercoiledDNAvaccine.AntibodyassaysofinoculatedratsconfirmedthatthelinearizedexpressionDNAcouldinduceaslightlyhigherantibodytiterthantheexpressionplasmid,whilethehighestantibodytiterhadbeeninducedbyplasmidplusadjuvantinoculation.Conclusion:TheconstructionofacandidateAIDSvaccinebasedonthep24genecouldshedlightonapotentialHIVvaccine,meritingevaluationinarhesusmacaqueSHIV-AIDSmodel.
简介:目的通过借助经典光毒剂8-甲氧补骨酯素(8-MOP)研究UVA、UVB、UVA+UVB3种不同光源对光毒性斑贴试验结果的影响.方法豚鼠138只,健康受试者22名.光源为PhilipsUVA,PhilipsUVB,SUV1000日光模拟器.试验物为2%8-MOP.①豚鼠对8-MOP+UVA(PUVA)和8-MOP+UVB(PUVB)的反应.②豚鼠对8-MOP+UVA(PUVA)和8-MOP+UVA+UVB(PUVA+UVB)的反应.③人体对8-MOP+UVA(PUVA)和8-MOP+UVA+UVB(PUVA+UVB)的反应.结果PUVA组的反应率和单纯UVA照射组有显著差异(P<0.01),PUVB组的反应率和单纯UVB照射组的差异无显著性(P>0.05).PUVA+UVB组试验区域3d皮肤反应评分变化趋势的斜率大于PUVA组.人体试验结果同动物试验结果相一致.结论在以8-MOP为受试物的光斑贴试验中,UVB检测效果较差,而UVA和PUVA+UVB均能检测出8-MOP的光毒性,但UVA+UVB要优于UVA.因而UVA+UVB是一种理想的光斑贴试验光源.
简介:排卵,一般发生在下次月经来潮前14天左右,一月一行者,发生在两次月经中期.期外排卵,是正常排卵期之外发生意外排卵的现象.王淑贞[1]指出:"临床有周期第7天前后性交而怀孕,是性交引起期外排卵,还是精子存活时间延长,尚不清楚."夏桂成[2]也谈到"在不孕症中……月经干净第1天开始连续3天同房,……在无锡某厂试验2人有效."得以怀孕.王淑贞根据这一临床事实推论为"期外排卵".细分析之,期外排卵,有排卵期前排卵和期后排卵两种.王淑贞的推论当为期外排卵中的期前排卵即泡发育早期的意外排卵.用临床实践检验这一理论,完全符合循证医学的内涵,对不孕症的调治和研讨安全期避孕有重要临床意义.笔者自1995年以来,在妇科不孕症的调治中研讨了这一理论.