简介:散发病例报道:作为斑贴试验制品赋形剂的白凡士林可导致接触性变态反应。此现象的定量关联性仍需进一步阐明。方法:对1992-2004年间皮肤科信息网的斑贴试验资料(IVDK,http://www.ivdk.org)进行回顾性分析。结果:分析79365例用纯凡士林做斑贴试验的病例,27例为“+”(0.03%)反应,2例为“+++”(0.003%)反应。多数非阴性反应(0.3%)结果为可疑(235)或轻度刺激(32)。阴性反应指数(RI)(-0.8),高阳性率(PR)(93%)与斑贴试验制品中包含99%以上的凡士林之间缺乏一致性,这表明多数“阳性”(+)反应实为刺激性。共有2例“+++”反应。1例被证实为“愤怒背一兴奋性皮肤综合征”。另1例可能为读取或文件编写错误,因为多数此病例的含凡士林制品的斑贴试验结果为阴性。结论:真正对白凡士林过敏的斑贴试验反应罕见,也许与个体对变态原的敏感性增加和(或)刺激性有关。这与凡士林作为致敏剂的作用一致。
简介:ChinesepopulationsinfectedwithHIV-1.Methods:GenomeDNAfromperipheralbloodmononuclearcells(PBMCs)of78HIV-1infectorswasamplifiedbypolymerasechainreaction(PCR).CCR5,CCR2bandSDF1genefragmentswereobtainedfromrestrictivefragmentlengthpolymorphism(RFLP)and/orCCR△32,CCR5m303,CCR2b-64IandSDF1-3'Aallelicgenes'mutationalfrequenciesweresequenceddirectlyfromPCRproducts.Results:NoneofCCR5△32,CCR5m303genemutationwerefoundin78subjectswithHIV-1infection.TheallelicgenemutationfrequenciesofCCR2b-64IandSDF1-3'Acorrespondingto14.9-34.0%and17.6-38.2%of95%CI,were22.79%and26.92%respectively.TheircolonydistributionconformedtotheHardy-Weinbergequilibrium.Conclusion:TheHIV-1infectionsfoundatpresentareallsusceptiblepopulationofCCR5△32andCCR5m303.ThepolymorphismandfrequenciesofCCR5△32,CCR5m303,CCR2b-64IandSDF1-3'AallelesfromChineseHIV-1infectedpopulationweredisclosedinthisstudyforthefirsttime,whichisofsignificanceforstudyingthegeneticresistancetosusceptibilitytoHIV-1infectionaswellasAIDSdiseaseprogression.
简介:Objective:TodirectionallyclonetheomplgenefromChlamydiatrachomatis(Ct)FGenotypeontoaplasmidvectorforconstructingarudimentaryDNAvaccine.Methods:ThecompleteomplgenefromgenomicDNAofCtFgenotypewildspecieswasamplifiedwithprimersdesignedbycomputer.Therecombinantgenewasobtainedbyrestrictionenzymecutting,linkingthegenewiththeplasmidvectorinvitro,transformingtherecombinantgeneintobacteria,andextractingtheDNAfromthebacteria.Results:DNAextractingfromthebacteriawascomposedoftheimplgeneandplasmid,whichisidentifiedbythreemethodsofsingularrestrictiveenzymecutting,doublerestrictiveenzymecuttingandPCR.Conclusion:CloningoftheomplgenefromtheCtFgenotypemeansthatarudimentaryDNAvaccinewassuccessfullyconstructed.
简介:Objective:Toobservetheeffectivenessofhighlyactiveantiretrovirustherapy(HAART)onHIV/AIDSpatients.Methods:UsingHIV-Iquantitativemethodsandimmunologicalfunctioninspection,wemonitored4HIV/AIDSpatientswhoweresufferingfromimmunologicaldeficiencyandweretreatedwithHAART.Results:ThereproductionofHIVinall4patientswasefficientlycontrolledatthe4thweekofthetreatment.Theaverageviralloaddecreasedby1.99Log/ml(0.73-2.46Log/ml).ThenumberofCO+4andCD+sshowedasteadycontinuousincrease4to12weeksafterthetreatment,withanincreaseof67.2%and103.0%respectively.CorrelativestudyamongdifferentvariablesafterthetreatmentrevealedthatpositivecorrelationexistedbetweenthenumberofCD+4andCD+3aswellasCD+8,whilenegativecorrelationexistedbetweenthenumberofCD+4andplasmaviralload.Conclusion:HIV-Iquantitativemethod(plasmaviralload)andthenumberofCD+4inperipheralbloodcanbeusedasimportantreferenceindicatorsinevaluatingHAART.
简介:背景:最近的研究表明氧化应激可能参与了慢性特发性荨麻疹(CIU)的发病机制。已经证实地氯雷他定在体外有抗氧化活性。作者评估地氯雷他定对CIU患者氧化应激指标的效应。方法:采集10例CIU患者服用地氯雷他定前和服药4周后的血标本,并采集10名健康志愿者血标本作为对照。采用氧化二氯荧光素荧光分光光度法检测患者和对照组样本血小板中的氧化应激(ROS)产物,采用黄嘌呤一黄嘌呤氧化酶系统检测超氧化物歧化酶(SOD)活性。结果:与对照样本相比,CIU患者基线时的ROS浓度及SOD活性显著升高,经地氯雷他定治疗后患者血标本中的ROS水平及SOD活性有所下降(P〈0.005)。结论:这些初步结论表明地氯雷他定在体内也有抗氧化作用。