简介:Objective:Todetectandquantitategenitalherpessimplexvirus(HSV)DNAinspecimensfrom100patientsclinicallydiagnosedwithgenitalherpes.Methods:PolymeraseChainReaction(PCR)andenzyme-linkedimmunosorbentassay(ELISA)wereusedwithastandardcurveofDNAcopiesofHSVasquantitativecontrast.Results:Ninety-threecaseswereconfirmedHSVpositiveand7caseswerefoundtobenegative.Therewere58casesofHSV-2(62.4%)and35casesofHSV-1(37.6%)amongthe93positivecases.ThenumberofDNAplasmidsrangedfrom115to1.1×l0^5per250pLamongthe93positivesamples(mean=7.1×10^4/250μL).ThenumberofHSVDNAplasmidsrangedfrom136to1.1×l0^5copiesper250pL(mean=7.6×10^4)amongthosewithHSV-2,and115to9.4×10^4per250pL(mean=6.3×10^4)amongthosewithHSV-1.Meanwhile10μLofextractedanddissolvedDNArandomlytakenfrom8eachofHSV-2andHSV-1samplesweretested.ThenumberofHSV-2DNAplasmidsrangedfrom35copiesto2.7×10^4(Mean=l.8×10^4)andthenumberofHSV-1DNArangedfrom29to2.5×10^4(Mean=1.6×10^4).Inthe7negativecases,thequantityofHSVplasmidswaszero.Conclusion:ThesensitivityofELISAquantitation(93%)isequaltothatofSouthernblot.ThesensitivityofPCRfordiagnosisis91%,and88%forPCRtyping.
简介:Objective:ToexploretherelationshipbetweenquantitativeTreponemapallidumDNA(TP-DNA)PCRtestingandtheToludineRedUnheatedSerumTest(TRUST)inpatientswithsyphilisbeforeandaftertreatment,andevaluatetheclinicalvalueofquantitativeTP-DNAtestinginthediagnosisandtreatmentevaluationofsyphilis.Methods:29patientswithprimary(12cases)orsecondary(17cases)syphilis,whometthecriteriasetforthisstudywererecruitedassubjects.Allpatientsweretreatedwith2.4millionunitsbenzathinepenicillinIMweeklyfor3weeks.QuantitativetestsofTP-DNAinthepatients'plasmawereperformedusingFQ-PCRbeforeandafterthetreatment.SerologictestsincludingTRUSTandTPPAwerealsoperformed.Results:Beforethetreatment,9outof12primarysyphilispatients(75%)andallsecondarysyphilispatients(17/17)testedpositiveforTreponemapallidum(TP)byTP-DNAtesting.TheaveragequantitativetestvaluesofTP-DNAinprimaryandsecondarysyphilispatientswere(3.38±2.34)×10^4and(5.73±1.33)×10^6copies/ml,respectively.Afterthreemonthsoftreatment,1ofthe9primaryand5outof17secondarysyphilispatientswerepositiveuponTP-DNAtesting,respectively.TheaveragequantitiesofTP-DNAwere2.01×10^2copies/mlinprimaryand5.87×10^2copies/mlinsecondarysyphilispatientswithpositiveTRUSTandTP-DNAtests,and3.09×10^2copies/mlforthosewithnegativeTRUST,respectively.Afterninemonthsoftreatment,alltheprimaryandsecondarysyphilispatientswerenegativeuponTP-DNAtesting,whileallprimaryand14of17(82.35%)secondarysyphilispatientsshowednegativeTRUSTresults.Conclusion:ThattheresultsofTP-DNAtestsarenotconsistentwiththoseofTRUSTbeforeandaftertreatmentindicatesthatquantitativeTP-DNAtestingmayhavevaluableclinicalsignificanceintheearlydiagnosisandevaluationoftreatmentregimensforsyphilis.
简介:Objectives:Todevelopamulti-nestedpolymerasechainreactioninanassaytodetectearlyTreponemapallidumandHaemophilusducreyiDNAintheswabsofgenitalulcers.Methods:Fourpairsofouterandinnerprimers,specifictothebasicmembraneproteingeneofTreponemapallidumandtothe16srRNAgeneofHducreyiweresynthesized.Themulti-nestedPCRwasdevelopedandappliedtodetectTreponemapallidumandHaemophilusdicreyiinclinicalswabs.Result:ThetwosamplesofstandardstrainsofHaemophilusducreyiandoneTreponemapallidumwereamplifiedandshowed309-bprRNAgeneofHaemophilusducreyiand506-bpDNAofTreponemapalidum,respectively.Outof51samplesofgenitalulcerdetected,29showedTreponemapallidumpositiveproductandnoHaemophilusducreyiDNAwasfound.Conclusion:Themulti-nestedPCRforTreponemapallidumandHaemophilusducreyicouldbeusefulforearlydetectionanddistinguishingdiagnosisbetweensyphilisandchancroid.
简介:Objective:Todevelopasensitive,specificandsimplemethodfordetectionofextremelylownumbersofT.palliduminclinicalspecimens,asasignificantadditiontotheserologictestsforsyphilisdiagnosis.Methods:Double-tubenestedPCR(DN-PCR)andsingle-tubenestedPCR(SN-PCR)assayswereperformedtoamplifyspecificfragmentsoftheDNApolymeraseIgene(polA)ofT.pallidum.SensitivityandspecificityofthetwoPCRassaysweretested.EightysixwholebloodspecimensfrompersonswithsuspectedsyphilisweredetectedbythetwonestedPCRmethods.TheTPPAtestwasusedasacomparisonfordetectingsyphilisinserafromcorrespondingpatients.Results:OnlyspecificampliconscouldbeobtainedduringamplificationoftheT.pallidumpolAgeneandthedetectionlimitwasapproximately1organismwhenanalyzedongelbythetwoPCRmethods.Of86clinicalspecimens,62werepositivebyTPPA.Ofthese,54and51werepositivebytheDN-PCRandSN-PCR,respectively,whichdoesnotrepresentastatisticallysignificantdifferencebetweenthetwoPCRtests.Of24TPPA-negativespecimens,5werepositivebybothDN-PCRassayandSN-PCRassay.Conclusion:TheSN-polAPCRmethodisextremelysensitive,specificandeasytoperformfordetectinglownumbersofT.palliduminclinicalbloodspecimensasacomplementarytoserologyforsyphilisdiagnosis.
简介:目的:检查无精子、严重少精子患者的染色体异常和Y染色体上无精子基因(AZF)微缺失的遗传缺陷。方法:应用外周血培养和聚合酶链反应(PCR)技术,对220例无精子、严重少精子患者的染色体和11个AZF基因位点进行检查。结果:在140例无精子患者中,发现19例患者染色体异常,异常率为13.57%。有21例患者有AZF基缺失,总缺失率为20.31%,AZFa、AZFb、AZFc缺失率分别为2.38%、4.76%、16.67%。在80例严重少精子患者中,有14例患者有AZF基因缺失,总缺失率为17.50%,AZFb和AZFc的基因片段缺失率分别为1.25%和17.50%。未发现有染色体异常和AZFa缺失。结论:染色体异常和无精子基因微缺失是导致无精子症、少精子症主要因素,遗传学检查对男性不育患者的病因诊断与治疗有着重要价值。
简介:目的:探讨男性不育症患者精子DNA完整性与精子常规参数及形态的相关性。方法:纳入2016年1月至12月于我院就诊的男性不育症患者72例为观察组,同期体检健康男性100例为对照组。采用WLJY-9000型彩色精子质量检测系统检测精液常规参数及精子形态学参数,采用精子染色质扩散法(SCD)分析精子DNA完整性。对比观察组与对照组各检测指标差异。将观察组进一步划分为少精症组(n=16)、弱精症组(n=33)、白细胞精子症组(n=23),对比各小组检测指标的差异。分析观察组中精子DNA完整性与其它指标的相关性。结果:观察组精子浓度、精子存活率、前向运动精子占比、正常形态精子占比、精子DNA完整性均明显低于对照组,差异有统计学意义(P〈0.05)。少精症组精子浓度最低,弱精症组精子存活率最低,白细胞精子症组前向运动精子占比及正常形态精子占比最低,上述差异均有统计学意义(P〈0.05)。观察组精子DNA完整性与精子浓度、精子存活率、前向运动精子占比、正常形态精子占比均呈正相关(r=0.398、0.304、0.662、0.404,P均〈0.01)。结论:不孕症男性精子DNA完整性、精子浓度、精子存活率、前向运动精子占比、正常形态精子占比均明显下降,且精子DNA完整性与后4项观察指标均呈明显正相关。
简介:背景:英夫利昔单抗,一种直接针对肿瘤坏死因子-α的鼠-人嵌合单克隆抗体,已证实对中重度银屑病有效,但尚无公开发表的资料提及其在治疗难治性银屑病及与其他抗银屑病联合治疗的情况。目的:报道作者以英夫利昔单抗治疗参加三级转诊服务的严重难治性患者的经验。方法:所有在2002年至2005年7月间用英夫利昔单抗治疗的、参加三级转诊服务的严重银屑病患者均纳入该项前瞻性、开放标记研究。用疾病严重性评分[银屑病面积与严重性指数(PASI)、皮肤病生活质量指数和临床图片]详细记录整个治疗期间治疗初、第2周、第6周、间隔2个月时的有关疾病的表型、临床过程和不良事件的情况。结果:整个研究中共23例患者给予英夫利昔单抗治疗。1例患者因患脓疱型银屑病退出研究。患者均为重度银屑病(基线PASI26.5±6.7,x±s,n=22),并且既往曾接受至少两种系统性治疗;16例患者在治疗初期接受一种或一种以上联合治疗。在第10周,95%患者获得基线PASI50%或更大的改善(PASI50),且77%患者获得75%或更大的改善(PASI75)。有效性持续了较长一段时间,10例治疗时间超过11个月的患者中有8例维持至少PASI50。仅1例患者由于缺乏疗效而退出,2例患者出现严重系统性感染包括肺外结核(脾脓肿)和蜂窝织炎,6例患者由于不良反应包括输液反应(2例)、严重血小板减少症(1例)、肝炎(1例)和恶性肿瘤(2例)而终止治疗。结论:来自该开放标记研究的数据提示英夫利昔单抗可快速、有效治疗严重、难治性银屑病,尽管约25%患者由于出现严重不良反应而中止治疗。尚需进行长期随访、持续的药物监督和进一步对照研究,以期完整评价英夫利昔单抗在上述难治人群中的风险。