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:目的探讨端粒酶RNA(hTR)和反转录酶(hTERT)在银屑病皮损中的表达情况以及它们与角质形成细胞增殖关系。方法应用原位杂交方法检测银屑病皮损hTR、hTERTmRNA的表达,应用免疫组织化学方法检测Kj-67抗原表达,并对hTR、hTERTmRNA的表达与Ki-67抗原表达进行相关性分析。结果hTR表达在基底细胞、棘细胞、颗粒层细胞和所有有核细胞的胞浆,与细胞的增殖情况无关;其表达强度和阳性细胞百分率各组之间无明显差异(P〉0.05)。而hTERT的表达与细胞增殖状态有关,主要表达在基底细胞层和棘细胞层下方,表达强度和阳性细胞百分率要明显高于正常皮肤(P〈0.05)。Ki-67抗原主要表达在细胞生发层和分裂旺盛的组织;它的表达与hTERT的表达呈正相关(r=0.674,P〈0.01);而与hTR(r=-0.295,P〉0.05)无关。结论hTERTmRNA在银屑病皮损中的表达明显升高,与细胞增殖活性有关。hTR的表达和细胞增殖活性无关。
简介:目的:筛选出对孢子丝菌结合效率相对较高的探针。方法以50株纯培养的孢子丝菌及标准株为样本,以毛霉、烟曲霉、念珠菌各1株为阴性对照,用聚合酶链反应-酶联免疫法(PCR-ELISA)对已报道的5个孢子丝菌特异性探针(U26852、U26866、U26866′、M85053及AF117945)进行筛选。记录各探针与合成DNA片段杂交底物显色与否及酶免疫测定指数(EI)值。结果PCR产物测序证实5个探针均位于产物序列上;在相同的ELISA条件下,探针U26852显色最强,EI值最高。结论针对28SrRNA的探针U26852是目前与孢子丝菌结合效率相对较高的探针。
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:目的与细胞培养和LCR比较考察6种国产PCR试剂盒在检测性传播疾病门诊患者标本沙眼衣原体的诊断价值。方法在北京、上海、南京、天津5家临床医院性传播疾病门诊收集到673份尿道/宫颈拭子标本,分别进行沙眼衣原体培养和PCR检测,对结果不相符合的标本采用连接酶链反应(LCR)复检,比较分析检测结果。结果合格病例616例,36份培养法检测阳性6.3%,PCR检测阳性率分别为23.5%-28.7%。与培养结果比较,各种PCR检测的敏感性均在90%以上。LCR复核标本200份,与之相比,PCR检测的敏感性为83.9%-98.6%,特异性66.7%-94.7%,YI指数0.523-0.881。其中PCR2结果符合性最好(YI指数0.881)。综合分析发现国产PCR技术检测沙眼衣原体的敏感性均在85%以上,特异性均在95%以上。结论国产PCR技术检测尿道/宫颈拭子沙眼衣原体具有较高的敏感性与特异性,可以用于临床检验,实验率质控与监督是本方法得以正确应用的关键。
简介:目的:研究45例急性荨麻疹住院患者心肌酶的变化及与超敏C反应蛋白(hsCRP)、血细胞沉降率(ESR)、降钙素原(PCT)和血常规的相关性。方法:回顾性分析45例急性荨麻疹住院患者心肌酶谱包括肌酸激酶(CK)、肌酸激酶同工酶(CK-MB)、肌红蛋白(MB)、乳酸脱氢酶(LDH)以及hsCRP、ESR、PCT和血常规的水平,并与健康对照组的相应指标进行比较,分析患者心肌酶水平与hsCRP、ESR、PCT和血常规的相关性。结果:患者组45例中有32例(71.1%)心肌酶指标升高,其中患者组CK、CK-MB、LDH水平均较健康对照组明显升高(t=2.71、4.97、7.37,P值均〈0.01);患者组LDH分别与hsCRP、ESR、PCT、白细胞、中性粒细胞呈正相关(r值分别为0.60、0.48、0.40、0.36、0.57,P值均〈0.05),CK-MB水平与hsCRP、ESR、PCT、WBC呈正相关(r值分别为0.33、0.73、0.59、0.68,P值均〈0.05);CK与ESR、PCT、白细胞、中性粒细胞正相关(r值分别为0.53、0.42、0.55、0.31,P值均〈0.05)。结论:症状较重的急性荨麻疹患者常伴有心肌酶指标异常,且与体内炎症指标存在相关性。
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。