简介：【摘 要】目的：讨论聚合酶链反应检测HBV感染患者血清HBVDNA的临床价值。方法：选择103例不同HBV感染患者，对患者的血清HBVDNA进行聚合酶链反应检测。结果：慢性乙肝，乙肝后肝硬变，原发性肝癌中HBV DNA定量的阳性发生率，含量高于急性乙肝，差异较大（

简介：【 摘 要 】 目的： 讨论 PCR 产物酶联免疫检测法在乳腺癌临床检验中的应用价值评估。 方法 ： 选取我院治疗的乳腺癌的患者 50 例，均对患者使用 PCR 产物酶联免疫检测法检测，使用手术治疗，在手术后进行病理检测，以病理检测的结果为金标准。 结果 ： PCR 产物酶联免疫检测 与手术病理检测结果相比，差别较小 （

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简介：摘要：目的：分析PCR检验法在阴道炎患者细菌检验中的应用效果。方法：选取某院收治的阴道炎患者患者100例。将所选患者随机分为两组，普通组和对比组。普通组患者选择PCR检测法，对比组患者用细菌培养法。结果：普通组的阳性检出率和加特纳菌检出率分别为88.0%、70.00%，对比组为64.00%和34.00%。结论：PCR检测法的阳性检出率和加特纳菌检出率均显著高于细菌培养法，应在临床中推广使用。

简介：ToestablisharapididentificationmethodforcommonpathogenicbacteriaonthebasisofmolecularbiologyandtoconstructapreliminaryPolymeraseChainReaction-CapillaryElectrophoresis-RestrictionFragmentLengthPolymorphism(PCR-CE-RFLP)databaseofbacteriaisolatedfromclinicalspecimensfrequently,183strainscollectedfromclinicalsamplesbelongingto12generaand19specieswhosebiochemicalcharacterizationscorrespondedtothetypicaloneswereexamined.ThegenomicDNAswereamplifiedbytwopairsoffluorescencelabeledprimersaimingat16SrRNAgeneand16S-23SrRNAspacerregiongenerespectivelyatthesametime.PCRproductswerethendigestedbyrestrictionendonucleaseHaeⅢin-completelybeforetakingcapillaryelectrophoresis.TheresultswiththePCR-CE-RFLPpatternsof16SrRNAgeneswerejustalikewithinsomegenera,butwhenitcomesto16S-23SrRNAspacerregiongenes,eachbacteriumshowedauniquepattern,whichcanbedistinguishedfromeachothereasily.ItseemsthatPCR-CE-RFLPpatternsof16SrRNAgenecouldonlybeusedtoclassifythebacteriaintofamilylevel,whereasthedataof16S-23SrRNAspacerregiongenecouldbeutilizedtoidentifythewholemicroorganismsaspreciselyasthespecieslevel.Inspiteofthedataofthespacerregiongenealonecanbesufficientlytoverifythewholebacteria,weinsistthatthe16SrRNAgenecouldbeofsomeassistantincasethatthereshouldbelotsoffamiliesofbacteria,inwhichsomesimilarones,withthesameRFLPdataof16S-23SrRNAspacerregiongene,maycoexist.ThisstudyprovesthattheutilityofPCR-CE-RFLPisaconvenient,rapidmethodtoidentifypathogenicbacteria,andisalsoaquickdiagnosismeasureforapplicationtoclinicaluse.

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简介：【摘要】目的：分析荧光定量RT-PCR在流感病毒检测上的应用价值。方法：对23例确诊感染乙型流感病毒的咽拭子、相关机构提供的甲型流感病毒及乙型流感病毒进行检测分析，使用荧光定量RT-PCR检测，分析临床应用的价值及检测的准确率。结果：荧光定量RT-PCR检测乙型流感病毒呈阳性，且结果与其他病毒未见交叉情况。荧光定量RT-PCR检测不同浓度乙型流感病毒敏感度较高，检测的准确率是86.96%（20/23）。结论：荧光定量RT-PCR检测流感病毒的敏感度、准确性较高，可以作为疾病筛查的依据，建议推广应用。

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简介：[ 摘要 ] 目的： 分析儿童肺泡灌洗液 RT-PCR 检测对支原体感染的辅助诊断价值。 方法： 选取我院儿科收治感染肺炎支原体的患儿进行研究分析。 结果： 研究可知， MP-lgM 阳性率和 MP-DNA 阳性率明指标对比具有差异则表示实验有价值， P 〈 0.05 具有统计学意义。 结论： 为支原体感染肺炎患儿采用 RT-PCR 进行肺泡灌洗液 MP-DNA 拷贝量监测，能够快速为患儿进行确诊，评估患者的病情状况，为患者的治疗提供依据。

简介：Thepurposeofthestudyistoestablishafluorescencequantitativereversetranscriptionpoly-merasechainresponse(FQ-RT-PCR)methodforthequantitativedeterminationofIL-2mRNAandIL-4mRNAinThcells,withwhichtheThcellsstatusofthepatientswithgynaecologicaltumorsandchronicrenalfailure(CRF)canbeanalyzed.IL-2cDNAandIL-4cDNAwereprepared,andtheplasmidpMD18carryingIL-2cDNAorIL-4cDNAfragmentwasconstructedandclonedasthetemplateforquantitativedetermination.Theprimersandprobeslabelledwith6-carboxy-fluorescein(FAM)and6-carboxy-tetrarnethylrhodamine(TAMRA)wereprepared,andtheexperimentalconditionswereoptimizedtosetuptheFQ-RT-PCRmethodforquantitativedeterminationofIL-2mRNAandEL-4mRNA.Thcellsenrichedfromperipheralbloodmononuclearcells(PBMCs)of20healthyvolunteers(HVs),16gynaecologicalbenign(GB)cases,18gynaecologicalmalignant(GM)tumorcasesand16chronicrenalfailure(CRF)patientsweretestedforIL-2mRNAandIL-4mRNAbyFQ-RT-PCR.Thehouse-keepinggeneβ-actinwasusedastheinternalcontrolgeneoftheexperiment.Thestandardcurveforlogconcentrationofseriesofquantitativetemplatesvsthresholdcycle(CT)wasestablishedbylinearregression,andthelinearrangewas102-107copies/μl.TheimprecisiontestshowedtheCVofinter-assayandintra-assayofahighcontentsamplebyFQ-RT-PCRwere7.8%and12.5%,respectively.TheCVofinter-assayandintra-assayofalowcontentsamplewere10.8%and19.5%,respectively.TheIL-2mRNAexpressionsinThofthepatientswithgynaecologicalmalignanttumor(comparedwiththeHVsandthepatientswithgynaecologicalbenigndisease)andinThoftheCRFpatients(comparedwiththeHVs)weredeclinedsignificantlyandatthesametimetheIL-4mRNAexpressionincreasedsignificantly(P<0.001).Asimple,sensitiveandaccurateFQ-RT-PCRmethodforthequantitativedetectionofIL-2mRNAandIL-4mRNAhasbeenestablished.TheIL-2mRNAandIL-4m

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简介：Theaimofthisstudywastoanalyzethepointmutationoftheexon1atcodon54ofthemannose(ormannan)-bindinglectin(MBL)geneinhealthyindividualsofChineseHansandMongolianpopulation,andtofindoutanyassociationbetweentheplasmalevelsofMBLandthegenemutationfrequencyinbethgroupsofindividuals.Bloodsampleswerecollectedrandomlyfrom56healthyindividualsofChineseHansand37Mongolian.ThedetectionofthepointmutationsoftheMBLgenewasperformedbypolymerasechainreaction-restrictionfragmentlengthpolymorphism(PCR-RFLP)anddetectionsforplasmalevelsofMBLweredeterminedbyusingMBLELISAkits.AMBLPCRmethodofassaywasestablishedwithhighspecificity,andgoodreproducibility.ByoptimizingthePCRcondition,theoptimalannealingtemperaturewas55℃,andthelowestdetec-tionlimitwas160pg.Nobandswerefoundinnon-specificitysamples(HAV,HBV,HCVandTB),andthesequencesofPCRproductswerethesameastheexpectedones.AlsoaMBLPCR-RFIPwasestablished.Uponelectrophoresisofthedigestedproductsin3%agarosegel,therewere3patterns:inwhich2bandscorrespondtomoleculeweight232bpand93bp;1band,correspondstomoleculeweight325bpand3bandscorrespondtomoleculeweight325bp,232bpand93bp,respectively.Threebandsof325bp,232bpand93bpofpointmutationswerefoundatcedon54ofMBLcedinggene.FrequenciesinhealthyHanandMongolianpopulationwere0.2321and0.1757respectively.TheaverageplasmaMBLconcentrationwas1998.750μg/L,withSDof1505.152in56healthyHanpopulationand2525.676μg/L,withSDof1955.188in37Mongolian.AnegativecorrelationbetweenMBLconcentrationandgenemutationfrequencywasfoundinhealthyHanpopulation.Frequencyofpointmutationwas1.00whentheMBLconcentrationswerebelow100μg/L;frequencyofpointmutationwas0.4524whentheconcentrationwas100μg/Lto1000μg/L;andthefrequencyofpointmutationwas0.0156whentheconcentrationwaso

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简介：TherRNAgeneticlocusisfoundinallprokaryoticorganisms,andishighlyconservative,althoughitsrelativelystablevariationsarefoundfrequentlyindifferentbacteria.Theutilityofthislocusasataxonomicandphylogenetictoolhasbeenreportedwidely.Thisstudy,aimedat16SrRNAgene(16SrDNA)andwiththehelpofbiomolecularmethods,attemptedtoachievethegoalofrapididentificationofcommonpathogensInthisstudy,333clinicalisolatedpathogenicbacteriawerecollected。TwopairsofprimerswerechosenandlabeledwithdifferentfluorescentdyesandthenusedtoamplifythegenomicDNAextractedfrombacteria.ThePCRproductswerethendetectedbycapillaryelectrophoresis-singlestrandconformationpolymorphism(CE-SSCP).Inordertopursuehigherresolutionandpeak-separationeffect,ahighefficientseparatingmedium,linerpolyacrylamidedel(LPA),wasputtouseinthisstudy.Finally,everybacteriacolonygenerateddistinctpatternsfromeachother,whichwereeasilytobeusedforidentification.TheseresultsindicatedthatPCR-CE-SSCPwasarapididentificationmethodforbacterialidentification,withtheaspectsofhighefficiencyandhighprecision.Comparedwithtraditionalmethod,thistechnologyisofgreatutilityforclinicaluseespeciallyforitshighsensitivity.

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