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（

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简介：摘要：医疗技术在经过不断发展后，带动了DNA检测技术的发展，并广泛的对其进行了应用，成为了法医鉴定检验方式中最主要的一种。法医所检验的DNA其实就是检验DNA在人体内的序列及其长度，进而对个人进行识别或是进行亲子鉴定。该方式是最为重要的法医物证鉴定方式之一。因此本文概述了DNA技术在法医鉴定中的应用，分析了DNA检测技术在法医鉴定中存在的问题，并对能够提高质量和控制水平的措施进行了提出，以此来促进法医鉴定事业在我国的发展。

简介：Inordertoanalyzethesequencesoftheinternaltranscribedspacer(ITS)includingthe5.8SribosomalDNA(rDNA)ofcommondermatophytes,soastoobtainarapidandaccuratemethodtoidentifythespeciesofdermatophytesandtoestablishthephylogenetictreeofthesespeciestounderstandtheirrelationship,16strainsofdermatophyteswerecollectedandpreliminarilyidentifiedbymorphologicalcharacteristics.GeneralprimersforfungiITS1andITS4wereusedtoamplifytheITSrDNAofeachstrainswithPCR.ThePCRproductsafterpurificationweresequenceddirectlyandwereanalyzedthroughinternet.Intheresults,11strainswereidentifiedbymeansofmorphologicalfeatures,amongwhich5strainswereTrichophyton,5strainswereMicrosporumand1wasEpidermaphyton,whichwasconsistentwiththeresultsbymolecularbiology.Inthe5unidentifiablestrains,1strainwasprovedtobeChrysosporiumbymolecularbiology.Thesestrainsstudiedcouldbedividedinto3differentclassesasindicatedintheanalysisofthephylogenetictreeofthesequencesinITS,whichwerequitedifferentfromthoseofmorphologicalclassification.ItisevidentfromtheaboveobservationsthatthemolecularmethodofanalysisontheITSsequencesisarapid,highlysensitiveandaccurateapproachforthedetectionofdematophytespecies,however,itstillexhibitssomelimitationsneedingthesupplementationwithmorphologicalidentification.

简介：【摘要】随着医疗科技的不断发展， DNA甲基化检测方法逐渐增多， DNA甲基化属于遗传外饰物，是遗传学中的重要内容，对于该物质的研究一直是临床中的热点，但采用操作简单，能够有效帮助各界医学专家了解杂种优势以及基因学的秘密。为了临床研究提供准确依据，本文现对 DNA甲基化检测方法的临床研究进展展开综述，详情内容如下：

简介：TostudytheexpressioncharacteristicofJapaneseencephalitisvirus(JEV)prMEandEproteinsandtheefficacyofDNAimmunizationbydifferentrecombinantplasmidscontainingJEVprME(2001bp)andE(1500bp)genes,tworecombinants(pJMEandpJE)containingJEVprMEandEgenesfusedwithFLAGwereconstructedandthentransfectedintoHepG2andCOS-1cellsbylipnsomefusion.TheexpressionfeatureofFLAG-prME(about72kDa)andFLAG-E(about54kDa)proteinsintransfectedcellswereanalyzedbyWesternblotandtwoantibodysystems(anti-FLAGandanti-E).BALB/cmicewereimmunizedwith100μgoftwokindsofrecombinantsbyintramuscularinjection,andJEVJaGAr-01strains(10^5PFU/100μl)weregiventoBALB/cmicebyintraperionealinjection3wkaftertwiceDNAimmunizationbyalethalviruschallenge.BALB/cmicewereobservedfor21daysafterchallenge.80%plaquereductionneutralizationtestwasperformedtotitrateneutralizationantibodybeforeandafterviralchallenge.ItwasfoundthattheexpressionofproteinsassociatedwithpJMEandpJEwasdeterminedintransfectedcellswithanti-FLAGandanewproteinof11kDawasdetectedinHepG2andCOS-1cellstransfectedwithpJME.OnlyE(53kDa)proteinwasidentifiedastransfectedwithpJMEusingantiE.HigherlevelofneutralizationantibodiesandtheefficacyofprotectiveimmunitywereinducedwithpJMEimmunization,andweresimilartothoseinducedbyinactivatedJapaneseencephalitisvaccine,butwerebetterthanthoseinducedwithpJE.ItconcludesthattheexpressionlevelfromprMtoEproteinsofJEVisdifferentinvitro,andtheinvitroexpressionefficiencyofpJMEwasbetterthanthatofpiE.FLAG-prMEproteinexpressedbypJMEcouldbecleavedbypeptidasefromhost.TheefficacyofDNAimmunizationiscorrelatedtotheexpressioncharacterizationofrelatedproteinsexpressedinvitro.

简介：AThepurposeofthisinvestigationwastostudythetherapeuticeffectofLamivudineonHBVDNAinperipheralbloodmononuclearcells(PBMC)andserum,andthelevelofcytokinesinserumofthepatientswithchronichepatitisB.Thepatientsweredividedintotwogroups(A=47,B=34),andtreatedbyLamivudine,routinemedicine,respectively.ThelevelsofHBV-DNAinPBMCandserumandcytokineswerealldetectedbeforeandaftertreatment.AfterthetreatmentofLamivndinefor36weeks,thetotalconversionnegativeratesofHBV-DNAinPBMCandserumofthepatientstreatedwithLamivudinewere55.32%(26/47)and61.70%(29/47),respectively.ThetotalnegativeconversionratesofHBV-DNAinPBMCandserumofthepatientstreatedbyroutinemedicinewere26.47%(9/34)and32.35%(11/34),respectively.TherewassignificantdifferencebetweenLamivudinegroupandroutinemedicinegroup(P<0.01).ThenegativeconversionratesofHBeAginserumofthepatientswere46.81%(22/47)and68.09%(32/47)attheendof24weeksand36weeks,andwerehigherthanthoseofroutinemedicinegroup(P<0.05andP<0.01).Thelevelsofalanineaminotransferase(ALT),aspartateaminotransferase(AST),ALT/ASTinserumofthepatientsafterbeingtreatedbyLamivudine,routinemedicineweredown-regulatedto(30.1±9.6)U/ml,(32.3±10.7)U/ml,0.9±0.1and(48.4±10.7)U/ml,(44.7±11.0)U/ml,1.1±0.2.Aftertheanalysisofvariance,thehighsignificantdifferencewasobviousbetweenthetwogroups(P<0.01).ItwasduetothehighlevelsofIL-6,IL-8andTNF-αinchronichepatitisBwhichcouldbedown-regulatedto(250.5±33.3)pg/ml,(153.4±22.2)pg/ml,(232.6±21.2)pg/mlbyLamivudine,whichwasmoreobviousthanthatofroutinemedicine(P<0.01).LamivudinehashightherapeuticeffectonthetreatmentofHBVDNAinPBMCandserumandhasbettertherapeuticeffectthanthatofroutinetherapy.Lamivudinemayalsohavehigherdown-regulatedinflammatoryinfiltrationandsecretioninlocalsitecaused

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简介：TheaimofthisstudyistoinvestigatethefeasibilityandmechanismofhIL-2-preSDNAvaccineaspreventionandtherapeuticapproachagainstHepatitisB.EukaryonexpressionvectorinvolvinghIL-2andpreSgenewasconstructedwithrecombinanttechniqueandtransferredintonormalBALB/cmiceandHBVtransgenicmice(Tg-Mice)respectively.Tnenaseriesofdetectionwereperformed:detectionofanti-preS2,HBsantibodyandHBsAginBALB/cmiceandTg-micewithELISA,quantificationofHBVDNAcopiesinHBVTg-miceserumwithreal-timePCR,determinationofhepatitisdegreewithimmunopathologicalHEstaininganddetectionofliverfunction.Anti-preS1canbedetectedat4^th,6^thand10^thweekininoculatedBALB/cmice.Injectionwithgenegungainedanadvantageovermuscularandsubcutaneousinjectionsinceitacquiredjust1/10inoculationquantity(10μg/mouse).HighestexpressionofIgG2aat4^thweeksuggestedThl-mediatedimmuneresponse,whichfacilitatedHBVcleaning.OfallinoculatedHBVTg-mice,80%ofthemshowedanfi-preS2,HBsantibodypositiveandHBVDNAdecreased,and20%showednegativeforHBsAg.HEstainingtohepatictissueshowedobviousinfiltrationofinflammatorycells,swellingandgranulardegenerationofhepatocytes.Inourstudy,IL-2-preSDNAvaccinewhichcanprovokethehumoralandcellularimmuneresponseandbreaktheimmunetolerancesupportsthedesignationandconstructionofnewvaccineagainstHBVandspecificimmuneremedyforHBVcontinuousinfection.

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简介：【摘要】目的：讨论乙肝病毒性肝炎患者临床医学检验应用探究。方法：选取我院治疗的乙肝病毒性肝炎的患者50例，均实行两对半和HBV-DNA定量检测，回顾性分析检测结果，选取的患者均需要使用两对半临床医学检验，采集患者的清晨空腹状态下静脉血4毫升，将血液放入离心机中，使用每分钟3000转，10分钟后，将血清分离出来，放在4摄氏度的条件下保存。结果：所有患者经临床检测诊断结果均为乙肝病毒性肝炎，其中小三阳患者占18例（36.0%），大三阳患者占13例（26.0%），其它类型占19例（38.0%），三组之间的差异性较为显著（P

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简介：ThepurposeofthisstudywastoconstructaneukaryoticDNAvectorencodingamultipleepitopeantigen(MFC)ofhepatitisCvirus(HCV)andahepatitisBsurfaceantigen(HBsAg),andexploretheeffectofHBsAggeneontheimmunityofHCVmultiple-epitopeDNAconstructinvitroandinvivoinmice.AnHCVDNAvector(pVAX1-HBs-MFC)wasconstructedbyfusingHBsAggenetotheNterminalofanHCVmultiple-epitopeantigengene.ThepVAX1-HBs-MFCwastransfectedintoHEK293TcellsanditsexpressionwasmeasuredbyELISAandWesternblotting.BALB/cmicewereintramuscularlyimmunizedwiththepVAX1-HBs-MFC,andanELISAapproachwasappliedtodeterminethespecificantibodytitersandsubtypesinthemouseserum.Thecross-reactivityoftheantibodieswasalsocheckedwithtwosynthesizedHCVhypervariableregion1(HVR1)peptides.TheIFN-γproductionandcellproliferationofthemousespleencellswereevaluatedbyELISAandMTS(3-[4,5-dimethylthiazol-2-yl]-5-[3-carboxymethoxyphenyl]-2-[4-sulfophenyl]-2H-tetrazolium,innersalt)assays,respectively.TheexpressionofpVAX1-HBs-MFCwasdetectableinthetransfectedHEK293Tcells.TheserumantibodyresponsewaseffectivelyelicitedinBALB/cmiceinjectedwithpVAX1-HBs-MFC.ThehighesttiterofantibodyagainstHCV(MFC)was1:1280,andtheratioofIgG2a/IgG1was1.50±0.12atthefifthweekafterfirstimmunization.Moreover,thecollectedmouseserumantibodyhadtheabilitytocross-reactwiththetwosynthesizedHCVHVR1peptides.ThestimulationindexofthemousesplenocytestoMFCwas1.79±0.07,andtheIFN-γlevelwas287±6pg/mlatweek21afterfirstimmunization.ThehighesttiteroftheantibodyincontrolBALB/cmiceimmunizedwithpVAX1-MFCwas1:320,andtheratioofIgG2a/IgG1was1.33±0.11atweek5post-immunization.Furthermore,thestimulationindexofthemousesplenocytescellstoMFCwas1.52+0.06,andtheIFN-γlevelwas225±9.3pg/mlatweek21post-immunization.TheHBsAggenecanenhancetheeffectsofanHCVmultiple-epitope

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简介：【摘要】目的：于急性脑梗死患者的静脉溶栓中阿替普酶的应用效果进行评估。方法：对2019年2月至2020年2月来我院就诊的60例患者进行分组（双盲法）研究，乙组和甲组，各30例。乙组以常规治疗为主，甲组在乙组基础上加阿替普酶静脉溶栓治疗，比较神经功能缺损程度、疗效、凝血功能、炎症因子。结果：实施不同治疗后，甲组神经功能缺损程度评分小于乙组（P＜0.05）；甲组治疗总有效率大于乙组（P＜0.05）；甲组活化部分凝血酶时间、凝血酶时间、凝血酶原时间都优于乙组（P＜0.05）；甲组肿瘤坏死因子α、白介素6都优于乙组（P＜0.05）。结论：于急性脑梗死患者中，实施阿替普酶静脉溶栓可得到确切的疗效，可明显改善患者的神经功能缺损程度、炎症因子水平、凝血功能。

简介：【摘 要】目的：研究血管紧张素转换酶抑制药运用于冠心病中的临床治疗效果。方法：选择我院在 2018年 12月 -2019年 12月间收治患有冠心病的 110例患者作为研究对象，将其分为两个不同的研究小组，分别为试验组与对照组，对照组给予常规治疗法，试验组在此基础上给予血管紧张素转换酶抑制药，对两组患者的临床治疗情况进行观察。结果：对比试验组与对照组患者治疗效果，试验组治疗总有效率为 98.18%（ 54/55），对照组治疗总有效率为 87.27%（ 48/55），差异性大，统计学有对比意义 P＜ 0.05。结论：血管紧张素转换酶抑制药运用于冠心病中可以缓解患者的临床症状，帮助修复血管内皮，值得临床推广使用。

简介：【摘要】目的 ： 探讨孕产妇 α -L- 岩藻糖苷酶的变化及意义。 方法 ： 选取我院 2019 年 60 例患者为研究对象，均分成两组，为孕产妇组和非孕产妇组。入院时为每个患者测量 α -L- 岩藻糖苷酶含量， 24 周后再为每位患者测量一次，对比两组患者在入院前后 α -L- 岩藻糖苷酶含量的变化。 结果 ： 在 24 周后，孕产妇组的 α -L- 岩藻糖苷酶含量 变化 过多，而非孕产妇的 α -L- 岩藻糖苷酶含量 变化 较少。 结论 ： 孕妇在做检查时，应先检查 α -L- 岩藻糖苷酶含量变化，再决定是否患有肝病。

简介：【摘 要】目的：研究血管紧张素转换酶抑制药运用于冠心病中的临床治疗效果。方法：选择我院在 2018年 12月 -2019年 12月间收治患有冠心病的 110例患者作为研究对象，将其分为两个不同的研究小组，分别为试验组与对照组，对照组给予常规治疗法，试验组在此基础上给予血管紧张素转换酶抑制药，对两组患者的临床治疗情况进行观察。结果：对比试验组与对照组患者治疗效果，试验组治疗总有效率为 98.18%（ 54/55），对照组治疗总有效率为 87.27%（ 48/55），差异性大，统计学有对比意义 P＜ 0.05。结论：血管紧张素转换酶抑制药运用于冠心病中可以缓解患者的临床症状，帮助修复血管内皮，值得临床推广使用。

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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.