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171 个结果
  • 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.

  • 标签: 疫苗接种 乙型肝炎病毒 病毒感染 hIL-2-preS DNA 小鼠
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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。

  • 标签: 法医DNA检验 问题 尽量控制
  • 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.

  • 标签: 同源性 核醣体 脚癣 ITS序列 脚气
  • 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:

  • 标签: DNA 甲基化 检测方法 综述
  • 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.

  • 标签: 日本脑炎病毒 prME E蛋白 基因编码 基因重组构建 DNA免疫试验
  • 简介:【摘要】 目的: 探讨保妇康栓治疗宫颈炎合并 HPV 感染 患者 的 效果 。 方法: 选择我院 妇 科于 2018 年 9 月 -2019 年 9 月收治的 宫颈炎合并 HPV 感染 患者 76 例作为研究对象, 采用 随机 数字表法 分为对照组( 36 例,采用 重组人干扰素 α-2b 治疗 ), 观察 组( 40 例, 在对照组基础上采用保妇康栓治疗 ), 收集两组患者治疗前后的 HPV 感染阳性情况 。 结果: 治疗前两组患者 RLU/CO 值 无 明显 差异 ( P > 0.05 ) , 治疗后,观察组患者 RLU/CO 值明显低于对照组, 差异均有统计学意义 ( P < 0.05 ) 。 结论: 对 宫颈炎合并 HPV 感染 患者采用 保妇康栓 辅助治疗,治疗效果显著,值得临床推广。

  • 标签: 保妇康栓 宫颈炎 HPV 感染 重组人干扰素 α-2b
  • 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

  • 标签: 细胞因子 乙型肝炎病毒 诱导因素 临床
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  • 简介:摘要:目的: 观察高危型 HPV联合 TCT在宫颈癌筛查中的应用 价值。 方法: 选取我院 2018 年 1 月至 2019 年 1 月间进行的 宫颈 TCT取样 人员共 1000 例,比较患者的 HR -HPV 、 TCT 及组织病理学诊断结果。根据患者的病变程度将患者划分为正常或炎症组、宫颈上皮内瘤变( CIN )Ⅰ级组、宫颈上皮内瘤变Ⅱ级组、宫颈上皮内瘤变Ⅲ级组及宫颈癌组。 结果: 对患者进行单独的 HR-HPV 、 TCT 诊断, HR-HPV 联合 TCT 诊断中宫颈上皮内瘤变Ⅰ级组、宫颈上皮内瘤变Ⅱ级组、宫颈上皮内瘤变Ⅲ级组及宫颈癌组阳性率高于正常或炎症组。联合诊断灵敏度较单独 HR -HPV 诊断或 TCT 诊断明显提高。 结论: 高危型HPV联合 TCT在宫颈癌筛查中的应用效果较好,可以提高 诊断灵敏度。

  • 标签: 高危型 HPV 联合 TCT病变筛查 宫颈癌
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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

  • 标签: 乙肝病毒性肝炎 两对半临床医学检验 HBV-DNA定量检测,应用探究