简介：Inthepastdecade,usesofantisepticsanddisinfectantsinhospitalsandotherhealthcarecentersarerathercommon,butthechancetodevelopresistancetoantisepticsanddisinfectantsisalsoincreased.Acinetobacterbaumanniiisoneoftheopportunisticbacteriainvolvinginthenosocomialinfection.Inthepresentstudy,thecorrelationoftheantisepticresistanceinA.baumanniiandtheantisepticresistancegeneqacEΔ1wasinvestigatedbymeansofdeterminationofMICs.Meanwhile,theMICsofglutaraldehyde,chlorhexidine,benzalkoniumbromide,iodophorandtrichloroisocyanurateto80clinicalisolatesofA.baumanniiweredetectedbytubedilutionassayandtheresistancegenesintI1andqacEΔ1intheseisolateswereamplifiedbyPCRandverifiedbyDNAsequencer.ItwasfoundthattheMIC50forthese5antisepticstestedwere32,8,8,4and1μg/mlrespectively,andthedetectionratesofintI1andqacEΔ1genewere60.0%and77.6%respectively.Inaddition,55%ofthe80isolatessimultaneouslypossessedbothintllandqacEΔ1gene,andthepercentageofantisepticresistanceofA.baumanniicarringbothgenestobenzalkoniumbromidewerehigherthanthatwithoutthesetwogenes,however,therewasnosignificantdifferencebetweenintllandqacEΔ1gene.Theresultinbactericidalefficiencyassayindicatedthatchlorhexidinecouldstillproducerapidandstrongbactericidaleffectatconcentrationof1MICafter10minexposure.TheseresultssuggestthattheantisepticresistanceofA.baumanniitovariousantisepticsiscorrelatedwiththepresenceoftheantisepticresistancegenesqacEΔ1inbacteria,thuswarningthattheincreaseoftheantisepticresistanceshouldnotbeignoredandtherelativehighconcentrationorprolongedapplicationtimeisrequiredtoachieveasufficientbactericidaleffect.

简介：目的:应用转录组测序方法，分析北京地区人呼吸道合胞病毒(respiratory syncytial virus, RSV)A亚型优势流行基因型ON1地方株感染A549细胞后差异表达基因，为RSV防治提供潜在靶点。方法:选用已经过全基因组测序确定为RSV A亚型ON1基因型的地方株(61397-ON1)感染A549细胞，提取总mRNA，通过转录组测序筛选出与未感染的A549细胞为对照的差异表达基因，对其进行GO分析、KEGG通路分析，同时随机选择6个差异表达倍数大于2倍的基因进行qRT-PCR验证。结果:以未感染的A549细胞为对照，筛选出1 632个差异表达基因，其中807个基因表达上调，825个基因表达下调。差异基因主要参与细胞因子反应以及MAPK级联反应正向调控等免疫应答相关生物过程，并在MAPK信号通路、NOD样受体信号通路、p53信号通路、TNF信号通路、IL-17信号通路及NF-κB信

简介：烟曲霉是一种通过空气传播的机会性致病真菌。其感染免疫功能低下患者肺部并引起严重的侵袭性曲霉病。锌是微生物生长所必需的微量元素，所有真菌包括烟曲霉生长都需要锌元素。有研究表明宿主体内的真菌毒力高低与真菌摄取锌的能力直接相关。由于元素锌在人体内大部分与锌结合蛋白结合导致在宿主组织微环境中的离子浓度远低于真菌最适生长浓度。烟曲霉演化出几种锌转运蛋白，使烟曲霉能够在锌缺乏的条件下有效吸收锌元素，同时抵抗锌元素过量，防止对烟曲霉细胞造成损害。本文将总结概述烟曲霉锌稳态调控对其生长发育及毒力的作用以及相关基因。明确烟曲霉对元素锌水平调控基因的研究现状并探讨干扰烟曲霉锌稳态是否会成为开发治疗侵袭性曲霉病的新一代辅助治疗措施和真菌治疗方案。

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简介：ToobservetheeffectofGardeniaextractZGontheadsorptionquantityofherpessimplexvirustype1(HSV-1)soastoexplorethemechanismofitsantiviralactivity,fluoresceinisothiocyanate(FITC)wasusedasthefluorescentprobetolabelvirusesandheparinsodiumwasusedascontrol.Meanwhile,theeffectofGardeniaextractZGontheadsorptionquantityonthesurfaceofHep-2cellswasdeterminedbyflowcytometry.ItwasdemonstratedthatadsorptionofHSV-1onthesurfaceofHep-2cellsexhibitedthecharacterofsaturationandspecificityandheparinsodiumcouldpreventattachmentofvirusesonthesecells.Theseresultsareinaccordwiththosereportedpreviously.Itwasalsoprovedthatthemannerofdrug-usepriortoadsorptionorsimultaneoususeofdrugandadsorptionwasbetterthanadsorptionpriortodrug-use,andtheinhibitionratesoftheformerandlattermannerwere84.76%and82.92%respectively.Threemannersofdrug-usewithGardeniaextractZGwerealleffectivetoreducetheadsorptionquantityofviruses,especiallythemannerofsimultaneoususeofdrugandadsorptionwithanadsorptioninhibitionrateof68.46%.Fromtheaboveobservation,itisapparentthatthemechanismofanti-viralactivityofGardeniaextractZGmaybeviaseveralstepsinvolvedintheHSV-1adsorption.

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简介：WeareracingwithHIV-1,theetiologicagentforAIDSinhumanbeings[1,2],withtwopossibleendconsequences:ifwewin,HIV-1willbeunderourcontrolbyimmunologicortherapeuticmeasures;ifHIV-1wins,theSIVAfricanmonkeys'storywouldrepeatinhumans,i.e.,onlythefewindividualsthatarenotkilledbythevirus

简介：Wehavepreviouslydemonstratedtheabilityofmalariaparasitestointerferewithspecificimmuneresponses.CD4Tcellsspecifictoparasiteantigens,butnotCD4Tcellsspecifictoanirrelevantantigen,ovalbumin(OVA),aredeletedviaapoptosisduringmalariainfection.Itisofinterest,therefore,toinvestigatetheimmuneresponsesthatdevelopedfollowingvaccinationwiththe19kDacarboxylterminusofthemerozoitesurfaceprotein1(MSP119)inmicethathadpreviouslyexperiencedmalariainfection.Inthisstudy,pre-exposureofmicetoPlasmodiumyoeliielicitednativeanti-MSP119antibodyresponses,whichcouldbeboostedbyvaccinationwithrecombinantMSP119，Likewise,infectionofMSP119-primedmicewithPlasmodiumyoelii(P.yoelii)ledtoanincreaseofanti-MSP119antibodies.MSP119vaccinationofmalariapreexposedmiceorimmunizationbyinfection/cureofMSP119-primedmiceenabledthemicetosurvivechallengeinfection,withtheformergrouphavingslightlylowerparasitaemia.Thedatasuggestthatexposuretomalariainfectionprimesanaturalimmuneresponsewhichcanbeboostedbyvaccination.Thisinformationisrelevanttothedevelopmentofavaccineforuseinindividualslivinginmalaria-endemicareas.

简介：摘要：目的： 调查并分析毕节市地中海贫血基因型的分布情况。 方法：本试验选取 2017 年 1 月 ～2019 年 1 月期间 毕节市第一人民医院 诊 治的 地中海贫血 （简称地贫） 患儿 411 例为调查对象， 调查结果显示 411例患儿携带不同类型的地贫基因， 其中 a3.7最为常见，占比为 27.01%，其次是 17M，占比为 24.09%，然后是 SEM，占比为 21.90%。对于毕节市地贫患儿而言，主要以上述基因型为主，其他基因型占比较少。 41-42M、 654M、 CSM占比分别为 8.52%、 6.33%、 4.62%。其他基因型的占比均在 0.20%～ 0.50%之间。 结论：对于毕节市而言，地贫患儿的基因型排名前三的是 a3.7、 17M和 SEM，同时毕节市地贫患儿携带的基因型背景较为多样复杂，因而应建立地贫基因网络数据库，以加强调查和分析，进而提升毕节市的人口素质。

简介：摘要：目的： 调查并分析毕节市地中海贫血基因型的分布情况。 方法：本试验选取 2017 年 1 月 ～2019 年 1 月期间 毕节市第一人民医院 诊 治的 地中海贫血 （简称地贫） 患儿 411 例为调查对象， 调查结果显示 411例患儿携带不同类型的地贫基因， 其中 a3.7最为常见，占比为 27.01%，其次是 17M，占比为 24.09%，然后是 SEM，占比为 21.90%。对于毕节市地贫患儿而言，主要以上述基因型为主，其他基因型占比较少。 41-42M、 654M、 CSM占比分别为 8.52%、 6.33%、 4.62%。其他基因型的占比均在 0.20%～ 0.50%之间。 结论：对于毕节市而言，地贫患儿的基因型排名前三的是 a3.7、 17M和 SEM，同时毕节市地贫患儿携带的基因型背景较为多样复杂，因而应建立地贫基因网络数据库，以加强调查和分析，进而提升毕节市的人口素质。

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简介：ToexplorethemechanismoftheinhibitionofHIV-1byMycoplasmafermerttans,culturesupernatantsandthallodicproteinsfromM.fermerttansPG18werepreparedandtheproteincomponentsofthesupernatantswerepurifiedwithhighperformanceliquidchromatography(HPLC).Theinhibitoryactivitiestoreversetranscriptase(RT)andthenucleaseactivitiesweredetected;theinfluenceofM.fermerttansonIL-10secretionbybothnormalandH1V-1infectedhumanPBMCweredetermined,andtheinhibitoryeffectofrhIL-10onH1V-1replicationwasdetectedwithEI,ISAmethod.Theresultsshowedthatthepurifiedproteinswithamolecularweightof67-100kDaor10-25kDashoweda36%or34%inhibitoryac-tivitytoRTandpartialnucleaseactivity.ThethallodicproteincouldinducebothnormalandH1V-1infectedPBMCtosecretIL-10remarkably,andtothelatter,thiseffectwasmoreapparent.WhilerhIL-10couldinhibitreplicationofH1V-1inPB-MCinvitroinadose-dependantmanner.ItconcludesthattheinhibitoryeffectoftheM.fermentansPG18culturesupernatantsonRTandthepromotingeffectofPG18thallodicproteinonIL-10secretioninPBMCexplainthemechanismsofinhibitiontoHIV-1byM.fermentansPG18.

简介：摘要：目的 通过建立骨关节炎模型探讨整合素pI和GIT 1对软骨细胞的影响，及二者之间的调控关系。对临床上骨性关节炎的治疗起指导作用。 方法 采用约一周龄的年乳大鼠20只，用定量PCR和Western Blotting检测对照组、pcDNA3.1空载体转染组、pcDNA3.1-GIT 1过表达组、pcDNA3 . I -integrin-p1过表达组、integrin-p 1 siRNA组和NC siRNA组中，integrin-p1和GIT1的mRNA和蛋白质的表达水平，来判断integrin-p1和GIT1之间的调控关系。结论 integrin-p1可以调控GIT1的表达，GTI1可能是位于integrin-pI下游的一个关键分子。

简介：ToinvestigatethephenotypicknockoutofHIV-1chemokinecoreceptorCXCR4andCCR5byintrakinesanditsinhibitoryeffectonHIV-1infection.PrimaryhumanPBLsweretransducedwiththerecombinantvectorpLNCX-R-K-S-K(△NGFR),followedbyanti-NGFR/anti-IgG-magneticbeadmethodselectionandFCMdetection.ThetransducedPBLswereinfectedwithDP1HIV-1virusthereafterenvelope-mediatedsyncytiumformationandp24detectionwerecarriedouttostudytheblockageofHIV-1infectionbyco-inactivationofCCR5andCXCR4.pLNCX-R-K-S-K(△NGFR)-transducedPBILswereisolatedwithananti-NGFR/anti-IgG-magneticbeadmethod.Afterisolation,about70%ofthePBLswerepositivefortheNGFRmarker.WhenthetransducedPBLswereinfectedwithDP1HIV-1virus,envelop-mediatedsyncytiumformationwasalmostcompletelyinhibitedbypLNCX-R-K-S-K(△NGFR)transfection.Also,p24antigenwasverylowintheculturesofpLNCX-R-K-S-K(△NGFR)transducedPBLs.pLNCX-R-K-S-K(△NGFR)transductioninhibitedtheproductionofDP1p24antigenby15%,43%and19%ondays4,7and10respectively.ThelymphocyteswiththephenotypicknockoutofCCR5andCXCR4couldprotectprimaryhumanPBLsfromDP1HIV-1virusinfection.

简介：TodeterminewhetherthepossessionofcertainHLA-DQA1alleleswasassociatedwiththeriskofdevelopingidiopathicdilatedcardiomyopathy(IDC)andtosubstantiatetheroleofanautoimmunologicpathogenesisinIDC.TypetheallelesofHLA-DQA1bypolymerasechainreactionwithsequence-specificprimers(PCR-SSP)techniquein38patientsofidiopathicdilatedcardiomyopathy(7womenand31men),agedfrom17to56yearsoldwithdiagnosisbeingaccordingtoWorldHealthOrganizationcriteria(IDCgroup),in50patientsofend-stageheartfailureofknownetiology(18womenand32men),withagesrangingfrom34to72(HFgroup),andinthecontrolgroupconsistingofpresumably100healthysubjects(39womenand61men)fromthehealthsurvey,agedfrom30to59yearsold.ThefrequencyofHLA-DQA1*0501intheDCMpatientswassignificantlyelevatedthanthatintheHFandthecontrolgroup.MolecularanalysisoftheDQA1genepolymorphismperformedinthethreesubgroupsshowsanincreasedfrequencyofDQA1*0501amongpatientswithlessEF.TheHFgroupcarriesahighfrequencyofHLA-DQA1*0301.AnincreasedfrequencyofDQA1*0201andDQA1*0103wasfoundinthecontrolgroup.HLA-DQA1*0501isanassociatedgeneofidiopathicdilatedcardiomyopathyandthepossessionofDQA1*0301maybeindicativeoftheknownetiologicheartfailure,suggestingthatthemechanismsinvolvedinthepathogenesisofIDCandotherwiseheartfailurearedifferent.ImmunologicabnormalitiesmaybeamajorcontributortothesusceptibilityofdevelopingofIDC.

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