简介：ThegenomeoftheenterohemorrhagicEscherichiacoliO157:H7EDL933contains177“O”-islands(OIs).TostudytheirpotentialcontributiontotheO157-specificpathogenicity,wesurveyedthedistributionof22OIsbyPCRandDNAhybridizationin17isolatesofShigatoxinproducing(Stx-positive)E.coliO157:H7,andcomparedwiththeirdistributionin21isolatesofStx-negativeE.coliO157and21isolatesofnon-O157entericpathogens.Fourteenof22OIswerepresentinnon-O157entericpathogensanalyzed.Eightof22OIswerefoundonlyinthe17Shigatoxin-(Stx)positiveE.coliO157:H7isolates,buttheywereabsentfromthe21Stx-negativeE.coliO157:NMandO157Hundisolatestested.Amongthe8OIs,onlyOI43orOI48wereexclusivelydetectedinStx-positiveE.coliO157:H7,absentfromneitherofStx-negativeE.coliO157andnon-O157entericpathogens,suchasSalmonella,ShigeUa,Citrobacter,Vibriocholera,enteropathogen-icE.coli(EPEC),enteroadherentE.coli(EAEC),enteroinvasiveE.coli(E1EC)andenterotoxingenicE.coli(ETEC).TheOI43andOI48are83kbinsizeandidenticalinDNAsequences,whichencodegenesforurease,telluriteresistanceandadherence.ByanalyzingtheirjunctiongeneswithPCRandDNAhybridization,wefoundthat21ChineseisolateshaveOI48only.However,for7Japanesepatientisolates,4haveOI43and3haveOI48;forAmericanisolates,2havebothofO143andOI48,2haveOI48only.ThesedataconfirmedthehighlyplasticityofthepathogenicE.coligenome.TheuniquepresenceofOI43/OI48inStx-positiveE.coli0157:H7denotesitscriticalroleinthepathogenicityspecifictothispathogen.

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简介：Mycoplasmagenitaliumisthemaincausativeagentfornon-gonococcalandnon-chlamydialurethritis.P32istheputativesurface-exposedmembraneproteinofM.genitaliumandithassubstaintialidentityinaminoacidsequencewithadhesinproteinP30fromM.pnewnoniae.SinceM.pneumoniaemutantslackingP30proteinisdefectiveincytadherence,P32proteinhasbeenproposedtobeanessentialadhesinimplicatedintheadherenceofM.genitaliumtohostcells.TheprokaryoticexpressionvectorpET-30(+)/p32wasconstructedinthepresentstudy,andtherecombinantproteinwasexpressedinE.coliandpurifiedunderdenaturingcondition.Asdemonstratedbytheimmunoblottinganalysis,therecombinantproteincouldreactwithrabbitantiseraagainstM.genitalium,andadherenceinhibitionassayswerepetformedwithantiseraagainstthisrecombinantprotein.ItwasdemonstratedthatP32proteinapperaredtobeanadhesionproteinofM.genitalium,thusprovidingtheexperimentalbasisforbetterunderstandingofthepathogenesisofM.genitaliuminfectionandforthedevelopmentoftherelatedvaccinesagainsttheinfection.

简介：【摘要】

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简介：CytoehromeP450norgenewasclonedintotheexpressionvectorpET-28toyieldtherecombinantexpressionplasmidpET-P450nor,whichcoulddirectthesynthesisofaeukaryoticderivedproteininEscherichiacoliBL21.Thevectorallowsoverproductionandsingle-steppurificationof(His)6-taggedcytoehromeP450norbythefacifitationofmetal(Ni^2+)chelateafl]nitychromatography.TheexpressionlevelofcytoehromeP450norwashighat30℃afterIPTGinduction.SDSPAGEandWesternblotanalysisshowedaspecificband(about43kDa).TheoverproducedcytochromeP450norwaspurifiedtoeleetrophoretichomogeneitywithin2.5handabout20.8mgpurifiedproteinwasobtainedfrom2Lcellculture.TheproliferationofSSMC-7721celllinecouldbeinhibitedbycytoehromeP450nor.Rabbitpolyclonalantibodies(titerover64000)wereproducedagainstrecombinantcytoehromeP450norandprovedtobeveryusefulforimmunoblottingstudy.AvailabilityofthisexpressionsystemandspecificantibodiesshouldfacilitatecharacterizationoftheroleofcytochromeP450norinthemetabolismofNO.

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简介：ThisstudywasaimedtoobservetheexpressionofP70S6kinase(P70S6K)inoralaciniccellcarcinoma.PT0S6kinaseexpressionwasexaminedbymeansofWestern-blottestandActivityas-say.Specimenswerefrom30casesoforalaciniccellcarcinomaand15casesofnormaloraltissuewereusedascontrols.StatisticalanalysissoftwareSPSS10.0wasusedforttesttodeterminetherelationshipbetweengeneexpressionandclinicalfeatures.TheexpressionlevelofP70S6Kincreasedobviouslyinoralaciniccellcarcinomatissue(P<0.01).ActivityassaywasthesameastheWestemblottest(P<0.01).P70S6Kexpressionlevelandactivityplayedanimportantroleinthedevelopmentoforalaciniccellcarcinoma.Inconclusion,P70S6Kisamplifiedandoverexpressedinoralaciniccellcarci-nomatissue,whichsuggestsapotentialoncogenicfunction.P70S6KandotherpossibletargetsofmTORcontributesignificantlytotumordevelopmentandthatinhibitionoftheseproteinsmaybethera-peuticforcancerpatients.OverexpressionofP70S6Kmaybeinvolvedinthepathogenesisoforalacin-iccellcarcinoma.

简介：【摘 要】目的： 分析心肌梗死患者介入治疗后实施Ⅰ期心脏康复护理对患者心理状态的影响。 方法： 本文研究初始时间为 2018 年 4 月，结束时间为 2019 年 8 月，共选择 96 例心肌梗死介入治疗患者。随机分为两组，对参照组患者予以一般护理，对实验组患者予以Ⅰ期心脏康复护理。分析两组患者的临床护理效果。 结果： 参照组患者 SDS 评分、 SAS 评分与实验组比较均显著更高， P<0.05 ；参照组患者左心室收缩末期内径与实验组比较显著更高， P<0.05 ；参照组患者左心室射血分数与实验组比较显著更低， P<0.05 。 结论： 针对心肌梗死介入治疗患者实施 Ⅰ期心脏康复护理，有利于改善患者心功能，缓解不良情绪，具有较高应用价值，值得推广。

简介：摘要 目的 比较前交叉韧带（anterior cruciate ligament，ACL）重建术中股骨侧I.D.E.A.L.定位和解剖定位两种方式的短期临床效果。方法：选取2019年10月至2020年10月我院行ACL重建手术的43名患者。随机分为两组：股骨侧I.D.E.A.L.定位21例、解剖定位22例，均选择单束重建。比较两组术前术后12月Lachman试验、轴移试验阳性率；术后3月、6月、12月IKDC评分、Lysholm评分及术后6月重建移植物与胫骨平台夹角。结果：两组术后Lachman试验、轴移试验阳性率较术前显著降低（

简介：摘要目的：为先兆流产患者提供寿胎丸治疗并分析治疗效果及其对患者血清中雌二醇及孕酮的影响；方法：选取2018 年1 月至2018 年12 月于本院接受治疗的早孕先兆流产患者100 例。将实施寿胎丸加地屈孕酮治疗的设定为实验组（50 例），将实施地屈孕酮的设定为对照组（50 例），对比两组患者在治疗有效率、血清孕酮和雌二醇浓度以及人绒毛膜促性腺激素浓度等方面的差异；结果：实验组各项指标均显著优于对照组（P<0.05 ）；结论：为先兆流产患者提供寿胎丸治疗，能够有效提升患者血清孕酮、雌二醇和人绒毛膜促性腺激素浓度水平，改善黄体功能。

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简介：ToconstructandexpressthefusionproteinStx2B-IntiminC300ofEHEC0157:H7,andtofurtherinvestigateitsimmunoprophyiacticpotential,thegeneofStx2B(stx2b)fromEHEC0157:H7chromosomewasclonedintopMD18-Tvector.Thereafter,theamplifiedgenewasclonedintoprokaryoticexpressionplasmidpET-28a(+)-eaeC300,whichwasconstructedpreviously.TherecombinantpasmidpET-28a(+)-stx2b-eaeC300wastransformedintoE.coliBL21(DE3).Afterinducement,theproteinStx2B-IntiminC300wassuccessfullyexpressedandanalyzedwithsodiumdodecylsulfatepolyacrylamidegelelectrophoresis(SDS-PAGE),WesternblottingandN-terminalaminoacidresidualsequencing.Toevaluateitsimmunoprophyiacticpotential,itwasprimarilypurifiedbyion-exchangechromatographyandinjectedinto30BALB/cmicewithAl(OH)3inthesubscapularregion.Tendaysafterthelastboostervaccination,20micewereattackedwithEHEC0157:H7lysateandtheprotectiveefficacywasobserved.Inthepresentstudy,thegeneofStx2B-IntiminC300wassuccessfullyclonedintopET-28a(+)vector.TheresultsofSDS-PAGEandWesternblottingassayshowedthatthefusionproteinwassuccessfullyexpressedintheinclusionbodyform,accountingfor25%oftotalexpressionproducts,anditsmolecularweightwasabout43kDa.TheresultoftheN-terminalaminoacidresidualsequencingshowedthatitwasidenticaltothatofthemoleculardesigned.Thepuritywasabout75%afterprimarypurification.AnimaltestsrevealedthatthefusionproteinStx2B-IntiminC300haselicitedhightiterofprotectiveantibodyrelatively.TheseresultsdemonstratethatthefusionproteinStx2B-IntiminC300issuccessfullyexpressedinprokaryoticexpressionsystemandshowscertainimmunoprophyiacticpotential.

简介：摘要：目的： 应用改良的穿刺系统穿刺家兔股动脉制作急性脑梗塞模型，旨在提高制作过程中股动脉穿刺的成功率。方法： 选择成年健康的家兔 40只 ,随机分为两组， A组（实验组） 20只， B组（对照组） 20只。 A组应用改良后的 24G静脉留置套管针，采用 seldinger法穿刺股动脉，超选择性插管至右侧颈内动脉，经微导管缓慢注入预制自体血栓栓塞颈内动脉制成急性脑梗塞模型。 B组切开暴露股动脉 18G穿刺针穿刺，引入微导管插管至右侧颈内动脉，与 A组同样的办法栓塞右侧颈内动脉。结果： A组 1只股动脉穿刺失败， 19只股动脉穿刺并右侧颈内动脉均栓塞成功，成功率为 95%。 B组 14只股动脉穿刺失败， 6只股动脉穿刺成功并顺利栓塞右侧颈内动脉，穿刺部位渗血均较严重，造模成功率为 30%。两组造模成功率统计学差异有显著性。结论： 改良穿刺系统穿刺家兔股动脉制作急性脑梗塞模型，具有操作简单、快捷、成功率高、出血少的特点，是一种符合实际应用的技术。

简介：【摘 要】目的：评价临床教学过程中使用产前肛查和阴道检查模型可取得的教学效果。方法：本课题中共纳入了 2015级助产班的 30名实习生，需要分成两组来进行研究对比，名称为对照组中有实习生 15名，名称为试验组中有实习生 15名。对照组进行教学时借助了传统的观看录像的方式，试验组进行教学时借助了产前肛查及阴道检查模型，将技能知识掌握情况、产前肛查、产前阴道检查等技能操作考核成绩确定为两组需要比较的项目。结果：试验组的技能知识掌握评分、产前肛查操作考核成绩、产前阴道检查操作考核成绩这三项与对照组作比较， P为＜ 0.05，有显著性。结论：通过自制产前肛查和阴道检查模型可帮助助产专业学生更好的掌握产前肛查及阴道检查等相关操作技能，整体教学效果良好，有推广和普及的意义。

简介：【摘要】 目的 研究分化型甲状腺癌患者首次接受大剂量 131I“清甲”治疗的外周血细胞和肝肾功能变化的情况。方法 50例分化型甲状腺癌术后患者服用 3.7GBq的 131I行“清甲”治疗，于治疗前及治疗后 3月检测患者的白细胞、血小板、红细胞、粒细胞、淋巴细胞及肝肾功能，并进行分析。结果 外周血细胞中， WBC、 PLT 、 LYN%治疗后较治疗前减低，差异有统计学意义（ P<0.05）， RBC 、 GRA%治疗前后变化差异无统计学意义（ P>0.05）。 50例患者中有 6例（ 6/50）治疗后出现白细胞减低 <4.0×109，其中 3例（ 3/50）低于 3.0×109； 1例（ 1/50）患者血小板低于正常， 3例（ 3/50）淋巴细胞百分比低于正常。肝肾功能治疗前后变化无统计学意义（ P>0.05）结论 分化型甲状腺癌术后首次大剂量 131I“清甲”治疗是安全的，对患者的身体影响轻微，但对少部分白细胞减少的患者，需要严密监测。

简介：Wehaveconfirmedefficientanti-tumoractivitiesoftheperipherallymphocytestransducedwithap185HER2-specificchimericT-cellreceptorgenebothinmurineandinhumaninourpreviousstudies.TofurthertestthefeasibilityofchimericT-cellreceptorinabonemarrowtransplantationmodel,wefirst,madetwomurinetumorcelllines:MT901andMCA-205,toexpresshumanp185HER2byretroviralgenetransduction.MurinebonemarrowcellswereretrovirallytransducedtoexpressthechimericT-cellreceptorandgene-modifiedbonemarrowcellsweretransplantedintolethallyirradiatedmouse.Sixmonthsposttransplantation,p185HER2-positivetumorcells:MT-901/HER2orMCA-205/HER2wassubcutaneouslyorintravenouslyinjectedtomakemousemodelssimulatingprimarybreastcancerorpulmonarymetastasis.Theinvivoanti-tumoreffectsweremonitoredbythesizeofthesubcutaneoustumororcountingthetumornodulesinthelungsafterIndiainkstaining.ThesizeofthesubcutaneoustumorwassignificantlyinhibitedandthenumberofpulmonarynodulesweresignificantlydecreasedinmouserecipientstransplantedwithchimericT-cellreceptormodifiedbonemarrowcellscomparedwiththecontrolgroup.Ourresultssuggesttheefficientinvivoanti-tumoractivitiesofchimericT-cellreceptorgenemodifiedbonemarrowcells.

简介：WehavedevelopedandtestedchimericT-cellreceptors(TCR)specificforp185HER2.Intheseexperiments,retroviralvectorsexpressingtheN297orN29ξreceptorswereconstructedinpRET6.AmphotropicviralproducercellswereestablishedintheGALV-basedPG13packagingcellline.Ficollpurifiedhumanperipheralbloodlymphocytes(PBL)werevitallytransducedusinganoptimizedprotocolincorporatingactivationwithimmobilizedanti-CD3/anti-CD28monoclonalantibodies,followedbyviralinfectioninthepresenceoffibronectinfragmentCH296.Transducedcellswereco-culturedwithhumantumorcelllinesthatoverexpress(SK-OV-3)orunderexpress(MCF7)p185HER2toassayforantigenspecificimmuneresponses.BothCD4^+andCD8^+T-cellstransducedwiththeN297orN29ξchTCRdemonstratedHER2-specificantigenresponses,asdeterminedbyreleaseofTh1likecytokines,andcellularcytotoxicityassays.OurresultssupportthefeasibilityofadoptiveimmunothempywithgeneticallymodifiedT-cellsexpressingachTCRspecificforp185HER2.

简介：摘要：目的：观察人参皂苷对苯丙酮尿症模型大鼠学习记忆能力的影响。方法：采用 dl- 对氯苯丙氨酸 +l- 苯丙氨酸诱导苯丙酮尿症模型大鼠，通过水迷宫空间分辨能力测试，研究人参皂苷对苯丙酮尿症（ PKU ）模型大鼠学习记忆的影响。结果：结论：人参皂苷明显改善苯丙酮尿症模型大鼠学习记忆障碍的作用。

简介：摘要：蒙医灸疗法作为蒙医传统疗法之一，在治疗失眠症方面有独特的优势及发展前景。研究表明DA含量的增多是引起失眠的主要原因之一，DA有调节睡眠的作用。笔者在前期研究基础上观察施灸赫依三穴对失眠模型大鼠脑干内DA含量的影响，以期进一步为蒙医灸疗治疗失眠提供实验依据。