简介：

简介：Objective:ThispaperistoexploreamethodoftransferringhumanSDF-1anditsmutantSDF-1/54intrakinegeneintoCOS-7cellsfordeterminingtheirexpressionandsubcelluarlocalizationofthefusionprotein.Thiscouldofferfeasibilityforinhibitingthemetastasisofmalignanttumorsbyphonotypicknockoutforblockingfunctionalexpressionofreceptoronthecell-surface.Methods:AmplifythetargetgenewithPCRfromtheconstructedplasimidSDF-WT-Gly×4-Dec/PET-30a(+)withaC-terminalretentionsignalfragmentKDEL.AfterthepcDNA3.1/SDF-1/KDEL,pcDNA3.1/SDF-1/54/KDEL,pEGFP/SDF-1/KDELandpEGFP/SDF-1/54/KDELeukaryoticexpressionvectorswereconstructedandtheDNAsequencewasaccurate,theyweretransferredintoCOS-7cellswithliposome.Theexogenousexpressionswereobserved,fusionproteinSDF-1/HisandSDF-1/54/HiswereconfirmedbyWesternblot,andtheSDF-1/EGFPandSDF-1/54/EGFPweredeterminedbyLaserScanningConfocalMicroscopy.Results:Fourexpressionvectorswereconstructedsuccessfully,thefusionproteinSDF-1/KDEL/HisandSDF-1/54KDEL/HisexpressedinCOS-7cells.SubcelluarlocalizationanalysisshowedthatSDF-1/KDEL/EGFPandSDF-1/54/KDEL/EGFPwerelocatedmainlyinendoplasmicreticulum.Conclusion:FourexpressionvectorspcDNA3.1/SDF-1/KDEL,pcDNA3.1/SDF-1/54/KDEL,pEGFP/SDF-1/KDELandpEGFP/SDF-1/54/KDELwereconstructedsuccessfully,whichcouldexpressineukaryoticcellandlocatemainlyintheendoplasmicreticulum.

简介：

简介：ＣＨＡＮＧＥＳＯＦ６－Ｋ－ＰＧＦ１ａＲＥＬＥＡＳＥＦＲＯＭＴＨＥＬＵＭＩＮＡＬＳＵＲＦＡＣＥＯＦＤＡＣＲＯＮＳＥＥＤＥＤＷＩＴＨＡＵＴＯＬＯＯＵＳＶＥＮＯＵＳＴＩＳＳＵＥＦＲＡＧＭＥＮＴＳＣＨＡＮＧＥＳＯＦ６－Ｋ－ＰＧＦ１ａＲＥＬＥＡＳＥＦＲＯＭＴＨ...

简介：目的p27Kip1是一种细胞周期素依赖激酶抑制物,它抑制G1期的进程并对其进行调节。方法采用乳化-溶剂挥发法制备含p27kip1的纳米粒子,粒度集中分布在243～343nm,平均粒度为288．9nm,粒径呈窄分布,粒度分布指数为0．192。p27Kip1纳米粒子的载基因率为3％。包封效率为86％。p27Kip1基因纳米粒子的体外释放,开始的5d累积释放曲线接近直线,约1周后释放量开始变慢,释放曲线缓慢上升,可平稳维持释放2周以上。用p27kip1基因纳米粒子转染大鼠动脉平滑肌细胞,分为p27Kip1基因纳米粒子组、空白纳米粒子组、对照组,培养48h后收集细胞,流式细胞仪测定p27kip1纳米粒子对细胞周期调控的结果显示转染前细胞G1／G0期比例为92．4％,转染后48h,对照组及空白纳米粒子组G1／G0期比例为64．5％、68．3％,S期为12．4％、10．3％,表明G0／G1→S的过程非常迅速,细胞增殖活跃。而基因组G1／G0期比例为88．3％,S期为7．2％,说明细胞发生G1期阻滞,细胞增殖受到抑制。建立大鼠自体静脉移植模型,随机分成转基因治疗组、空白纳米粒子组、单纯静脉移植组,应用显微...

简介：胆囊结石是最常见的胆系疾病,B超对其诊断有着很高的敏感性,对胆囊内探及强回声光团,后方伴有声影,随体位变动而位移三特征的典型胆囊结石,B超诊断符合率可达95～97％,但对发生在特殊部位的特殊类型的胆囊结石,B超却易漏诊误诊,为引起同

简介：PACScanbeappliedinthenetworkarchitectureofClient/Server(C/S)andBrowser/Server(B/S)incurrentapplicationofhospitalinformationsystem.PACSViewerofB/Smodelisrealizedbymeansofthebrowsercommonly,butwebbrowserdoesnotsupportDICOMstandard.Inthisarticle,howtouseJavaApplettorealizethedisplayandoperationsofDICOMimageswillbediscussed.ThelightweightmethodtoviewDICOMimagesisveryfitfortelemedicaltreatment,andthesituationsnotrequirestrongabilityinimageoperations。

简介：由各种原因所致的腹腔积液患者282例,男112例,女170例,平均年龄45.2岁。用岛津SDL—310型及日立EUB—305型超声显像仪进行检查,并对部分患者做了血清蛋白测定。结果表明,不同积液在超声下内部回声不同。肝硬化、心肾疾病、营养不良所致漏出液,暗区透声性好,内部光点回声少。癌性腹水暗区内出现散在或密集光点回声,内可有分隔粘连。62例肝硬化腹水胆囊壁全部增厚,80.6％患者呈双边影;癌性腹水54例中63％不增厚。血清白蛋白测定,32例(80％)肝硬化患者小于30s/L,35例(87.5％)呈A/G倒置,而癌性腹水中32例(82.1％)大于30g/L。作者认为结合临床对腹腔积液的成因进行探讨,可提高腹腔积液诊断的临床符合率。

简介：ImagegeometrydistortionisanimportanttechnicalstandardinB-modeultra-sounddiagnosissystem.ThispaperinvestigatesthecauseofimagedistortioninphasedarrayB-modeultrasounddiagnosissystem.Thefirstdistortioncauseisthedelayerrorofcompoundwavebind.Phasedarrayultrasoundtranduceriscomposedofmanyrectangleunits.Withcontrollinginspiringplustime,ultrasoundwave

简介：ThispaperdealswiththetemperaturecorrelationofgrayscaleofBmodeultrasoundimagefromheatedtissue.Inthisstudy,manyin-vitrofreshpigliversareheatedinatemperaturerangefrom28℃to45℃,fromwhichaseriesofB-modeultrasonicimagesofliverswereobtained.Thegray-valueisevaluatedfromtheultrasoundimagesrespectively.Acorrelationofthemeangrayvalueoftheselectedregions(12×12pixels)inB-modeultrasonicimagesofliveranditstemperaturewaspointedout.Andtheexperimentresultsagreedtheevaluationwell.Anditispossibletomonitorthetissuetemperaturechanginginhyperthermiausingthiscorrelation.