简介:以质子泵抑制剂(PPI)为基础的三联疗法的幽门螺杆菌(H.pylori)根除率不尽相同,可能与细胞色素P450(CYP)2C19基因多态性有部分关联。目的:研究CYP2C19基因多态性对亚洲人群中以PPI为基础的三联疗法H.pylori根除率的影响。方法:在PubMed、EMBASE、CNKI和万方数据中进行系统文献检索,以RevMan4.2.8软件行荟萃分析。结果:共17篇文献纳入荟萃分析。不考虑PPI类型,CYP2C19弱代谢型(PM)与杂合子强代谢型(HetEM)之间、PM与纯合子强代谢型(HomEM)之间、HetEM与HomEM之间H.pylori根除率均有显著差异(PM对HetEM:OR=1.75,95%CI1.24—2.47.舟0.002;PM对HomEM:OR=2.82,95%CI1.73~4.60,P〈0.0001;HetEM对HomEM:OR=1.84,95%CI1.33-2.57,P=-0.0003)。在以奥美拉唑或兰索拉唑为基础的三联疗法中,PM与HomEM之间、HetEM与HomEM之间且pylori根除率均有显著差异(含奥美拉唑方案PM对HomEM:OR=4.37,95%CI1.86—10.26.P=0.0007,HetEM对HomEM:OR=3.15,95%CI1.75—5.66,P=0.0001;含兰索拉唑方案PM对HomEM:OR=3.06.95%CI1.56-6.00。P=0.001。HetEM对HomEM:OR=1.95,95%CI1.03~3.70,P=0.04)。在以雷贝拉唑为基础的三联疗法中,PM、HetEM、HomEM三组间H.pylori根除率均无明显差异。结论:在亚洲人群中,以奥美拉唑和兰索拉唑为基础的三联疗法.其H.pylori根除率受CYP2C19基因多态性影响,以雷贝拉唑为基础的三联疗法则否。
简介:目的研究c—erbB—2和c—myc癌基因在胃癌组织中扩增的意义。方法应用非放射性原位杂交技术检测81例胃癌标本中c—erbB—2和c—myc的扩增情况。结果C—erbB—2和c—myc在胃癌中的扩增率分别为50.6%和67.9%。c—erbB—2基因与胃癌组织分化程度、浸润深度及淋巴结转移有关(P〈0.05),分化程度越差、浸润深度越深、淋巴结有转移,c—erbB—2基因表达率越高,而C—myc癌基因与胃癌组织分化程度、浸润深度及淋巴结转移无关。两基因的扩增具有显著的相关性(x^2=7.26,P〈0.01)。结论c—erbB—2和c—myc扩增是胃癌发生过程中的一个重要的生物学因素,且两者具有较好的协同作用。
简介:目的掌握影响肝性脑病(HE)预后的危险因素。方法对国内发表资料完整、统计设计合理的11个HE研究(共1131例)进行荟萃分析。结果HE诱因分别为:消化道出血43.8%,感染33.9%,电解质紊乱29.1%,大量利尿和/或放腹水14.5%,饮食不节14.2%,肾功能衰竭13.0%,手术/创伤6.0%,药物4.5%,输血/输复合氨基酸3.2%,腹泻2.4%,便秘1.8%,原因未明/无2.7%.与HE死亡率相关因素包括:①诱因数:单一诱因死亡率33%,二种诱因为71.4%;三种或以上诱因为92.3%;三组间差异显著(P〈0.01)。②诱因纠正情况:可纠正组死亡率为18.2%,未纠正组为100%,二组间差异显著(P〈0.01)。③HE分期:Ⅰ期死亡率为O%,Ⅱ期为4.9%.Ⅲ期为34.4%,Ⅳ期为85.1%,四组间差异显著(P〈0.01)。④肝功(Child—pugh分级):A级死亡率为19.8%,B级为49.8%,C级为80.8%,三组间差异显著(P〈0.01)。结论重视HE预后的危险因素,警惕多种诱因并存,消除其不利影响。保护肝功能是改善HE预后的重要途径。
简介:AIMToinvestigatetheroleofthecomplement5a(C5a)/C5areceptor(C5aR)pathwayinthepathogenesisofacuteliverfailure(ALF)inamousemodel.METHODSBALB/cmicewererandomlyassignedtodifferentgroups,andintraperitonealinjectionsoflipopolysaccharide(LPS)/D-galactosamine(D-GalN)(600mg/kgand10μg/kg)wereusedtoinduceALF.TheKaplanMeiermethodwasusedforsurvivalanalysis.Serumalanineaminotransferase(ALT)levels,atdifferenttimepointswithina1-wkperiod,weredetectedwithabiochemistryanalyzer.Pathologicalexaminationoflivertissuewasperformed36hafterALFinduction.Serumcomplement5(C5),C5a,tumornecrosisfactor-α(TNF-α),interleukin(IL)-1β,IL-6,high-mobilitygroupproteinB1(HMGB1)andsphingosine-1-phosphatelevelsweredetectedbyenzyme-linkedimmunosorbantassay.Hepaticmorphologicalchangesat36hafterALFinductionwereassessedbyhematoxylinandeosinstaining.ExpressionofC5aR,sphingosinekinase1(SphK1),p38-MAPKandp-p38-MAPKinlivertissue,peripheralbloodmononuclearcells(PBMCs)andperitonealexudativemacrophages(PEMs)ofmiceorRAW264.7cellswasanalyzedbywesternblotting.C5aRmRNAlevelsweredetectedbyquantitativereal-timePCR.RESULTSActivationofC5andup-regulationofC5aRwereobservedinlivertissueandPBMCsofmicewithALF.BlockadeofC5aRwithaC5aRantagonist(C5aRaC5aRa)significantlyreducedthelevelsofserumALT,inflammatorycytokines(TNF-α,IL-1βandIL-6)andHMGB1,aswellasthelivertissuedamage,butincreasedthesurvivalrates(P<0.01forall).BlockadeofC5aRdecreasedSphK1expressioninbothlivertissueandPBMCssignificantlyat0.5hafterALFinduction.C5aRapretreatmentsignificantlydownregulatedthephosphorylationofp38-MAPKinlivertissuesofALFmiceandC5astimulatedPEMsorRAW264.7cells.Moreover,inhibitionofp38-MAPKactivitywithSB203580reducedSphK1proteinproductionsignificantlyinPEMsafterC5astimulation.CONCLUSIONTheC5a/C5aRpath
简介:目的观察端粒酶催化亚基(hTERT)、c-myc在胆囊癌中的表达,探讨hTERT及c-myc与胆囊癌的相关性。方法采用免疫组织化学方法检测15例胆囊癌组织、癌旁组织、正常胆囊黏膜及20例胆囊腺瘤性息肉组织hTERT、c-myc的表达。结果①正常胆囊黏膜、胆囊腺瘤性息肉组织、癌旁组织及胆囊癌组织hTERT的阳性表达率分别为6,67%(1/15)、10.00%(2/20)、33.33%(5/15)及80%(12/15);c-myc阳性表达率分别为20.00%(3/15)、45.00%(9/20)、40%(6/15)及86.67%(13/15);胆囊癌组织中hTERT与c-myc阳性表达率明显高于其它组织(P〈0.05);②胆囊癌组织hTERT和c-myc表达与淋巴结转移有关,伴淋巴结转移的胆囊癌hTERT及c-myc阳性表达率明显高于无淋巴结转移者(P〈0.05);③c-myc在hTERT阳性的胆囊癌组织的表达率明显高于hTERT阴性组(P〈0.05)。结论hTERT过度表达在胆囊癌的发生发展过程中具有重要作用,c-myc在转录水平上调控hTERT的表达,进而激活端粒酶促进胆囊癌的形成。
简介:背景:临床上评估炎症性肠病活动性的方法有临床活动度、C反应蛋白(CRP)和血沉等,三者常不一致。目的:探讨CRP评估炎症性肠病活动性的价值。方法:以Logistic回归法分析80例克罗恩病(CD)、70例溃疡性结肠炎(UC)患者血清CRP与血沉、临床活动度、内镜表现活动性、组织学活动性、低白蛋白血症、贫血、白细胞升高的关系;比较临床严重度、病变部位和药物治疗对CRP的影响。结果:CD中CRP与血沉相关;UC中CRP与血沉、外周血白细胞升高相关。CRP在活动性CD中显著升高(P〈0.01),重度CD和结肠CD中CRP升高较其他各组明显(P〈0.05);活动性UC中CRP亦显著升高(P〈0.01),重度组中CRP升高较其他组明显(P〈0.05)。药物有效控制临床表现时.CRP显著下降(P〈0.01),复发时重新升高(P〉0.05)。结论:CRP升高更适于反映中至重度结肠CD和UC的活动性:具有快速反映药物治疗有效性的特点。
简介:AIM:Toevaluatetheimpactofsociodemographic/clinicalfactorsonearlyvirologicalresponse(EVR)topegin-terferon/ribavirinforchronichepatitisC(CHC)inclinicalpractice.METHODS:Weconductedamulticenter,cross-sectional,observationalstudyinHepatologyUnitsof91Spanishhospitals.CHCpatientstreatedwithpeginterferonα-2aplusribavirinwereincluded.EVRwasdefinedasundetectablehepatitisCvirus(HCV)-ribonucleicacid(RNA)or≥2logHCV-RNAdecreaseafter12wkoftreatment.AbivariateanalysisofsociodemographicandclinicalvariablesassociatedwithEVRwascarriedout.IndependentfactorsassociatedwithanEVRwereanalyzedusingamultipleregressionanalysisthatincludedthefollowingbaselinedemographicandclinicalvariables:age(≤40yearsvs>40years),gender,race,educationallevel,maritalstatusandfamilystatus,weight,alcoholandtobaccoconsumption,sourceofHCVinfection,alanineaminotransferase(ALT)andaspartateaminotransferase(AST)levels,andgammaglutamyltranspeptidase(GGT)(≤85IU/mLvs>85IU/mL),serumferritin,serumHCV-RNAconcentration(<400000vs≥400000),genotype(1/4vs3/4),cirrhoticstatusandribavirindose(800/1000/1200mg/d).RESULTS:Atotalof1014patientswereincludedinthestudy.Meanageofthepatientswas44.3±9.8years,70%weremale,and97%wereCaucasian.ThemainsourcesofHCVinfectionwereintravenousdrugabuse(25%)andbloodtransfusion(23%).SeventyeightpercentwereinfectedwithHCVgenotype1/4(68%hadgenotype1)and22%withgenotypes2/3.TheHCV-RNAlevelwas>400000IU/mLin74%ofpatients.ThemeanALTandASTlevelswere88.4±69.7IU/mLand73.9±64.4IU/mL,respectively,andmeanGGTlevelwas82±91.6IU/mL.Themeanferritinlevelwas266±284.8μg/L.Only6.2%ofpatientspresentedwithcirrhosis.Allpatientsreceived180mgofpeginterferonα-2a.Themostfrequentlyusedribavirindoseswere1000mg/d(41%)and1200mg/d(41%).Theplannedtreatm