简介:AIMTocharacterizepunctualmutationsin23SrRNAgeneofclarithromycin-resistantHelicobacterpylori(H.pylori)anddeterminetheirassociationwiththerapeuticfailure.METHODSPCRproductsof23SrRNAgeneVdomainof74H.pyloriisolates;34resistanttoclarithromycin(29fromalow-riskgastriccancer(GC)population:Tumaco-Colombia,and5fromahigh-riskpopulation:Tuquerres-Colombia)and40fromasusceptiblepopulation(28fromTumacoand12fromTúquerres)weresequencedusingcapillaryelectrophoresis.TheconcordancebetweenmutationsofVdomain23SrRNAgeneofH.pyloriandtherapeuticfailurewasdeterminedusingtheKappacoefficientandMcNemar’stestwasperformedtodeterminetherelationshipbetweenH.pylorimutationsandclarithromycinresistance.RESULTS23SrRNAgenefromH.pyloriwasamplifiedin56/74isolates,ofwhich25wereresistanttoclarithromycin(20fromTumacoand5fromTúquerres,respectively).In17resistantisolates(13fromTumacoand4fromTúquerres)thefollowingmutationswerefound:A1593T1,A1653G2,C1770T,C1954T1,andG1827CinisolatesfromTumaco,andA2144GfromTúquerres.ThemutationsT2183C,A2144GandC2196TinH.pyloriisolatesresistanttoclarithromycinfromColombiaarereportedforthefirsttime.NoassociationbetweentheH.pylorimutationsandinvitroclarithromycinresistancewasfound.However,therapeuticfailureoferadicationtreatmentwasassociatedwithmutationsof23SrRNAgeneinclarithromycin-resistantH.pylori(κ=0.71).CONCLUSIONThetherapeuticfailureoferadicationtreatmentinthetwopopulationsfromColombiawasassociatedwithmutationsofthe23SrRNAgeneinclarithromycinresistantH.pylori.
简介:目的了解我国内镜治疗的临床科研现状。方法逐期逐页手工检索《中华消化内镜杂志》(1984~2002年)及《中国内镜杂志》(1996~2002年)中发表的临床对照实验,按cochrane协作网RCF、CCT资料库中的判定标准进行严格评价。结果《中华消化内镜杂志》19卷87期中共刊临床性文章1196篇,其中RCTs85篇(7.17%),CCTs4篇(0.34%)。《中国内镜杂志》7卷37期中共刊临床性文章1122篇,其中RCTs51篇(4.54%),CCTs6篇(0.53%)。结论我国临床内镜治疗的防治性研究RCTs的数量和质量,还不能满足临床实践的需要。