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简介：ＣＬＩＮＩＣＡＬＡＮＤＥＸＰＥＲＩＭＥＮＴＡＬＳＴＵＤＹＯＦＫＩＬＬＩＮＧＥＦＦＥＣＴＯＮＨＥＬＩＣＯＢＡＣＴＥＲＰＹＬＯＲＩＣＬＩＮＩＣＡＬＡＮＤＥＸＰＥＲＩＭＥＮＴＡＬＳＴＵＤＹＯＦＫＩＬＬＩＮＧＥＦＦＥＣＴＯＮＨＥＬＩＣＯＢＡＣＴＥＲＰＹＬＯＲ...

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简介：LongbeforethediscoveryofHelicobacterpylori,thereweremanyexcellentobservationalstudiesthatdocumenteddifferencesinthepatternsofgastroduodenaldisease.Itwasclearthatinthedevelopingworld,gastriculcerandgastriccancerweremorecommonthaninthedevelopedworldwhereduodenalulcerpredominated.Thiscorrelatedwiththedistributionofgastritisinduodenalulcerpatientswheretheinflammationwasantralpredominantwhileingastriculcerpatientsthegastritiswasmoreevenlydistributedthroughthestomach.Gastriculcersusuallyappearedinafairlyrestricteddistributioninthestomachneartheangulusandclosetothetransitionalzonebetweenantrumandbodymucosa.Asasocietydevelopedsothesepatternsofdiseasechanged.

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简介：AIM:Helicobacterpylori(Hpylori)hasbeenlinkedtochronicgastritis,pepticulcer,gastriccancerandMALT-lymphoma.ThelinkofgenotypesofHpyloritogastriccancerremainscontroversial.TheaimofthisstudywastoinvestigatetheHpylorivacAalleles,cagAandiceAinpatientswithgastriccancerinTaiwan.METHODS:Patientswithgastriccancer,pepticulcerandchronicgastritiswereenrolledinthisstudy.Weobtainedbiopsyspecimensfromthestomachatleast2cmawayfromthetumormargininpatientswithgastriccancer,andfromtheantrumofstomachinpatientswithpepticulcerorchronicgastritis.DNAextractionandpolymerasechainreactionwereusedtodetectthepresenceorabsenceofcagAandtoassessthepolymorphismofvacAandiceA.RESULTS:Atotalof168patients(gastriculcer:77,duodenalulcer:66,andchronicgastritis:25)werefoundtohavepositivePCRresultsofthebiopsyspecimensfrompatientswithpepticulcerandchronicgastritis.WefoundpositivecagA(139/168,83%),m2(84/168,50%)andiceA1(125/168,74%)strainsinthemajorityofpatients.Inpatientswithgastriccancer,thevacAslaandslcsubtypeswerelesscommonlyfoundthanthoseinnon-cancerpatients(35/66vs127/168,P=0.0001forslaand13/66vs93/168,P<0.0001forslc).Inthemiddleregion,themlTstraininpatientswithgastriccancerwasmorethanthatofnon-cancerpatients(23/66vs33/168,P=0.02).CONCLUSION:InTaiwan,HpyloriwithpositivevacAsla,cagAandiceA1strainsarefoundinthemajorityofpatientswithgastriccancerornon-cancerpatients.Inpatientswithgastriccancer,thevacAs1aandslcsubtypesarelessandm1Tismorethaninpatientswithpepticulcerandchronicgastritis.

简介：AIM:Toconstructanon-resistantandattenuatedSalmonellatyphimurium(S.typhimurium)strainwhichexpressesconservativeregionofadhesionABofHelicobacterpylori(Hpylon)andevaluateitsimmunogenicity.METHODS:TheABgeneamplifiedbyPCRwasinsertedintotheexpressionvectorpYA248containingasdgeneandthroughtwotransformationsintroducedintothedeltaCya1deltaCrp1deltaAsdattenuatedSalmonellatyphimuriumstrain,constructingbalancedlethalattenuatedSalmonellatyphimuriumstrainsX4072(pYA248-AB).BridgedELISAmethodwasusedtomeasuretheexpressionofABantigeninsonicateandculturesupematant.AccordingtothemethoddescribedbyMeacock,stabilityoftherecombinantwasevaluated.Semi-lethalcapacitytestwasusedtoevaluatethesafetyofrecombinant.Theimmunogenicityofrecombinantwasevaluatedwithanimalexperiments.RESULTS:TheattenuatedS.typhimuriumX4072(pYA248-AB)whichexpressesABwassuccessfullyconstructed.Furthermore,bridgedELISAassayshowedthatthecontentofABinrecombinantX4072(pYA248-AB)culturesupematantwashigherthanthatwasinthalluslyticliquor.AndafterrecombinantX4072(pYA248-AB)wasculturedfor100generationswithoutselectionpressure,bheentirerecombinantbacteriaselectedrandomlycouldgrow,andtheABantigenwasdefectedpositivebyELISA.ThegrowthcurveoftherecombinantbacteriashowedthatthegrowthstatesofX4072(pYA248)andX4072(pYA248-AB)werebasicallyconsistent.ThesurvivalrateofC57BL/6wasstill100%,at30daftermicetakingX4072(pYA248-AB)1.0×l0^10cfuorally.OralimmunizationofmicewithX4072(pYA248-AB)inducedaspecificimmuneresponse.CONCLUSION:Invitrorecombinantplasmidappearstobestableandexperimentsonanimalsshowedthattherecombinantstrainsweresafeandimmunogenicinvitro,whichprovidinganewliveoralvaccinecandidateforprotectionandcareofHpyloriinfection.

简介：ToinvestigatetheprotectiveeffectofdecoctionofliaoweiongastricmucosaofH.pyloriassociatedchronicatrophicgastritisinrats.TheH.pyloriassociatedchronicatrophicgastritismodelswereinducedwithsodiumdeoxycholate,sodiumsalicylate,ethanol,andculturebrothofH.pylori.ProtectiveeffectofdecoctionofliaoweiongastricmucosaofH.pyloriassociatedchronicatrophicgastritiswasobservedquantitatively.