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POBox2345Beijing100023,ChinaFax:+86-10-85381893Email:wcjd@wjgnet.com•基础研究BASICRESEARCH•CagA+幽门螺杆菌胃癌前及癌变中NF-κB的表达增强李国平,吴灵飞,蒲泽锦,冯家琳,郑宗茂,王炳周李国平,吴灵飞,蒲泽锦,郑宗茂,王炳周,汕头大学医学院第二附属医院消化科广东省汕头市515041冯家琳,汕头大学医学院第二附属医院信息科广东省汕头市515041李国平,男,1968-02-01生,湖北省天门市人,汉族,1992年湖北医科大学本科毕业,1998年湖北医科大学硕士研究生,主治医师,主要从事消化系统疾病的临床和科研工作.广东省科技厅资助项目,No.2003C30307通讯作者:吴灵飞,515041,广东省汕头市东厦北路,汕头大学医学院第二附属医院消化科.lingfeiwu@21cn.com电话:0754-8915810传真:0754-8346543收稿日期:2005-06-28接受日期:2005-07-15Guo-PingLi,Ling-FeiWu,Ze-JinPu,Zong-MaoZheng,Bing-ZhouWang,DepartmentofGastroenterology,theSecondAffiliatedHospital,MedicalCollegeofShantouUniversity,Shantou515041,GuangdongProvince,ChinaJia-LinFeng,DepartmentofInformation,theSecondAffiliatedHospital,MedicalCollegeofShantouUniversity,Shantou515041,GuangdongProvince,ChinaSupportedbyScienceandTechnologyDepartmentofGuangdongProvince,No.2003C30307Correspondenceto:Ling-FeiWu,DepartmentofGastroenterology,theSecondAffiliatedHospital,MedicalCollegeofShantouUniversity,Shantou515041,GuangdongProvince,China.lingfeiwu@21cn.comReceived:2005-06-28Accepted:2005-07-15AbstractAIM:TodeterminetheexpressionofnuclearfactorkappaB(NF-κB)inhumangastricprecancerouslesionsandcarcinomaanditscorrelationwithCagA+Hpyloriinfection.METHODS:TheexpressionofNF-κBp65wasdetectedbyimmunohistochemistry(SABCassay),andHpyloriwereexaminedusing14C-breathtest,rapidureasetestandWarthin-Starrystaininginpatientswithchronicsuperficialgastritis(CSG:n=34),intestinalmetaplasia(IM:n=31),atypicaldysplasia(AD:n=34)andgastriccancer(GC:n=55).SerumCagAIgGantibodywasdetectedbydotimmunogoldfiltrationassay.ThecorrelationsofNF-κBp65expressionwithCagA+Hpyloriinfectionaswellasthehistologicaltypes,clinicopathologicalstagesandlymphnodemetastasiswereanalyzed.RESULTS:TheexpressionofNF-κBp65inCSG,IM,AD,GCwas15.0%,41.9%,64.7%,and78.2%,respectively,andthereweresignificantdifferencesbetweenthem(χ2=43.98,P0.01).TheratesofHpyloriinfectionwere70.0%,67.7%,73.5%,and54.5%,respectively,andtherewerenosignificantdifferencesbetweenthem(P0.05).ThepercentageofCagA+Hpyloriinfectionwere53.6%,61.9%,68.0%,and73.3%,respectively,andtherewerenosignificantdifferences(P0.05).InIM,thepositiverateofNF-κBp65expressioninHpyloriorCagA+HpyloripositivepatientsweresignificantlyhigherthanthatinpatientswithoutHpyloriinfectionorwithCagA-Hpyloriinfection(57.1%,76.9%vs10%,25.0%,P0.05).InGCpatients,thepositiveexpressionofNF-κBp65wascorrelationwiththeTstages(χ2=5.91,P0.05)andlymphnodemetastasis(χ2=7.47,P0.01),butnotwiththepathohistologicaltypes(P0.05).CONCLUSION:NF-κBisconstitutivelyactivatedinhumangastricprecancerouslesionsandcarcinomatissueandcorrelateswithtumorprogression.TheearlyactivationmayberelatedtoCagA+Hpyloriinfection.KeyWords:NuclearfactorkappaB;CagA+Hpylori;Gastriccancer;PrecancerouslesionsLiGP,WuLF,PuZJ,FengJL,ZhengZM,WangBZ.IncreasedexpressionofNF-κBp65inCagA+Hpylorigastricprecancerouslesionsandcarcinoma.ShijieHuarenXiaohuaZazhi2005;13(17):2064-2068摘要目的:探讨核因子-κB(nuclearfactor-KappaB,NF-κB)在癌前病变及胃癌组织中的表达及其与细胞毒素相关抗原A幽门螺杆菌(CagA+Hpylori)感染之间的关系.方法:慢性浅表性胃炎34例,肠腺化生31例,不典型增生34例,胃癌55例,应用免疫组化方法(SABC法)检测NF-κBp65的表达,以14C-呼气试验、快速尿素酶试验和Warthin-Starry银染色检测Hpylori,采用斑点金免疫渗滤法检测患者血清抗HpyloriCagAIgG抗体,分析NF-κBp65表达与CagA+Hpylori感染之间、以及与胃癌组织学分型、临床病理分期、淋巴结转移的关系.IncreasedexpressionofNF-κBp65inCagA+Hpylori-relatedgastricprecancerouslesionsandcarcinomaGuo-PingLi,Ling-FeiWu,Ze-JinPu,Zong-MaoZheng,Bing-ZhouWangWorldChinJDigestol2005September15;13(17):2064-2068世界华人消化杂志ISSN1009-3079CN14-1260/R2005年版权归世界胃肠病学杂志社李国平,等.CagA+幽门螺杆菌胃癌前及癌变中NF-κB的表达增强2065结果:在慢性浅表性胃炎、肠腺化生、不典型增生和胃癌组中,NF-κBp65阳性表达率分别为15.0%,41.9%,64.7%和78.2%,呈逐渐增高趋势,各组间有显著性差异(χ2=43.98,P0.01);Hpylori感染率分别为70.0%,67.7%,73.5%和54.5%,各组间无显著性差异(P0.05).CagA+Hpylori构成比分别为53.6%,61.9%,68.0%和73.3%,各组间无显著性差异(P0.05).在肠化组中,Hpylori阳性和CagA+Hpylori感染的患者NF-κBp65阳性表达率分别为57.1%和76.9%,显著高于同组无Hpylori感染的10.0%(χ2=6.18,P0.05)和CagA-Hpylori感染者的25.0%(χ2=5.45,P0.05).在胃癌组中,NF-κBp65阳性表达与T分期(χ2=5.91,P0.05)及淋巴结转移有关(χ2=7.47,P0.05),但与胃癌组织学分型无关(P0.05).结论:NF-κB的异常活化在胃癌前病变及癌变过程中起作用,早期的活化与CagA+Hpylori感染有关.关键词:核因子-κB;CagA+Hpylori;胃癌;癌前病变李国平,吴灵飞,蒲泽锦,冯家琳,王炳周,郑宗茂.CagA+幽门螺杆菌胃癌前及癌变中NF-κB的表达增强.世界华人消化杂志2005;13(17):2064-2068引言幽门螺杆菌(Hpylori)感染是慢性活动性胃炎的主要病因,是萎缩性胃炎肠上皮化生和不典型增生等癌前病变的促进因素[1,5].流行病学调查资料表明,Hpylori感染者发生胃癌的危险性较非感染者6倍[6],但确切机制仍不清楚.核因子-κB(nuclearfactorkappaB,NF-κB)作为一种多向转录调节因子[7],广泛参与多种生理和病理过程的基因调控[8,11],最近发现它在肿瘤发生发展中亦起重要作用[12,15],但有关在胃癌发病中的作用报道尚少.有文献报道,表达细胞毒素相关抗原A的Hpylori(CagA+Hpylori)可上调NF-κB的表达[16].我们研究胃癌及癌前病变中NF-κB的表达以及Hpylori,尤其是CagA+Hpylori的感染状态,旨在探讨二者之间的相互作用关系及其对胃癌发生发展的影响.1材料和方法1.1材料2002-5/2004-12我院胃癌患者55例,男30例,女25例,年龄32-77(平均62.4)岁.高分化癌25例,中分化癌13例,低分化癌11例,黏液腺癌6例.T1期2例,T2期11例,T3期29例,T4期13例.淋巴结转移40例,无淋巴结转移15例.所有患者术前均未行化疗或放疗.胃镜取材活检标本中慢性浅表性胃炎40例,慢性萎缩性胃炎伴肠化31例,不典型增生34例,患者均经病理组织学诊断证实.胃黏膜活检标本取自胃窦或病变区,手术标本均取癌灶及癌旁2cm组织,采用40g/L多聚甲醛固定,常规脱水、石蜡包埋,备测.取胃窦部黏膜作快速尿素酶试验、Warthin-starry银染色结合14C-呼气试验,其中2项阳性定为Hpylori感染.微量胶囊法14C-呼气试验所需试剂由深圳养和生物科技公司提供,按说明书检测样品每分钟衰变数(dmp),≥200dmp为(+),≤150dmp为(-);Warthin-Starry银染色按常规组织病理学技术进行,深棕色细长弯曲为Hpylori染色.CagA+Hpylori检测采用斑点金免疫渗滤法.试剂盒购自西
本文标题:CagA+幽门螺杆菌胃癌前及癌变中NF-κB的表达增强
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