幽门螺杆菌相关性消化性溃疡的细胞凋亡研究

目的：探讨幽门螺杆菌（Helicobacter pylori,HP)诱导胃上皮细胞凋亡的机制及细胞凋亡在HP相关性消化性溃疡（PU）中的作用。方法：内镜下胃粘膜活检取材,应用TUNEL法检测胃上皮细胞凋亡,免疫组化法检测凋亡调控蛋白bak、bcl-2的表达。结果：HP阳性胃溃疡（GU）和十二指肠（DU）患者细胞凋亡指数（AI）明显高于HP阴性非溃疡性消化不良（NUD）患者（P＜0．01）。根除HP后,AI在DU明显下降（P＜0．01）,在GU无明显改变（P＞0．05）。HP阳性DU溃疡活动期AI明显高于愈合期和瘢痕期（P＜0．05）,而HP阳性和GU溃疡三期AI无差异（P＞0．05）。bak蛋白表达在HP阳性PU明显高于HP阴性NUD患者（P＜0．05）。根除HP后,DU患者bak蛋白表达明显降低（P＜0．05）。GU患者虽有下降,但无统计学差异。bcl-2蛋白表达在HP阳性PU与HP阴性NUD之间无显著差异,HP根除前后亦无明显改变。结论：HP诱导胃上皮细胞凋亡在十二指肠溃疡发病中起重要的作用,HP诱导胃上皮细胞凋亡可能是通过bak路径实现的。     

幽门螺杆菌免疫分型在胃十二指肠疾病中的应用价值

目的 探讨幽门螺杆菌(Hp)细胞毒素在胃十二指肠疾病中的作用及HP免疫分型的临床应用价值。方法 采用免疫印迹法检测HP感染的胃十二指肠相关疾病的CagA和VacA抗体，并给所选病例三联HP根除方案治疗后，观察其根除率。结果 ①CagA和VacA的阳性率及CagA和VacA双阳性率正常对照组显著低干DU、GU、及GC组(P＜0．05)，而CagA和VacA双阴性率显著高于DU、GU及GC组(P＜0．05)；除DU组CagA阳性率及CagA和VacA的阳性率、CagA和VacA双阳性率显著高于UND组(P＜0．05)外，其余UND、DU、GU及GC组间CagA和VacA双阳性率及双阴性率均无显著性差异(P＞0．05)。②PU较UND的HP根除率高；HP根除成功的病例中CagA阳性率显著高于CagA阴性(P＜0．01)。结论 CagA和VacA与胃十二指肠疾病发生有密切关系，但不能作为判断HP导致特异性胃十二指肠疾病的单一指标。HP免疫分型可能无助干症状及疾病的诊断。同样的根除治疗方案，CagA阳性菌的HP根除率显著高于CagA阴性菌，CagA抗体可作为预测抗菌治疗疗效的有用的指标。     

消化性溃疡发病相关因素演变的统计分析

近几十年来,消化性溃疡的流行病学特征在世界范围内发生了一些变化,但其在国人中的演变有待进一步了解.目的：研究消化性溃疡发病相关因素的演变情况.方法：对1987年1月～2003年12月在仁济医院接受胃镜检查而被诊断为消化性溃疡者的年龄、溃疡类型、幽门螺杆菌（H.pylori）感染等情况进行统计分析.将整个观察期分为1987～1990年、1991～1994年、1995～1999年和2000～2003年4个时间段作进一步分析.结果：在4个时间段中,十二指肠溃疡（DU）和胃溃疡（GU）的平均发病年龄均呈上升趋势（P＜0.01）,DU患者的平均年龄依次为42.5岁、43.6岁、44.6岁和47.4岁,GU依次为48.9岁、50.1岁、49.5岁和52.6岁.DU患者的平均年龄较GU年轻近6岁.DU与GU的总体发病人数之比介于1.84和2.99之间.男性的DU和GU检出率均高于女性,DU男女之比为1.45：1～2.59：1,GU为2.08：1～4.27：1.1997年,全体接受胃镜检查者、DU患者和GU患者的H.pylori阳性率分别为51.5%、78.5%和71.9%,至2003年则分别为31.0%、63.5%和58.0%.各组前后差异均有显著性（P＜0.01）.结论：近年来消化性溃疡,包括DU和GU的平均患病年龄有逐渐上升的趋势,患者仍以男性为主.胃镜检查者和消化性溃疡患者的H.pylori阳性率均有逐年下降的趋势.     

消化性溃疡的特点

目的为了进一步探讨消化性溃疡（PU）的特点．方法内镜检查确诊的1432例PU，从其检出率、性别、年龄、季节、分布、大小、部位、并发症等方面进行了分析．结果PU：①发病率，十二指肠明显高于胃溃疡（GU）；②年龄，GU随年龄增长而增加，60岁以后下降，十二指肠溃疡（DU）以20岁～30岁青壮年发病率高，51岁以后开始减少，平均年龄DU比GU小10岁；③性别，男性明显高于女性；④季节，GU春季发病率较低，夏秋季发病率开始上升，冬季发病率最高，DU春季和秋季发病率高，冬春季和夏季发病率相对较低；⑤大小，多为＜1．0cm；⑥部位，GU依次为胃角＞胃窦＞胃体＞胃底＞幽门管，DU下壁＞前壁＞后壁＞上壁＞球后；⑦并发症，出血较多，梗阻较少，DU多于GU．结论PU的发病与年龄、性别、季节都有一定的关系，GU与DU略有不同     

幽门螺杆菌阴性消化性溃疡的病例对照研究

背景：幽门螺杆菌（H．pylori）感染是消化性溃疡（PU）的重要病因，但H．pyZori阴性溃疡在PU中仍占有一定比例。目的：分析总结H．pyfori阴性PU的临床特点。方法：回顾性分析2004年1月-2007年3月北京大学第三医院住院PU患者的病例资料。从H．pylori阳性患者中以l：l的比例为H．pylori阴性组随机选取性别相同、年龄相近的对照，分析比较两组临床特点。结果：共纳入480例PU患者，男女比例为3．62：1；HpyZori阴性120例，阳性360例，阴性患者中位年龄显著高于阳性患者（P〈0．001）。病例对照研究显示，Hpylori阴性组首发症状存在腹痛者显著少于对照组，有恶心、呕吐症状以及有PU史和非甾体抗炎药（NSAIDs）服用史者显著多于对照组（P〈0．05）。H．pyZori阴性组胃溃疡显著多于对照组，十二指肠溃疡显著少于对照组（P〈0．05）；内镜下慢性非萎缩性胃炎显著少于对照组，息肉显著多于对照组（P〈0．05）：组织学上胃黏膜炎症、炎症程度和活动性显著轻于对照组，淋巴组织增生和肠化生显著少于对照组（P〈0．05）。结论：H．pyfo矗阴性PU占本组PU总数的25．O％，患者年龄相对较大，临床多表现为无痛性溃疡，多有PU史和NSAIDs服用史。溃疡多发生于胃部，黏膜炎症程度较轻，活动性炎症少见。     

肿瘤坏死因子-β基因多态性与胃癌和十二指肠溃疡

目的研究胃癌和十二指肠溃疡患者中的肿瘤坏死因子（TNF）-β基因多态性，并分析TNF-β基因多态性与幽门螺杆菌（H.pylori）感染相互作用与胃癌和十二指肠溃疡的关系。方法采用PCR-RFLP方法对124例胃癌、83例十二指肠溃疡及96例健康对照者进行基因多态性分析。用ELISA方法检测血清Hp抗体。结果胃癌组TNF-β＋252＊G基因频率明显低于对照组（51．2％对63．0％，P＜0．05），TNF-β＋252＊A基因频率明显高于对照组（48．8％对37．0％，P＜0．05），TNF-β＋252A／A基因型的优势比值为2．44（95％CI 1．18—5．03）。在血清H．pylori抗体阳性的胃癌组中，这种基因多态性的影响表现得更明显，优势比值为2．52。十二指肠溃疡和对照组基因频率比较差异无统计学意义（P＞0．05），十二指肠溃疡组的血清H.pylori抗体阳性率明显高于健康对照组（P＜0．01）。结论中国汉族胃癌病人与TNF-β基因多态性相关联，TNF-β＋252A／A基因型与胃癌的易感性有关；十二指肠溃疡病人与TNF-β基因多态性无关联。H．pylori感染是十二指肠溃疡的独立危险因素。     

幽门螺杆菌感染相关慢性胃病患者血清MTL与胃泌素及胃蛋白酶原含量水平表达差异性

目的探讨幽门螺杆菌(Helicobacter pylori,H.pylori)感染相关慢性胃病患者胃黏膜肥大细胞数量、血浆胃动素及胃泌素水平差异性.方法选取2015-01/2017-01在绍兴市柯桥区齐贤医院和绍兴市中心医院接受治疗的H.pylori感染胃溃疡(gastric ulcer,GU)患者74例,H.pylori感染十二指肠溃疡(duodenal ulcer,DU)患者68例,H.pylori感染慢性萎缩性胃炎(chronic atrophic gastritis,CAG)患者76例,选取同一时间段内在绍兴市柯桥区齐贤医院和绍兴市中心医院接受体检的健康人80例作为对照组(无H.pylori感染),观察组4组对象肥大细胞(mast cell,MC)数量及血清内胃动素(motilin,MTL)、胃泌素、胃蛋白酶原含量状况.结果 CAG、GU、DU组MC数量均高于对照组(16.79个/HSP±2.64个/HSP),血清MTL含量均低于对照组(307.05ng/L±56.21 ng/L),差异有统计学意义(P0.05);血清G17在DU、GU、对照组及C A G组依次降低,GU组与DU组的胃蛋白酶原(pepsinogen,PG)Ⅰ、PGⅡ、PGⅠ/Ⅱ水平均高于对照组的(199.74mg/L±80.53mg/L)、(13.72mg/L±5.75mg/L)、(14.53±5.42),CAG组PGⅠ、PGⅠ/Ⅱ均低于对照组,差异均有统计学意义(P0.05).结论 H.pylori感染通过调节血清内MTL、胃泌素和胃蛋白酶原含量来促进GU、DU和CAG患者病情发展.     

肥大细胞脱颗粒在幽门螺杆菌致病中的作用

目的 研究肥大细胞（MC）在幽门螺杆菌（H pylori)发病中的作用。方法 选胃镜检查者87例，其中诊断十二指肠溃疡（DU）33例，浅表性胃炎45例，糜烂性胃炎9例。取胃窦、体部活检分别作组织病理学（HE染色）及H pylori检查（快速尿素酶、培养及Warthin-Starry银染），免疫组织化学染色（ABC法）后分别计算粘膜及粘膜下的完整和脱颗粒MC数。结果 MC计数在H pylori阳性和H pylori阴性组间无明显差别（P＞0．05），但前者粘膜内MC脱颗粒者明显多于后者（分别为43％和23％，P＜0．01）。MC计数与粘膜炎症程度无明显关系，但在活动性炎症时显著高于非活动性炎症组（P＜0．05）。各病变组间MC计数也无显著差异。结论 MC可能在粘膜H pylori相关炎症的发生发展中起着重要作用。     

胃及十二指肠球部溃疡的内镜调查报告

目的利用内镜资料调查胃溃疡（GU）和十二指肠球部溃疡（DU）的某些临床流行病学特点．方法收集5a的内镜资料，统计GU，DU的检出率及发病季节，性别及年龄分布等特点及幽门螺杆菌的检出情况．结果5405例受检病例中共检出DU1236例，GU197例，检出率分别为22．9％和3．6％．DU检出率以1月～3月份及12月份最高（27．7％～32．0％，平均30．2％），6月～8月份最低（16．1％～16．8％，平均17．2％，与1月～3月份及12月份平均检出率比较，P＜0．01）．GU的检出率无明显季节差异（P＞0．05）．DU，GU的男女之比分别为5．43：1和3．40：1，男女性检出率分别为26．8％和12．7％（P＜0．01），3．9％和3．0％（P＞0．05）．40岁以上者GU检出率为6．5％（其中60岁以上者为9．1％），40岁以下者为2．6％（与40岁以上者比较，P＜0．01），而DU的检出率无明显年龄差异．214例溃疡患者胃粘膜尿素酶试验阳性率为76．6％，其中DU为77．6％，GU为72．5％．结论DU的发病与季节气候有关，冬春季较夏秋季更易发病；GU发病与季节无关．DU和GU均以男性多发，其检出率男性明显高于女性．GU多见于40岁以上患者，而且年龄愈大检出率愈高；DU的检出率无年龄差异．     

幽门螺杆菌抗体检测分析

目的 对昆明地区感染幽门螺杆菌(H.pylori)人群检测血清CasA、VacA、Ure、Hsp60、RdxA五种IgG抗体,了解其与消化性溃疡、慢性胃炎的关系.方法 抽静脉血3 mL离心取血清,用H.pylori抗体芯片检测CagA、VacA、Ure、Hsp60、RdxA五种IgG抗体.结果 ①CagA抗体总阳性率为79.7%,十二指肠球部溃疡(DU)、慢性胃炎(CG)、胃溃疡(GU)的CagA抗体阳性率分别为88.0%、60.9%、83.3%,DU的CagA抗体检出率明显高于CG(P=0.008),而DU与GU(P=0.744)、CG与GU(P=0.633)之间的差异无统计学意义;②VacA抗体总阳性率为20.3%,DU、CG、GU的VacA抗体阳性率分别为14.0%、30.4%、33.3%.三者之间的差异无统计学意义(P=0.12);③Ure抗体总阳性率为97.5%,DU、CG、GU的Ure抗体阳性率分别为98%、95.7%、100%,三者之间的差异无统计学意义(P=0.534);④Hsp60抗体总阳性率为6.25%,DU、CG、GU的Hsp60抗体阳性率分别为4.0%、13.0%、0%,三者之间的差异无统计学意义(P=0.317);⑤RdxA抗体总阳性率为17.5%,DU、CG、GU的RdxA阳性率分别为14.0%、30.4%、0%,三者之间的差异无统计学意义(P=0.179).结论 昆明地区H.pylori感染人群CagA抗体阳性率为79.7%,与DU的关系更加密切;CasA、VacA抗体不能单独作为H.pylori感染阳性的标志物;Hsp60抗体水平对于H.priori感染的检测价值不大;RdxA抗体水平不能标志甲硝唑耐药的水平;而Ure抗体阳性率高达97.5%,可作为H.priori感染阳性的标志物,我们认为检测H.pylori血清抗体用于H.pylori感染的流行病学调查,应该以Ure抗体为主,辅以CagA抗体和VacA抗体.     

Association of CagA and VacA presence with ulcer and non-ulcer dyspepsia in a Turkish population

AIM: The mostly known genotypic virulence features of H. pylori are cytotoxin associated gene A (cagA) and Vacuoliting cytotoxin gene A (VacA). We investigated the association of these major virulence factors with ulcer and non-ulcer dyspepsia in our region. METHODS: One hundred and forty two dyspeptic patients were studied (average age 44.8+/-15.9 years, range 15-87 years, 64 males and 78 females). Antral and corpus biopsies were taken for detecting and genotyping of H. pylori. 107 patients who were H. pylori positive by histological assessment were divided into three groups according to endoscopic findings: Duodenal ulcer (DU), gastric ulcer (GU) and non-ulcer dyspepsia (NUD). The polymerase chain reaction (PCR) was used to detect CagA and VacA genes of H. pylori using specific primers. RESULTS: H. pylori was isolated from 75.4 % (107/142) of the patients. Of the 107 patients, 66 (61.7 %) were cagA-positive and 82 (76.6 %) were VacA-positive. CagA gene was positively associated with DU and GU (P<0.01, P<0.02), but not with NUD (P>0.05). Although VacA positivity in ulcer patients was higher than that in NUD group, the difference was not statistically significant (P>0.05). CONCLUSION: There is a significantly positive association between CagA genes and DU and GU. The presence of VacA is not a predictive marker for DU, GU, and NUD in our patients.     

胃十二指肠疾病与血浆激素关系的初步研究

对64例胃十二指肠疾病患者(包括慢性残表性胃炎23例,萎缩性胃炎5例,胃溃疡10例,十二指肠溃疡14例及胃癌12例)的血浆生长抑索(SS)、血管活性肠肽(VIP)、胃动素(MTL)及血清胃泌素(Gas)的研究表明,血浆SS水平在胃十二指肠溃疡组及胃癌组均低于正常对照组(P<0.001);血浆VIP浓度在胃溃疡时升高最明显,与正常组及各疾病组比较均有显著性差异(P<0.01);十二指肠溃疡及胃癌组的血浆MTL含量均高于正常对照组(P<0.05);血清Gas水平在浅表性胃炎和萎缩性胃炎时均高于正常对照组(P<0.01).     

Anti-CagA and anti-VacA antibodies in Helicobacter pylori-infected patients with and without peptic ulcer disease in Serbia and Montenegro

BACKGROUND: The expression of two Helicobacter pylori proteins, CagA and VacA, is associated with more severe pathogenesis and clinical outcomes of the infection. However, this association varies among geographical regions and ethnic groups. We therefore evaluated CagA and VacA seroprevalence in H. pylori-positive dyspeptic patients in Serbia and Montenegro. METHODS: In 173 consecutive dyspeptic patients referred to endoscopy (67M, mean age 49 +/- 15, 76 smokers), immunoblot assay was used to detect serum antibodies against CagA and VacA. Presence of H. pylori infection was assessed using a rapid urease test (RUT), routine histology and serology (anti-IgG ELISA). Duodenal ulcer (DU) was diagnosed in 28, gastric ulcer (GU) in 3 and non-ulcer dyspepsia (NUD) in the remaining 142 patients. RESULTS: 129 (74.6%) patients were H. pylori-positive, 27 (96.4%) with DU, 3 (100%) with GU and 99 (69.7%) with NUD (P < 0.01); 121 (93.8%) patients carried anti-CagA antibodies and there was no difference between the DU and NUD groups. VacA antibodies were detected in sera of 50 (38.75%) and were more prevalent in patients with DU compared to the NUD group (P < 0.05). CONCLUSIONS: In Serbia and Montenegro there is high seroprevalence of CagA-positive H. pylori strains in dyspeptic patients with and without peptic ulcer, while VacA-positive strains are more closely related to peptic ulcer disease.     

Do Japanese and Swedish peptic ulcer patients respond differently to Helicobacter pylori eradication therapies and what are their histological features?

BACKGROUND: As a consequence of gastric histological differences, Japanese and Swedish peptic ulcer (PU) patients may respond differently to Helicobacter pylori eradication therapies. METHODS: The study was single-blind and compared four eradication therapies in Japanese and Swedish patients with healed gastric (GU) or duodenal (DU) ulcer. Swedish patients received either (a) omeprazole+clarithromycin (OC, where O = 20 mg, C = 500 mg) for 2 weeks, or triple therapy with (b) omeprazole + amoxicillin + clarithromycin (OAC-L where O = 20mg, A = 1 g, C = 250 mg); (c) OAC-H (where O = 20 mg, A-1 g, C-500 mg); or (d) omeprazole + metronidazole + clarithromycin (OMC, where O = 20 mg, M = 400 mg, C = 250 mg) for 1 week. Antibiotic doses were weight-adjusted downwards in Japanese patients. H. pylori was assessed using the urea breath test (UBT), histology and culture pre-entry, with UBT being repeated 4 and 8 weeks after stopping treatment. Histology and culture were repeated if the UBT was positive post-therapy. RESULTS: Recruitment included 120 patients from Japan (43 GU, 61 DU, 16 GU+DU) and 120 from Sweden (119 DU, 1 GU+DU). There were 26 exclusions from a FAS analysis due to H. pylori negativity (14), no drug administration (7) or no data after visit 1 (5). Eradication rates (FAS) from Japan were (a) 63%, (b) 93%, (c) 96% or (d) 96%, and for Sweden (a) 92%, (b) 86%, (c) 93% or (d) 96%. Dual therapy was less effective in patients with gastric atrophy associated with GU disease. Tolerability was good in all treatment groups, with no serious adverse events. CONCLUSION: Triple therapies were safe and effective for H. pylori eradication in Japanese and Swedish peptic ulcer patients. Dual therapy was significantly less effective in the Japanese patients, half of whom had a history of GU and more abnormal histology than in the Swedish patients, all of whom had DU.     

Th response to Helicobacter pylori differs between patients with gastric ulcer and duodenal ulcer

OBJECTIVE: Helicobacter pylori (H. pylori) infection induces both gastric (GU) and duodenal ulcers (DU). We examined whether host immunological response to H. pylori determines different disease outcomes. MATERIAL AND METHODS: Thirty-two GU and 28 DU patients infected with H. pylori, and 24 dyspeptic patients without infection were enrolled. The constituents of cellular infiltrates in biopsies from each patient were determined and lymphokines secreted by stimulated T cells were measured. Serum concentrations of IgG subclasses specific to H. pylori were measured. RESULTS: Low pepsinogen I and high pepsinogen II levels were observed in GU patients, while a high pepsinogen I level was found in DU patients. T cells predominate over other cell types in both GU and DU patients. GU patients had a higher number of T cells (p < 0.01) and lower plasma cells (p < 0.05) than those in DU patients. T cells from GU patients produced greater amounts of IFN-gamma and less IL-4 than those in DU patients (p < 0.01). GU patients had a higher serum level of IgG2 specific to H. pylori than that in DU patients (p < 0.01). CONCLUSIONS: Th response by gastric T cells in GU patient was more polarized to Th1 as compared with that in DU patients, suggesting that a distinct immune response to H. pylori induces different disease outcomes.     

Recurrence of Helicobacter pylori infection and the long-term outcome of peptic ulcer after successful eradication in Japan.

Recurrence of peptic ulcer after successful eradication of Helicobacter pylori is closely associated with reinfection. The aim of this study was to examine the recurrence of peptic ulcer and reinfection with H. pylori after successful eradication. To eradicate H. pylori infection, patients with active peptic ulcer disease were assigned to two treatment groups depending on the year of their enrollment (AM group and OAMR group). Patients in the AM group received 400 mg of cimetidine twice per day, 300 mg of amoxicillin three times per day, and 250 mg of metronidazole three times per day for 2 weeks. Patients in the OAMR group received 20 mg of omeprazole once per day, 500 mg of amoxicillin granules three times per day, 250 mg of metronidazole three times per day, and 150 mg of roxithromycin twice per day for 1 week. After endoscopy verified ulcer scarring and successful eradication of H. pylori infection, study patients were followed up monthly and did not undergo acid-suppressive therapy. Endoscopy was performed at 6-month intervals for the 1st year. After the 1st year, follow-up endoscopies were performed annually. In total, 107 patients with peptic ulcer (duodenal ulcer [DU], 65; gastric ulcer [GU], 42) were followed up for a mean period of approximately 2 years. Recurrence of infection occurred in 10 (9.3%) of 107 patients (AM group, 9; OAMR group, 1) after 210 patient-years of follow-up; the recurrence rate was 4.8% per patient-year. Recurrence of H. pylori infection was significantly higher in the AM group (23.1%) than in the OAMR group (1.5%). H. pylori infection recurred in two patients 6 months after eradication therapy, in seven 1 year after, and in one 2 years after. Thereafter, no further cases of H. pylori recurrence were observed. During follow-up periods, seven cases of ulcer recurrence were observed (DU, 4; GU, 3). The rate of peptic ulcer recurrence within 2 years after eradication therapy was significantly higher than that after more than 2 years. Four cases of ulcer recurrence (DU, 3; GU, 1) also had recurrence of H. pylori infection. One recurrent case of DU without reinfection was associated with nonsteroidal anti-inflammatory drugs. The remaining two cases of GU recurred without H. pylori reinfection. In conclusion, peptic ulcer recurrence rarely occurred (3 [2.9%] of 103) in patients cured of H. pylori infection. Reinfection after apparent successful eradication was rarely noted when a powerful therapeutic regimen in eradication was used. Therefore, to eradicate H. pylori, a highly effective therapeutic regimen should always be used.     

消化性溃疡患者血中神经降压素水平及其在不同状态下的变化

本文对61例消化性溃疡患者空腹血浆神经降压素(Neurotensin,NT)水平作了测定,并就其在溃疡出血、幽门螺杆菌感染、奥美拉唑治疗后等多种状态下的进一步改变作了观察。结果表明溃疡患者NT水平显著低于正常(P<0.01),并发出血患者NT水平也明显低于正常(P<0.05),幽门螺杆菌感染、奥美拉唑治疗后血中NT水平未受显著影响(P>0.05)。     

Clinical relevance of Helicobacter pylori CagA-positive strains: gastroduodenal peptic lesions marker.

OBJECTIVES: peptic ulcer is characterized by its recurrent nature, which necessitates maintenance treatment in most patients. But this natural history can be changed in patients with peptic ulcer associated to Helicobacter pylori, as shown by the low rates of recurrence and decreased hemorrhagic recidivism associated with this infection. Whether CagA or VacA strains are associated with a greater risk of peptic ulcer is controversial. This study was designed to examine endoscopic findings and their relation with H. pylori phenotype (CagA or VacA). METHODS: 106 selected dyspeptic patients underwent upper gastrointestinal tract endoscopic examination between September 1996 and May 1997 [69 with H. pylori (Hp) and 37 without this infection]. Endoscopic findings were classified as gastric ulcer (GU), duodenal ulcer (DU), gastric erosions (GE), duodenitis (Du), chronic gastritis (CG) and normal mucosa (NM). Hp phenotype was analyzed with a western blot test. RESULTS: 75% of H. pylori strains were CagA-positive and 54.2% were VacA-positive. 82.4% of the cases of DU were associated with a CagA+ phenotype, but the association was not statistically significant. Otherwise 100% of gastric ulcers were associated with CagA+ strains (p < 0.005). VacA phenotype was not associated with any particular endoscopic finding. Peptic ulcer (DU or GU) was also associated with the CagA+ phenotype (p < 0.05). CONCLUSIONS: the CagA+ H. pylori phenotype seems to be a peptic lesion marker, but was more frequently related with GU than with DU in our sample of Spanish patients.     

消化性溃疡中胃粘膜病变的特点分析

分析４９１例消化性溃疡伴随胃溃膜病变的特点。结果：性别年龄因素对病变发生率无影响。粘膜炎症较之萎缩和溃疡关系更密切。十二指溃肥广泛粘膜炎症及体部慢性轻度炎症为特点；胃溃疡以广泛萎缩，窦部重度萎缩及重度慢性活动性炎症为特点。两者粘膜病变特点和现有关于两者发病机理的认识相吻合。     

Prevalence and genetic diversity of cagD, cagE, and vacA in Helicobacter pylori strains isolated from Japanese patients

BACKGROUND: Although cagD and cagE (cagDE) identified upstream of cagA have been shown to be involved in the induction of interleukin (IL)-8 expression, the relationship between cagDE status and gastroduodenal diseases still remains to be examined. Thus we investigated prevalence and genetic diversity of cagD, cagE, and vacA in Helicobacter pylori strains isolated from patients with peptic ulcer or gastritis. METHODS: We analyzed 73 H. pylori strains isolated from Japanese patients (gastritis (GA), 15; gastric ulcer (GU), 28; duodenal ulcer (DU), 23; GU and DU, 7). The presence of cagDE was evaluated by polymerase chain reaction (PCR) and Southern hybridization. The vacA genotype was examined by PCR, using type-specific primers. RESULTS: cagDE was present in 13 (86.7%) of 15 patients with GA, 26 (92.9%) of 28 patients with GU, 21 (91.3%) of 23 patients with DU, and 6 (85.7%) of 7 patients with GU and DU (P = 0.89). vacA signal sequence type s1 was found in 14 (93.3%) of 15 patients with GA, 26 (92.9%) of 28 patients with GU, 22 (95.7%) of 23 patients with DU, and 6 (85.7%) of 7 patients with GU and DU (P = 0.84). Sequences of cagDE and vacA in our Japanese strains were highly homologous with one another, and there were no disease-specific mutations. CONCLUSIONS: Most of the H. pylori strains in Japan were cagDE-positive, vacA s1 type, regardless of clinical outcome. The present study also indicated that these genes were conserved well among our H. pylori isolates.