幽门螺杆菌L型感染对胃癌BGC-823细胞增殖的影响

目的:研究幽门螺杆菌L型(helicobacter pylori L-form,Hp-L型)感染对胃癌BGC-823细胞增殖的影响,并探讨其作用机制。方法:将胃癌BGC-823细胞与Hp-L型以不同比例(1:20、1:100、1:500)共培养,以不加Hp-L型为对照组,在不同时段进行以下实验:倒置显微镜观察细胞形态学变化;四甲基噻唑氮蓝(MTT)法检测细胞生长增殖率;流式细胞仪(FCM)检测细胞凋亡率;免疫组化(SP法)检测癌基因(skp2)、抑癌基因(p53)和核增殖指数(Ki-67)的表达情况。结果:Hp-L型作用BGC-823细胞后,倒置显微镜观察到细胞分裂增多,增殖旺盛,瘤巨细胞增多,出现明显的生长加速现象;MTT法测定细胞生长曲线显示,Hp-L型对胃癌BGC-823细胞增殖有促进作用;FCM检测可见,Hp-L型影响胃癌BGC-823细胞周期的分布,使G0/G1期比例降低,S期比例升高;免疫组化可见细胞中Skp2、p53和Ki-67蛋白表达阳性率逐渐增加;以上作用均呈细菌浓度和作用时间依赖性。结论:Hp-L型可促进胃癌BGC-823细胞增殖,其机制与上调Skp2、p53和Ki-67蛋白的表达有关。     

胃癌组织中Sonic Hedgehog表达及其与NF-kappaB的关系研究

目的探讨Hedgehog在胃癌及其癌前病变中的表达及与NF-kappaB的关系。方法选择50例萎缩性胃炎、46例肠化生和57例胃癌患者的胃黏膜内镜活检样本,同时选择30例正常人作为对照;分为萎缩性胃炎组、肠化生组、胃癌组和正常黏膜组。通过病理学检测患者Hpylori感染状况。免疫组化法检测Hedgehog和NF-kappaB在不同阶段胃癌组织中的表达差异。流式细胞仪分析各组胃黏膜细胞的周期分布和凋亡率。Western blot检测Hedgehog表达。结果在胃癌的发展过程中,胃黏膜组织中Hedgehog表达水平先降低后升高。NF-kappaB表达水平在正常胃组织、萎缩性胃炎和肠化生组织中无明显变化,但在胃癌组织中表达显著增强。与正常胃黏膜组织比较,萎缩性胃炎、肠化生和胃癌组织中的S期细胞比例更高。细胞凋亡率萎缩性胃炎组和肠化生组较高,而胃癌组较低。抑制NF-kappaB后,Hedgehog蛋白在胃癌组织中的表达降低。结论在胃癌的发展过程中,Hedgehog蛋白表达水平先降低后升高。H pylori感染可能通过激活NF-kappaB,继而增强Hedgehog表达,同时赋予胃癌细胞凋亡抵抗。     

青年人胃癌的临床特征分析

目的：探讨青年人胃癌的临床症状、病理特征。方法：回顾性分析41例青年人胃癌患者的发病诱因、临床特征和疗效。结果：青年人胃癌女性多发,男女之比为1∶1.56。临床首发症状以上腹部疼痛、上腹部饱胀等为主,幽门螺旋杆菌（Helicobator pylori,Hp）感染率明显高。发病部位以胃窦、胃体为主;病理类型以低分化腺癌、黏液细胞癌及印戒细胞癌为主,生长方式以BorrmannⅢ型、Ⅳ型多见。结论：青年人胃癌恶性程度高,分化低,进展速度快,预后差。早期发现、尽早实施根治手术切除是提高治愈率和生存率的关键。     

Immunoglobulin A deficiency and oral health status: a case–control study

Introduction: Immunoglobulin A (IgA) is important for mucosal health. Selective IgA deficiency (IgAD) is the most common primary immunodeficiency but its effect on oral health is unclear. The aim of this study was to investigate dental, periodontal and oral mucosal health in IgAD individuals.
Material and methods: In total, 32 adult IgAD subjects were compared with 63 randomly selected individuals. Participants answered questionnaires regarding general and oral health and underwent oral examination, including examination using the periodontal screening and recording (PSR) system and dental examination using the DMF system.
Results: The IgAD individuals had significantly more often undergone tonsillectomy (44% versus 24%, p= 0.046 ) and adenoidectomy (31% versus 8%, p= 0.003 ) compared with the controls. Furthermore, the IgAD subjects reported having pharyngitis, stomatitis and herpes labialis significantly more often. There was no significant difference in periodontal health ( mean PSR index ; 1.87 versus 1.77) or dental health ( mean DMFS ; 51.3 versus 53.7 ) between the two cohorts. A positive correlation between Helicobacter pylori infection and severity of periodontitis was found ( p= 0.036).
Conclusion: IgAD predisposes to oral mucosal infections but does not influence periodontal or dental health. This is the first controlled study to include detailed clinical history and investigations, together with full oral and dental examination, in adults with IgAD.     

慢性胃病患者口腔与胃内幽门螺杆菌基因型关系的研究

目的：明确牙周基础治疗与口腔幽门螺杆菌（Helicobacterpylori,Hp）存在的关系。分析胃Hp与口腔Hp的基因型,以明确胃与口腔的Hp是否具有同源性。方法：选择胃Hp阳性并伴菌斑Hp阳性患者（6例）的胃黏膜、菌斑样本共10份（胃黏膜4份,菌斑6份）。对比分析其中5位患者和1位家属胃和口腔PCR产物的序列。结果：胃和口腔Hp的序列相比较,相同者1例,可能相同者1例,有1～4个碱基不同者2例。1例患者及其家属口腔中均检出Hp,两者的序列有3个不同。结论：口腔中有可能同时存在多个Hp菌株,口腔Hp与胃黏膜Hp基因型相同或基本相同,口腔Hp与胃Hp感染的复发或再感染有关。     

Presence of Helicobacter pylori in supragingival dental plaque of individuals with periodontal disease and upper gastric diseases

Background

Helicobacter pylori is a Gram-negative microorganism which is able to colonize the gastric mucosa and is associated with peptic ulcer, gastric carcinoma, and gastric mucosa-associated lymphoid tissue lymphoma. Several studies have detected this bacterium in the oral cavity, suggesting it as a potential reservoir. The aim of this study was to investigate the presence of H. pylori in the oral cavity of individuals with periodontal disease and gastric diseases.

Methods

115 individuals, with mean age 49.6 (±5.8) years, were divided in 4 groups: (A) with gastric diseases and periodontal disease; (B) with gastric diseases and no periodontal disease; (C) without gastric diseases and without periodontal disease, (D) without gastric diseases and with periodontal disease. Supra and subgingival plaque samples were collected from posterior teeth of the individuals with sterile paper points, and prepared for Polymerase Chain Reaction analysis. Fisher's exact test was used for detecting statistical differences between groups (p < 0.05).

Results

H. pylori was detected in supragingival plaque of 9/36 (25%) of group A, 1/31 (0.3%) of group B, 0 (0%) of group C and 3/36 (8.3%) of group D. No subgingival samples were positive for H. pylori. There was a statistically higher prevalence of H. pylori in groups A and D when compared to B and C (p < 0.05).

Conclusion

H. pylori was detected in the supragingival plaque, but not in the subgingival plaque, of individuals with periodontal disease and upper gastric diseases. There was an association between the supragingival colonization of H. pylori and oral hygiene parameters such as the presence of plaque and gingival bleeding.     

胃炎颗粒治疗慢性浅表性胃炎临床研究

目的观察胃炎颗粒治疗慢性浅表性胃炎的临床疗效及幽门螺杆菌转阴情况。方法随机将符合诊断标准的患者分为治疗组125例和对照组62例。治疗组口服胃炎颗粒每次10g,每日3次,对照组口服三九胃泰冲剂,每次10g,每日3次,比较两组临床症状改善情况,胃镜检查、活组织检查及幽门螺旋杆菌转阴情况。结果胃炎颗粒组治愈率为67．2％,显效率26．4％,总有效率99．2％;幽门螺杆菌转阴率48．3％。对照组分别为45．2％、24．2％、80．6％、1．7％。两组比较总有效率及幽门螺杆菌转阴率差异均有统计学意义（P〈0．01）。结论胃炎颗粒治疗慢性浅表性胃炎有效。     

幽门螺杆菌与肝脏疾病的相关性研究进展

幽门螺杆菌（helicobacter pylori,Hp）是世界各地最常见的感染性病原之一,世界卫生组织将其归为一类致癌因子。Hp感染与人类胃肠疾病的关系中免疫机制最为关键,并可能参与多种胃肠外疾病的发生发展,本文简介Hp与肝脏疾病的相关性研究进展,为Hp致病机制的研究及相关疾病的防治提供新的思路。     

幽门螺杆菌感染性慢性胃炎患者血清胃泌素、生长抑素的变化

目的了解幽门螺杆菌（Helicobacter pylori,Hp）感染性慢性胃炎患者血清胃泌素、生长抑素的变化,探讨Hp引起慢性胃炎的致病机制。方法选择本院经胃镜和病理诊断的慢性胃炎患者96例,其中慢性浅表性胃炎（CSG）44例,慢性萎缩性胃炎（CAG）52例,采用放免法测定血清胃泌素、生长抑素浓度,用快速尿素酶试验和Giemsa染色检查是否存在幽门螺杆菌感染,比较CSG和CAG血清胃泌素、生长抑素水平以及合并Hp阳性感染组和Hp阴性组血清胃泌素、生长抑素水平变化。结果CAG组血清胃泌素低于CSG组（54．53±23．54）ng／Lvs（77．90±31．77）ng／L,（P〈0．01）,慢性浅表性胃炎Hp阳性组血清胃泌素高于Hp阴性组（86．34±34．35）ng／Lvs（62．53±38．25）ng/L,（P〈0．01）;而慢性萎缩性胃炎Hp阳性感染组和Hp阴性组血清胃泌素水平无差异（P〉0.05）。CAG组血清生长抑素低于CSG组（106．24±28．31）ng/Lvs（132．19±25．86）ng／L,（P〈0．01）;慢性浅表性胃炎、慢性萎缩性胃炎Hp阳性组血清生长抑素均低于同组的Hp阴性组（128．59＋29．12）ng／Lvs（145．99±32．68）ng／L;（95．35±24．88）ng／Lvs（112．36±26．35）ng/L,（P〈0．05）。结论幽门螺杆菌感染引起慢性浅表性胃炎和慢性萎缩性胃炎患者的生长抑素降低;但对于血清胃泌素,慢性浅表性胃炎患者升高,慢性萎缩性胃炎患者下降,Hp感染并不能改变慢性萎缩性胃炎的低胃泌素状态。     

长乐地区居民血清胃蛋白酶原和幽门螺杆菌抗体水平分析

[目的]分析长乐地区居民血清胃蛋白酶原（PG）含量和幽门螺杆菌（Hp）感染率,了解基本人群分布特征,探索相关影响因素。[方法]用ELISA法检测224名居民血清PGⅠ、PGⅡ含量,并计算PGⅠ/Ⅱ比值;用ELISA法检测血清Hp IgG抗体水平。[结果]长乐地区居民血清PGⅠ、PGⅡ及PGⅠ/Ⅱ中位值分别为110.8μg/L、13.9μg/L、7.9,在不同性别、不同年龄组中3者类似。Hp感染率为49.6%,感染者血清PGⅡ值（中位数为15.8μg/L）高于非感染者（11.6μg/L,P〈0.01）,但PGⅠ/Ⅱ比值（7.3）较后者低（8.5,P=0.023）。[结论]长乐地区居民血清PG水平呈明显偏态分布,与Hp感染密切相关,是否受性别、年龄影响有待进一步研究。