幽门螺旋杆菌对慢性胃炎患者粘膜内D细胞及生长抑素mRNA表达的影响

目的　了解幽门螺旋杆菌 (Hp)感染与慢性胃炎患者胃窦粘膜内D细胞及生长抑素mRNA+ 细胞 (DmRNA+ 细胞 )减少的关系。　方法　免疫细胞化学和原位杂交技术。　结果　正常组D细胞与Hp- 胃炎组无差别(P >0 0 5 ) ,但Hp+ 胃炎组D细胞显著减少 ,与Hp- 胃炎组相比有显著性差异 (P <0 0 1)。DmRNA+ 细胞 ,Hp+ 胃炎组也低于其他 2组且有显著性差异 (P <0 0 1)。　结论　Hp+ 胃炎组内D细胞及DmRNA+ 细胞减少与Hp感染有密切关系。它能减少D细胞分泌的生长抑素对G细胞分泌的影响 ,但是生长抑素基因的转录和蛋白的合成依然运行。     

大鼠实验性胃溃疡自愈期间胃窦粘膜G、D细胞变化的免疫组织化学研究

本实验用成年雄性Wistar大鼠53只,分为溃疡组、盐水对照组和正常对照组。在手术后4、10,14、21及28天分批取材。用Sternberger PAP法进行免疫组织化学染色,分别显示胃窦粘膜胃泌素细胞(G细胞)和生长抑素细胞(D细胞),观察大鼠实验性胃溃疡自愈期间,G和D细胞的形态变化,并进行了细胞计数和统计学分析。本文结果表示,溃疡组G细胞数量在术后10至14天明显增多(P<0.01),21、28天趋于减少,但仍高于对照组。有些G细胞排列成群,密集呈明显带状。正常时G细胞分布在幽门腺的中、下1/3处,而溃疡组可见有些G细胞分布在腺的上部。D细胞数量仅在术后10天增多(P<0.01),与正常对照组相比差异显著。用免疫组织化学双重染色法,可见G细胞和D细胞之间存在着形态上的接触。溃疡自愈期间,G/D细胞比值未见明显改变。本实验结果提示,胃窦粘膜局部G、D细胞的变化和大鼠实验性胃溃疡自愈修复之间有着一定的联系。     

大鼠实验性胃溃疡期间胃窦粘膜胃泌素细胞的免疫组织化学和放射自显影研究

成年雄性Wistar大鼠16只,分为实验溃疡组和对照组,后者又分为盐水组和空白组。在手术后4、6、10和21天取胃窦粘膜,经离体~3H-TdR掺入,用免疫组织化学和放射自显影方法观察胃泌素细胞(G细胞)的变化。正常大鼠胃窦粘膜G细胞标记指数为1.59±0.78,细胞百分率为4.27±0.27。溃疡组G细胞标记指数在手术后4天比对照组降低,10天的比对照组增高;G细胞百分率在手术后4、6、和10天低于对照组,21天的则高于对照组;经统计学处理,其中21天的G细胞百分率与4或6天的相比有显著性差异。溃疡组手术后6天的新生粘膜内出现G细胞,其数目随时间增加。6、10和21天的新生粘膜内可见少量~3H-TdR标记的G细胞。G细胞形状有多种,有的G细胞伸出突起,与幽门腺其他腺细胞接触。本研究结果提示,在大鼠实验性胃溃疡修复期间,G细胞可能与其他内分泌细胞共同参与了机体自然抗病活动。     

广州市健康儿童和成人淋巴细胞亚群数量的对比分析

目的比较儿童和成人淋巴细胞亚群百分率和绝对数量的异同,更好地为本地区临床诊断和治疗提供参考。方法采用双色流式细胞术分析健康儿童和成人外周血T淋巴细胞亚群(CD3+细胞、CD3+CD4+细胞、CD3+CD8+细胞)、B淋巴细胞(CD19+)、CD3-CD56+NK细胞(自然杀伤细胞)的数量。结果儿童组总淋巴细胞(百分率和绝对数)、CD19+淋巴细胞(百分率和绝对数)、CD3+淋巴细胞百分率、CD3+CD4+淋巴细胞百分率、CD3+CD8+淋巴细胞绝对数、CD3-CD56+细胞绝对数、CD4+/CD8+细胞比值与成人组比较差异均有统计学意义;CD3+CD8+淋巴细胞百分率、CD3-CD56+细胞百分率、CD3+淋巴细胞绝对数和CD3+CD4+淋巴细胞绝对数与成人组比较差异无统计学意义。儿童组CD3+CD8+淋巴细胞、CD19+淋巴细胞、CD3-CD56+细胞的百分率和绝对数均高于成人组,CD3+淋巴细胞(百分率和绝对值)、CD3+CD4+淋巴细胞(百分率和绝对值)和CD4+/CD8+细胞比值低于成人组。相同与不同性别组内均有多个指标存在显著差异。结论淋巴细胞亚群的分布受年龄、性别因素的影响,淋巴细胞亚群绝对数与百分率随年龄的变化不总是保持一致的。用于血液性和免疫性疾病诊断时,采用淋巴细胞亚群绝对数作为参考指标优于百分比率。     

HIV原发感染者自然杀伤样T细胞NKG2A/NKG2D变化的研究

目的深入了解人类免疫缺陷病毒(human immunodeficiency virus,HIV)原发感染者(primary HIV infection,PHI)NKT样细胞表面NKG2A/NKG2D受体表达的变化。方法选取25例未经高效抗逆转录病毒治疗的HIV原发感染者和27例HIV抗体阴性健康对照,用流式细胞仪检测研究对象外周血NKT样细胞表面NKG2D和NKG2A的表达。结果 HIV原发感染者NKT样细胞绝对数和百分率显著低于健康对照(P<0.01)。HIV原发感染者NKT样细胞表面NKG2A、NKG2D受体表达与健康对照并无显著差异。HIV原发感染者病毒调定点低组NKG2A+NKT样细胞、NKG2A+NKG2D-NKT样细胞以及NKG2A+NKG2D+NKT样细胞百分率均显著低于病毒调定点高组(P<0.05);NKT细胞绝对数和百分率、NKG2D+NKT样细胞、NKG2D+NKG2A-NKT样细胞百分率在两组间相似,没有显著性差异。NKG2A+NKT细胞的百分比与病毒载量正相关(R=0.430,P=0.032)。结论 NKT样细胞数量以及其表面NKG2A受体的表达可作为HIV疾病进程的预测指标之一。     

γδT细胞与哮喘特异性致敏原皮下脱敏疗法的研究

目的　探讨支气管哮喘γδT细胞与特异性致敏原脱敏疗法的关系 ,了解γδT细胞在哮喘发病机制中的作用。方法　应用卵清蛋白 (OVA)致敏并刺激Wistar大鼠 ,制作致敏大鼠哮喘模型 ;再用OVA皮下注射脱敏 ;观察脱敏前后OVA激发反应 ,测定气道反应性 (PC50 ) ;肺组织切片做HE染色观察炎症改变和做原位杂交检测IL 4mRNA和IFN γmRNA表达 ,并采用免疫组化法检测肺组织中γδT细胞数量 ;用ELISA法检测血清IL 4和IFN γ浓度 ,用流式细胞术检测PBMC和支气管肺泡灌洗液 (BALF)中γδTCR阳性T细胞百分率。结果　在脱敏组 (C组 ) ,用脱敏前激发浓度的OVA激发不再有明显哮喘发作 ,支气管肺内嗜酸细胞 (Eos)消失、过敏性炎症消除 ,其PC50 与对照组 (即D组和E组 )比较差异均有显著性 (均为P <0 .0 1)、而与正常组 (即A组 )比较差异无显著性 (P >0 .0 5 ) ;C组肺内IL 4mRNA表达及血清IL 4浓度均明显低于D、E组 (均为P <0 .0 1) ,而C组肺内IFN γmRNA表达及血清IFN γ浓度均明显高于A、D、E组 (均为P <0 .0 1) ;与此同时 ,C组肺组织内及BALF中γδT细胞数量则明显低于D、E组 (P <0 .0 1或P <0 .0 5 )。结论　特异性致敏原皮下脱敏疗法能纠正哮喘TH1 TH2反应失衡 ,同时伴随肺内及外周血γδT细胞异常分布的恢复 ,提示γδT     

胃缺血-再灌注损伤对胃窦黏膜D细胞内生长抑素含量的影响

目的:研究胃缺血-再灌注损伤(gastric ischemia-reperfusion injury,GI-RI)对大鼠胃窦黏膜D细胞内生长抑素(somatostatin SS)含量的影响。方法:实验组大鼠分为单纯缺血组(ISO)、GI-R1 h、6 h、24 h和72 h组(I／R1-4),用免疫组织化学法及图像分析法对SS进行定量研究。结果:正常大鼠胃窦黏膜中D细胞主要分布于幽门腺的中、下1／3处,形态多样;而ISC组和I／R1组D细胞多为圆形,很少见有长的胞质突起;在I／R2-4组,则可见D细胞形态多样,并可见分布于幽门腺上1／3处。ISC组和I／R1组D细胞的数目显著少于对照组,细胞平均灰度值极显著大于对照组;而I／R2-4组D细胞的数目均显著多于对照组,仅I／R2组细胞平均灰度值极显著低于对照组。结论:胃窦黏膜中D细胞的形态数量及细胞内SS的含量在大鼠GI-RI过程中有变化,提示SS参与了GI-RI过程。     

不同化疗药物对小鼠学习记忆功能的影响比较

目的:研究比较阿霉素、环磷酰胺联合使用以及单独注射5-氟尿嘧啶(5-FU)或阿霉素(DOX)对正常小鼠认知功能的影响。方法:成年雄性C57/BL小鼠随机分为正常(Control)组、阿霉素(D)组、5-氟尿嘧啶(5-FU)组、阿霉素与环磷酰胺联合(D+C)组。各组小鼠每周腹腔注射1次化疗药物,连续注射3周。采用旷场实验、新位置识别实验评价各组小鼠行为学变化;尼氏染色观察各组小鼠海马CA1和CA3区神经元变化。结果:行为学检测发现,与Control组相比,D+C组小鼠运动速度、活动距离、在中心区域活动时间及频率均无明显差异,新位置识别时间比则显著下降(P 0. 01); D组及5-FU组新位置识别时间比则明显减少(P 0. 05)。尼氏染色显示较Control组,D+C组小鼠海马CA1区和CA3区神经元均显著减少(P 0. 01),排列稀疏;而D组(P 0. 01)及5-FU组(P 0. 05)仅在海马CA3区出现神经元细胞数量降低。较D+C组,D组小鼠海马CA1区细胞数明显增多(P 0. 05)。结论:相较于单一使用阿霉素或5-氟尿嘧啶,阿霉素与环磷酰胺联合使用可以在短时间内造成小鼠严重认知功能障碍。     

十二指肠胃反流与胃窦十二指肠消化间期移行性复合运动关系的研究

目的　探讨十二指肠胃反流 (Duodenogastricre flex)发生与胃窦十二指肠消化间期移行性复合运动(migratingmotercomplex ,MMC)的关系。方法　对 2 0名 (男 9名 ,女 11名 ,平均年龄 2 9± 2 7岁 )健康志愿者进行同步胃内pH值和胆红素吸光值 (Abs)持续监测 ,并进行长时 (8— 12小时 )胃窦十二指肠压力测定。结果　 2 0例健康人进行 2 4小时胃内pH值监测和胃内胆汁监测后 ,分为 2组 :DGR阴性组 (D1) 7例 ,DGR阳性组 (D2 ) 13例。D1组MMC周期数明显增加 ,P <0 0 5 ;D2组较D1组胃窦十二指肠协调收缩明显减少 ,P <0 0 5 ;十二指肠推…     

大鼠实验性胃溃疡自愈期间胃窦粘膜D和G细胞的免疫组织化学研究

本实验用成年雄性Wistar大鼠,分为溃疡组、盐水组和对照组。溃疡组于术后4、10、14、21天分批取胃窦组织,常规石蜡包埋,制成5μm切片。用免疫组织化学PAP法分别显示胃窦胃泌素细胞(G细胞)和生长抑素细胞(D细胞)。观察溃疡期间D和G细胞的分布和形态特点,并进行细胞计数。结果表明:溃疡术后4天,D细胞数目略增加;溃疡术后10天,D细胞数目明显增多;与空白对照组相比差异显著(P<0.05)。术后14～21天,D细     

Gastrin (G) cells and somatostatin (D) cells in patients with dyspeptic symptoms: Helicobacter pylori associated and non-associated gastritis

BACKGROUND: Gastrin G cells and somatostatin D cells are important regulators of gastric acid secretion and alterations in their relative numbers may play a key role in gastroduodenal disease. AIM: To investigate the effect of Helicobacter pylori infection on the density of immunoreactive G and D cells in gastric antral and corpus biopsies from patients with dyspeptic complaints. METHODS: One hundred and twenty two patients with dyspeptic complaints had two antrum and two corpus biopsies taken during upper endoscopy. The severity of inflammation and the density of H pylori were evaluated semiquantitatively. In addition, the density and distribution of neuroendocrine cells, especially G and D cells, were examined using immunohistochemistry. Patients were divided into three groups, those with H pylori positive gastritis, H pylori negative gastritis, and histologically normal gastric mucosa. RESULTS: The number of immunoreactive G cells was significantly higher and the number of immunoreactive D cells lower in patients with H pylori positive gastritis compared with H pylori negative gastritis or histological normal gastric mucosa. The percentage of G cells as a percentage of mucosal endocrine cells was also raised and that of D cells was decreased. CONCLUSIONS: Helicobacter pylori infection produces alterations in the number of endocrine cells responsible for regulating acid secretion in relation to intragastric pH and feeding. The alterations correlate best with the severity of inflammation and not with H pylori density.     

亚硒酸钠对大鼠胃癌变前期胃窦粘膜G、D和EC细胞的影响

目的：探讨亚硒酸钠对大鼠胃癌变前期胃窦粘膜Ｇ细胞、Ｄ细胞和ＥＣ细胞的影响。方法：用免疫组织化学及图像分析法,观察亚硒酸钠对Ｎ－甲基－Ｎ’－硝基－Ｎ－亚硝基胍诱发的大鼠胃癌变前期胃窦粘膜Ｇ细胞、Ｄ细胞和ＥＣ细胞的变化。结果：Ｎ－甲基－Ｎ’硝基－Ｎ－亚硝基胍短期灌胃后（阳性对照组）,胃窦粘膜Ｇ、Ｄ、ＥＣ细胞的数量和平均光密度值（ＯＤ值）与正常对照组比较均显著减少（Ｐ〈０．０１）。Ｎ－甲基－Ｎ’－硝基－     

Light and electron microscopic immunohistochemical investigation on G and D cells in antral mucosa in Helicobacter pylori-related gastritis.

Recently, it has been recognized that Helicobacter pylori (H. pylori) infection is associated with an exaggeration of basal and meal gastrin secretion. We investigate whether there is a relationship between H. pylori-related chronic gastritis and G-cell and D-cell number and granule density index of G and D cells. - The number of antral G cells and D cells and granule density index of D and G cells are compared between thirty two patients with H. pylori-related chronic gastritis and twelve patients without H. pylori and inflammation. Antral mucosal biopsy specimens are examined using light and electron immunohistochemical techniques. - The number of G cells is the same in either infected or uninfected patients (98.40 +/- 11.39, 109.25 +/- 12.76 vs 101.17 +/- 7.72 for infected patients with non atrophic and with mild atrophic chronic gastritis and uninfected controls, respectively) except for the cases with moderate gastric mucosal atrophy, where G cells (58.22 +/- 5.63) decrease in number. The number of D cells is decreased in all patients with H. pylori-related gastritis. G cell granule density index is significantly (p < 0.05) increased in patients with H. pylori-related chronic gastritis than in controls (3.15 +/- 0.43 vs 2.528 +/- 0.01). D cell granule density index is similar between patients with H. pylori chronic gastritis and controls (3.18 +/- 0.05 vs 3.166 +/- 0.12). It is concluded that decreased D cells number in patients with H. pylori-related chronic gastritis might be one of the reasons for the existing hypergastrinaemia.     

胎儿胃肠道胃泌素细胞与生长抑素细胞的免疫组织化学研究

本文用PAP免疫组织比学法和间接免疫荧光组织化学法,对60例8～38周胎儿胃肠粘膜中胃泌素细胞(G细胞)和生长抑素细胞(D细胞)的发生进行了研究。这两种细胞最早出现于8～9周胎儿十二指肠上皮中,但在固有膜及肌层未观察到。12周后,D细胞出现在胎儿胃肠全长粘膜,G细胞则只见于胃窦及小肠粘膜。本文还对各时期胎儿胃肠粘膜中D细胞和G细胞的分布、数量,以及二者比例变化等进行了观察。胃窦中G细胞与D细胞一样,基底部伸出突起,可能具有旁分泌功能。除胃底腺外,其余部位的D细胞和G细胞多为开放型细胞。本文对这两种细胞在胎儿胃肠发育中的可能功能进行了讨论,并与成人胃窦和十二指肠上部粘膜中G、D细胞的比例进行了对比观察。     

Helicobacter pylori and chronic gastritis in the gastric biopsy material in a group of randomly selected adult inhabitants of Estonia

The occurrence of Helicobacter pylori (HP) was examined in 227 subjects randomly selected among the Estonian population of town Kuressaare. HP was present in 166 subjects (73%). In cases of normal mucosa both in antrum and body HP was lacking. If normal gastric body mucosa was associated with antral gastritis HP was found in both regions. More often the contamination of antral and body mucosa with HP occurred in case of superficial gastritis. In subjects with atrophic gastritis the occurrence of HP decreased. The frequency of HP was high (58%) already in the age group of 15-19 years and increased to 83% at the age of 20-29 years. In subjects over 60 years it decreased due to the development of atrophic gastritis.     

Morphologic features of the gastric mucosa in systemic lupus erythematosus and antiphospholipid syndrome

Morphology of gastric mucosa is characterized in the presence of Helicobacter pylori (HP) and Herpes viruses (HSV-1 and CMV). A total of 85 patients were examined (20 patients with primary APS and 65 with SLE). Chronic active gastritis was revealed in 85% patients with APS and 96% with SLE. 60% patients with APS and 45% with SLE had mucosal erosions. HP was detected in 70-87% of cases. Mixed infection of the gastric mucosa was observed in all the groups which was significantly associated with increased fibroblast and plasma cell number in the tunica propria. Tissue eosinophilia of the antral part of the stomach was observed in 39% of SLE patients. Glucocorticoid therapy was not associated with erosions and was combined with vascular thrombosis of gastric mucosa.     

Helicobacter pylori and gastro-duodenal pathology

Helicobacter Pylori (HP) were found in 878 (73%) of 1205 patients undergoing upper G-I endoscopy with multiple biopsies for gastroduodenal diseases. HP were present in similar percentages among patients with active (89%) or healed (81%) peptic ulcer as well as in non ulcerous dyspeptics affected with gastritis (85%). 96% of active chronic gastritis were infected by HP as compared with 55% of quiescent gastritis. Antral gastritis was more frequently active in patients with ulcer diseases (76%) than in dyspeptic and asyntomatic patients (50%). Healed gastric and duodenal ulcers showed decreased incidence of active antral gastritis (69) as compared with active ulcers. Conversely body gastritis was more frequently active in healed (37%) than in overt (18%) duodenal ulcers. 95 histologically normal stomachs as well as 9 cases exhibiting type A gastritis were devoid of HP. High rates of infection were found in 610 cases of chronic gastritis without atrophy as well as in 151 atrophic antral (type B) gastritis. Cytoplasmic vacuolization and swelling of foveolar-superficial cells with adhering bacteria, micropapillae and microerosions were commonly found in HP-infected mucosa. In 16 of 19 children with type B chronic gastritis antibacterial therapy eradicated HP. This was followed by resolution or striking improvement of gastritis and disappearance of epithelial lesions.     

下颌下腺切除对大鼠胃窦粘膜G,D细胞影响的免疫组织化学研究

用免疫组织化学方法观察了下颌下腺切除后，胃窦粘膜胃泌素细胞和生长抑素细胞的分布、形态和数量及Ｇ／Ｄ细胞比值的变化。结果表明：下颌下腺切除可致Ｇ、Ｄ细胞的分布、数量和Ｇ／Ｄ细胞比值发生明显变化，这可能提示下颌下腺与Ｇ、Ｄ细胞之间有功能上的联系。