幽门螺杆菌感染患者胃液和血液抗坏血酸及脂质过氧化物的改变

流行病学调查提示幽门杆菌感染与胃癌有关，但有不同的报道。为此，我们测定敢７５例ＨＰ阳性和ＨＰ阴性病人的胃液和血液抗坏血酸、ＣｕＺｎＳＯＤ及ＭＤＡ水平，２０例正常人为对照。结果表明：ＨＰ阳性组胃液抗坏血酸、ＣｕＺｎＳＯＤ水平显著低于ＨＰ阴性组和正常对照组（Ｐ＜０．０５）；ＭＤＡ含量明显增高，差异有显著性（Ｐ＜０．０５）。胃液ＣｕＺｎＳＯＤ和ＭＤＡ水平呈显著相关（Ｐ＜０．０５）。胃癌病人胃液、血液抗坏     

肝硬化及肝癌患者血清CuZn—SOD的放免测定及临床意义

用ＲＩＡ法测定６２例肝硬变、３０例肝癌和２０例正常人的血清ＣｕＺｎ－ＳＯＤ含量。结果肝硬变组的均值显著低于正常组及肝癌组（Ｐ均＜０．０１）。按Ｃｈｉｌｄ－Ｐｕｇｈ分级，肝硬变组ＣｕＺｎ－ＳＯＤ含量随病情好转有所回升，与其肝功能储备呈负相关（Ｐ＜０．０５）。肝癌组ＣｕＺｎ－ＳＯＤ＞４５０ｎｇ／ｍｌ者，ＡＦＰ阳性组和阴性组ＳＯＤ增高的阳性率近似（Ｐ＜０．０５）。提示血清ＣｕＺｎ－ＳＯＤ的ＲＩＡ测定有助     

胃窦粘膜及胃液中生长抑素胃泌素含量与幽门螺杆菌相关性胃炎关系的研究

本文对３９例ＨＰ（＋），２３例ＨＰ（－）的慢性浅表性胃炎患者及８例正常对照组的胃窦粘膜组织及胃液经胃镜取材后用放射免疫分析方法（ＲＩＡ）分别测定了胃泌素、生长抑素含量。研究结果显示：①胃窦粘膜组织ＳＳ水平在ＨＰ（－）胃炎组显著高于ＨＰ（＋）胃炎组（Ｐ＜０．０１）而与正常组比较无显著性差异（Ｐ＞０．０５）。ＨＰ（＋）胃炎组较正常组ＳＳ水平为低（Ｐ＜０．０５）；②胃液ＳＳ水平在ＨＰ（－）胃炎组显著高于ＨＰ（＋）组（Ｐ＜０．０１）与正常组比无显著性差异（Ｐ＞０．０５）；③胃窦粘膜ＧＳ水平在ＨＰ（＋）组与ＨＰ（－）组及正常组之间比较均无统计学差异（Ｐ＞０．０５），而胃液ＧＳ水平在ＨＰ（＋）组显著高于ＨＰ（－）组（Ｐ＜０．０１）及正常组（Ｐ＜０．０５）；④组织ＳＳ水平与胃液ＳＳ水平呈正相关（ｒ＝０．２９８４，Ｐ＜０．０５），与胃液ＧＳ水平呈负相关（ｒ＝－０．３８６０Ｐ＜０．００１）。研究结果表明，ＨＰ感染胃窦粘膜可致其组织及胃液ＳＳ水平降低，胃液ＧＳ水平增高。提示：ＨＰ感染可能抑制了胃窦Ｄ细胞的功能，ＨＰ感染可使Ｇ细胞的腔分泌功能增强。     

自由基在实验性胃癌及癌前病变发生中的作用

目的探讨自由基在胃癌及其癌前病变发生中的作用．方法将１００只Ｗｉｓｔａｒ大鼠分为２组，实验组（７０只），给予１００ｍｇ／Ｌ甲基硝基亚硝基胍（ＭＮＮＧ）水溶液自由饮用３０ｗｋ，对照组（３０只）饮用自来水．选５个时相点，动态观察ＭＮＮＧ诱发实验性胃癌及其癌前病变过程中大鼠体内丙二醛（ＭＤＡ）、脂质过氧化物（ＬＰＯ）、谷胱甘肽过氧化物酶（ＧＳＨＰＸ）及超氧化物歧化酶（ＳＯＤ）等的变化情况．结果在实验组，ＭＤＡ平均含量在５２ｗｋ非常显著地大于０ｗｋ（Ｐ＜００１），并显著地大于１６ｗｋ以前（Ｐ＜００５）．胃癌组织ＭＤＡ含量显著高于胃癌癌前病变组织（Ｐ＜００５）．癌组织ＬＰＯ的含量显著高于癌前病变组织（Ｐ＜００５）．实验组，总ＳＯＤ和ＣｕＺｎＳＯＤ活性在５２ｗｋ明显低于１６ｗｋ之前（分别为Ｐ＜００５和Ｐ＜００１）．癌组织ＣｕＺｎＳＯＤ含量非常显著地小于正常胃粘膜（Ｐ＜００１），亦明显低于胃粘膜异型增生和肠上皮化生（Ｐ＜００５）．在３０ｗｋ和５２ｗｋＧＳＨＰＸ活性显著低于１６ｗｋ以前．结论自由基在实验性胃癌及其癌前病变发生中具有一定作用，自由基清除剂可能对胃癌的综合防治具有积极意义     

紫外线照射自血回输对肺心病患者血液抗氧化能力的影响

为进一步探讨紫外线照射自血回输（ＡＵＶＩＢ）对肺心病急性加重期患者辅助治疗的机理，对４８例肺心病患者ＡＵＶＩＢ治疗前后血液中超氧化物歧化酶（ＳＯＤ）、丙二醛（ＭＤＡ）、谷胱甘肽过氧化物酶（ＧＳＨ－Ｐｘ）、过氧化氢酶（ＣＡＴ）活性进行了检测，并以正常人作对照。结果发现：肺心病患者ＳＯＤ水平虽高于正常对照组，但无显著差异（Ｐ＞００５），ＭＤＡ含量显著高于正常对照组（Ｐ＜００１），而ＧＳＨ－Ｐｘ与ＣＡＴ活性明显低于正常对照组（Ｐ＜００５）。经ＡＵＶＩＢ辅助治疗后，ＧＳＨ－Ｐｘ与ＣＡＴ活性显著升高（Ｐ＜００５），ＭＤＡ水平显著降低（Ｐ＜００５）。说明ＡＵＶＩＢ能提高肺心病患者血液抗氧化能力     

幽门螺杆菌感染对胃病细胞动力学的影响

目的　观察 Ｈｐ 感染在正常粘膜演变为胃癌过程中对细胞增殖动力学的影响,以探讨 Ｈｐ 的致癌机制．方法　研究对象为正常胃粘膜的消化不良患者（ ＮＳ,ｎ ＝ １４） 及慢性浅表性胃炎（ ＣＳＧ, ｎ ＝ ５６） 、慢性萎缩性胃炎（ ＣＡＧ,ｎ ＝ ２０） 、慢性萎缩性胃炎伴肠上皮化生（ＣＡＧＩＭ ,ｎ ＝ １６） 、不典型增生（Ｄｙｓ ,ｎ ＝ １８） 、胃癌（ ＧＣ,ｎ ＝ １７） Ｈｐ 阳性与阴性患者．应用Ｋｉ６７ 免疫组化技术评价胃幽门窦上皮细胞增生,并用标记指数百分率（ＬＩ％ ） 来表示．结果　Ｈｐ 阳性患者（ ｎ ＝ ７５） 的Ｋｉ６７ ＬＩ％ 为１７ ±５ , Ｈｐ 阴性患者（ ｎ ＝ ５２ ） 的 Ｋｉ６７ ＬＩ％ 为 １３ ±６ , 差异有 显著 性（ Ｐ＜ ０－０５） ;伴有 Ｈｐ 感染的ＣＳＧ 与ＮＳ 或 Ｈｐ 阴性的ＣＳＧ 患者相比ＬＩ％ 增加（ Ｐ＜ ０－０１） ;ＣＡＧ,ＣＡＧＩＭ ,Ｄｙｓ ,ＧＣ 的 Ｈｐ 阳性与阴性患者的ＬＩ％ 相比无显著差异;五种胃病无论 Ｈｐ 阳性或阴性患者与正常者相比,ＬＩ％ 明显增加（ Ｐ＜ ０－０１） ． ＬＩ％ 与胃粘膜炎症程度无关．结论　Ｈｐ 感染促进胃上皮细胞过度增殖主要发生在胃粘膜病变的早期,并不影响在癌前病变或胃癌患者中所     

恒定磁场对小鼠自由基相关成分的影响

目的观察恒定磁场对小鼠ＳＯＤ、ＧＳＨ、ＧＳＨ－Ｐｘ、ＭＤＡ的影响。方法氢可组和恒磁组小鼠肌注氢化可的松１ｗ，对恒磁组小鼠曝磁１４ｄ，检测鼠组织中ＳＯＤ、ＧＳＨ、ＧＳＨ－Ｐｘ、ＭＤＡ。结果心组织Ｔ－ＳＯＤ、Ｍｎ－ＳＯＤ、Ｃｕ·Ｚｎ－ＳＯＤ氢可组比对照组均有非常显著降低（Ｐ＜０．００１），心组织Ｔ－ＳＯＤ、Ｃｕ·Ｚｎ－ＳＯＤ恒磁组比氢可组均有非常显著增加（Ｐ＜０．００１）；肝组织ＧＳＨ－Ｐｘ氢可组比对照组降低（Ｐ＜０．０５），恒磁组比氢可组有非常显著升高（Ｐ＜０．００１）；肾组织ＧＳＨ氢可组比对照组降低（Ｐ＜０．０５），恒磁组比氢可组升高（Ｐ＜０．０５）；心组织ＭＤＡ氢可组比对照组升高（Ｐ＜０．０５），恒磁组比氢可组有非常显著降低（Ｐ＜０．００１）。结论恒定磁场具有抑制自由基，增强抗氧化防御能力，在医疗保健和抗衰老领域中有重要作用。     

急性心肌梗死患者溶栓治疗前后血清一氧化氮含量变化

目的：探讨急性心肌梗死（ Ａ Ｍ Ｉ）患者血清一氧化氮（ Ｎ Ｏ）含量变化及其临床意义。方法：在２８例 Ａ Ｍ Ｉ患者接受尿激酶静脉溶栓治疗前及治疗后３ ｈ 分别测定其血清一氧化氮（ Ｎ Ｏ）、超氧化物岐化酶（ Ｓ Ｏ Ｄ）及丙二醛（ Ｍ Ｄ Ａ）的含量变化。结果：溶栓治疗后３ ｈ 的 Ｎ Ｏ、 Ｓ Ｏ Ｄ 含量较治疗前含量显著减少（ Ｐ ＜ ０．０５）。 Ｍ Ｄ Ａ 含量显著增加（ Ｐ ＜ ０．０５）。尤以冠状动脉再通组 Ｎ Ｏ、 Ｓ Ｏ Ｄ 含量减少（ Ｐ ＜ ０．０１）, Ｍ Ａ Ｄ 含量增加（ Ｐ ＜ ０．０１）更明显。而未通组在治疗前后的 Ｎ Ｏ、 Ｓ Ｏ Ｄ、 Ｍ Ｄ Ａ 含量无显著性差异（ Ｐ ＞ ０．０５）。结论： Ｎ Ｏ、 Ｓ Ｏ Ｄ 含量减少, Ｍ Ａ Ｄ 含量增加与缺血心肌再灌注损伤有关,在对 Ａ Ｍ Ｉ患者行溶栓治疗同时,应同时积极采取抗氧化治疗。     

慢性阻塞性肺疾病和肺心病患者血液动力学与循环内皮细胞变化

目的探讨慢性阻塞性肺疾病（ＣＯＰＤ）和肺心病时血循环内皮细胞、血液动力学的变化及意义。方法运用右心导管检查技术和血循环内皮细胞（ＣＥＣ）分离技术，用硫巴比妥法及羟胺法测定血丙二醛（ＭＤＡ）及超氧化物岐化酶（ＳＯＤ）。结果肺心病组肺动脉平均压［（ｍＰＡＰ）３７６±０７５ｋＰａ、血ＣＥＣ数量每０９微升为１６７０±２６５与ＣＯＰＤ组（８４８±２２３）比较，差异有显著性（Ｐ＜０．０１），血ＣＥＣ数量与动脉血氧分压（ＰａＯ２）比较呈显著负相关（ｒ＝０．９４２３，Ｐ＜０．００１），血ＣＥＣ数量与肺动脉压比较呈显著正相关（ｒ＝０．８２７０，Ｐ＜０．００１），肺心病组丙二醛（ＭＤＡ）、超氧化物歧化酶（ＳＯＤ）与ＣＯＰＤ组比较，差异有显著性（Ｐ＜０．０１）。结论缺氧可加重血管内皮细胞损伤     

胃疾患时急性时相血浆蛋白的腔分泌及肿瘤坏死因子的调控作用

用ＩＣＳ－Ⅱ免疫化学系统（Ｂｅｃｋｍａｎ）检测１８２例慢性浅表性胃炎、慢性萎缩性胃炎，十二指肠球部溃疡和胃癌患者的胃液发现，胃液中含数量不等的Ｃ反应蛋白（ＣＲＰ）、α１抗胰蛋白酶（α１ＡＴ）、α１酸性糖蛋白（α１ＡＧ）、Ｃ３和Ｃ４等急性时相血浆蛋白（ＡＰＰｓ），证明这些蛋白向胃腔内分泌－腔分泌。慢性萎缩性胃炎较浅表性胃炎或兼有十二指肠球部溃疡者显著升高（Ｐ＜０．０１），胃癌又较慢性萎缩性胃炎显著升高（Ｐ＜０．０１），胃癌术后ＡＰＰｓ明显下降（Ｐ＜０．０１）。这不仅说明ＡＰＰ可能参与疾病的发生和发展，对这些疾病的鉴别也有一定价值。胃癌患者用肿瘤坏死因子治疗后，可刺激Ⅰ型ＡＰＰ表达，使ＣＲＰ、α１ＡＧ和Ｃ３和Ｃ４显著升高（Ｐ＜０．０５），但对Ⅱ型ＡＰＰ却有抑制作用，导致α１ＡＴ下降（Ｐ＜０．０５）。这对治疗有一定指导意义。     

非溃疡性消化不良病人胃粘膜分泌维生素C的研究

目的：研究非溃疡性消化不良病人胃粘膜分泌维生素Ｃ（ＶｉｔＣ）的变化以及与幽门螺杆菌（Ｈｐ）感染、胃酸分泌、年龄和性别的关系。方法：用高铁还原法测定血浆和胃液中ＶｉｔＣ浓度，以１小时内ＶｉｔＣ从血液到胃液中的清除率代表胃粘膜分泌Ｖｉｔｃ的能力。结果：胃粘膜的ＶｉｔＣ分泌与Ｈｐ感染与否无关（Ｐ＞０．０５）：ＶｉｔＣ分泌与胃酸分泌呈明显正相关（ｒ＝０．８４），在给五肽胃泌素后，随着胃酸分泌的增加，ＶｉｔＣ分泌也增加：４０岁以上病人的ＶｉｔＣ分泌明显低于３９岁以下病人（Ｐ＜０．０１）。结论：胃粘膜的ＶｉｔＣ分泌不受Ｈｐ感染的影响：ＶｉｔＣ分泌与胃酸分泌明显相关；另外，ＶｉｔＣ分泌也与年龄有关，４０岁以上病人的Ｖｉｔｃ分泌明显减少，推测其胃癌发生率增高可能与ＶｉｔＣ分泌减少有关。     

Effect of Helicobacter pylori and its eradication on gastric juice ascorbic acid.

The presence of ascorbic acid in gastric juice may protect against gastric carcinoma and peptic ulceration. This study examined the effect of Helicobacter pylori (H pylori) on the secretion of ascorbic acid into gastric juice by measuring fasting plasma and gastric juice ascorbic acid concentrations in patients with and without the infection and also before and after its eradication. Gastric juice ascorbic acid concentrations in 19 H pylori positive patients were significantly lower (median 2.8, range 0-28.8 micrograms/ml) than those in 10 H pylori negative controls (median 17.8, range 5.6-155.4 micrograms/ml) (p < 0.0005) despite similar plasma ascorbic acid concentrations in both groups. The median gastric juice:plasma ascorbic acid ratio in the H pylori positive patients was only 1.16 (range 0.02-6.67), compared with a median ratio of 4.87 (range 0.76-21.33) in H pylori negative controls (p < 0.01). In the patients with H pylori infection there was a significant negative correlation between the severity of the antral polymorphonuclear infiltrate and gastric juice ascorbic acid concentrations (correlation coefficient -0.52, p = 0.02). After eradication of H pylori in 11 patients, gastric juice ascorbic acid concentrations rose from 2.4 (0-12.8 micrograms/ml) to 11.2 (0-50 micrograms/ml) (p = 0.01). The median gastric juice: plasma ascorbic acid ratio also increased from 1.33 (0.05-6.67) to 2.89 (0.01-166) (p = 0.01). In conclusion, the high gastric juice:plasma ascorbic acid ratio in H pylori negative subjects shows active secretion of ascorbic acid into gastric juice. Secondly, H pylori infection causes a reversible lowering of gastric juice ascorbic acid concentrations, which may predispose to gastric carcinoma and peptic ulceration.     

Ascorbic acid in the human stomach

Ascorbic acid, the reduced form of vitamin C, may protect against gastric cancer. Accordingly, this study assessed the variability of ascorbic acid and vitamin C in the gastric juice of 77 patients with dyspepsia. There was a vitamin C concentration gradient from gastric juice down to plasma in subjects with normal gastric mucosa, but not in those with chronic gastritis. Patients with chronic gastritis had significantly lower gastric concentrations of vitamin C and ascorbic acid, and ascorbic acid concentrations were especially low in subjects with hypochlorhydria. The presence of the concentration gradient suggests that a mechanism for the secretion of vitamin C into the stomach exists. This is compromised by chronic gastritis. The very low ascorbic acid concentrations in hypochlorhydria may be a consequence of oxidation by bacterial nitrite. Those patients who by the Correa model are at greatest risk for gastric cancer have the lowest gastric levels of ascorbic acid.     

环氧化酶-2在胃癌和胃炎中的表达及其与幽门螺杆菌感染的关系

目的探讨环氧化酶-2(COX-2)在胃癌和胃炎中的表达及其与幽门螺杆菌(Helicobater pylori,HP)感染的关系,为胃癌的预防和治疗提供有价值的实验和理论依据。方法2004年11月至2005年4月中国医科大学附属第一医院门诊胃镜活检标本共128例,采用免疫组化技术检测COX-2在胃癌以及各型胃炎中的表达情况。结果胃癌和萎缩性胃炎伴不典型增生组织中COX-2的表达率明显高于浅表性胃炎(P<0.05),COX-2在萎缩性胃炎伴不典型增生HP感染阳性患者中的表达率明显高于HP感染阴性患者(P<0.05),高、中分化胃癌COX-2表达率高于低分化胃癌(P<0.05)。结论COX-2在胃癌组织中存在过表达,HP感染可使萎缩性胃炎伴不典型增生组织中COX-2表达增强,COX-2表达与胃癌分化程度有关。     

Ascorbic acid and total vitamin C concentrations in plasma, gastric juice, and gastrointestinal mucosa: effects of gastritis and oral supplementation.

Epidemiological evidence suggests that high dietary ascorbic acid reduces gastric cancer risk. It may do this by either reducing N-nitroso compound formation in gastric juice, or by scavenging reactive oxygen species in gastric mucosa. The aim of this study was to discover if potential ascorbic acid protection might be increased by supplementation. Thirty two patients were supplemented with ascorbic acid, 500 mg twice daily for two weeks. Gastric juice, plasma, and upper gastrointestinal biopsy ascorbate concentrations were measured and compared with values in 48 unsupplemented patients. It was found that ascorbic acid and total vitamin C concentrations were considerably higher in biopsy specimens from oesophagus, body, antrum, duodenum, and rectum, compared with values in plasma or gastric juice. Plasma and mucosal concentrations were unaffected by the presence of chronic gastritis but gastric juice concentrations were substantially lower in patients with chronic gastritis than in patients with normal histological assessment (p < 0.01). Patients receiving ascorbic acid supplements had higher ascorbic acid concentrations in plasma (p < 0.001), gastric juice (p < 0.001), and at all biopsy sites in the upper gastrointestinal tract (p < 0.05). Gastric juice ascorbic acid and total vitamin C concentrations in gastritic patients, however, were still less after supplementation than in normal subjects (p < 0.01). These data suggest that high ascorbic acid intake could reduce gastric cancer risk, but its protective effect might be greater if gastritis is treated (for example, by Helicobacter pylori eradication).     

Vitamin C Concentration in Gastric juice before and after Anti-Helicobacter pylori Treatment

Objectives: To investigate the change of vitamin C concentration (ascorbic and debydroascorbic acid) in gastric juice after anti-Helicobacter pylori treatment, and to relate any observed change to gastric pH, inflammatory compromise of the gastric mucosa, plasma vitamin C concentration, and smoking habits. Methods: Plasma and gastric juice vitamin C, fasting gastric juice pH, gastric bistology, and smoking status were studied in 70 patients with H . pylori-associated gastritis before and after therapy. Results: Gastric juice ascorbic acid increased significantly after H. pylori clearance. For the most part, this change was confined to patients who experienced reduction of gastric pH. It was also related to improvement of the compromise of tbe gastric epithelium, reduction of the proportion of vitamin C composed by debydroascorbic acid, and increase of the gastric juice/plasma vitamin C concentration gradient. Smokers bad lower vitamin C concentrations in plasma and gastric juice before and after H. pylori clearance than nonsmokers. Conclusions: The findings are consistent with a causal association between H. pylori infection and low ascorbic acid levels in gastric juice, and support two mechanisms for this association: increased oxidation and a decreased secretion of ascorbic acid.     

胃癌雌孕激素受体表达与幽门螺杆菌感染的关系

目的 探讨胃癌雌激素受体(ER)和孕激素受体(PgR)与幽门螺杆菌(HP)感染的关系.方法:采用S-P免疫组化染色法检测64例胃癌活检组织中ER和PgR.结果:胃癌ER和PgR的阳性表达明显高于肠化生、异型增生和慢性浅表性胃炎(P<0.01);HP阳性胃癌中ER和PgR明显高于HP阴性组(P<0.01);肠化生、异型增生ER和PgR在HP阳性和HP阴性组间均无显著性差异(P>0.05).结论:胃癌中ER和PgR表达与HP感染有相关性.     

幽门螺杆菌感染与胃粘膜上皮细胞凋亡、增殖及p53基因表达探讨

目的:研究幽门螺杆菌(Helieobacter pylori,HP)感染后胃粘膜组织p53基因表达改变和细胞凋亡及增殖的变化。方法:采用脱氧核糖核酸末端转移酶介导的缺口末端标记(TUNEL)技术及免疫组织化学方法对HP阳性者根除前后及HP阴性者的胃粘膜上皮组织中的细胞凋亡、增殖及p53蛋白表达状态进行原位观察和比较。结果:慢性活动性胃炎HP感染者细胞凋亡指数和增殖指数显著高于不伴HP感染者(P<0.01),根除前后比较差异亦显著(P<0.01)。HP阳性组突变型p53阳性率显著高于HP阴性组(P<0.05)。在HP相关性胃炎中,p53阳性者的细胞增殖指数显著高于p53阴性者(P<0.05)。结论:HP可引起胃粘膜上皮细胞凋亡和增殖改变,突变型p53异常表达可能参与此过程。说明HP与胃癌发生动态过程有关系。     

Gastric juice ascorbic acid is related to Helicobacter pylori infection but not ethnicity

BACKGROUND: Maori and Pacific Island ethnic groups in New Zealand have a high risk for gastric cancer. Low levels of gastric juice ascorbic acid (vitamin C) have been suggested to be a risk factor for gastric cancer. Previous studies have shown that gastric juice ascorbic acid may be independently associated with both ethnicity and Helicobacter pylori infection. This study aimed to examine the interrelationship between H. pylori and ethnicity in New Zealand. METHODS: Gastric juice was collected into 70% perchloric acid preservative and stored at -80 degrees C. Ascorbic acid was analysed by high-performance liquid chromatography using ion-pair chromatography and electrochemical detection. Inflammation and atrophy was graded from biopsies from multiple sites in the antrum and body. Gastric juice was collected from 89 patients during routine endoscopy. RESULTS: There was a wide range of measured gastric juice ascorbic acid from 0.001 to 410 microg/mL. The median concentration of ascorbic acid for H. pylori-negative patients was 1.78 microg/mL (n = 57) and 0.12 microg/mL (n = 32) for H. pylori-positive patients (P = 0.001). Gastric juice ascorbic acid concentration was not associated with age, endoscopic diagnosis or intestinal metaplasia, but was significantly associated with the degree of acute inflammation (P = 0.01) and the presence of atrophy (P = 0.04).The median ascorbic acid concentration for European patients was 0.92 microg/mL (n = 44) and 0.09 microg/mL (n = 38) for Maori and Pacific Island ethnic groups combined (P = 0.1). Multiple step-wise regression analysis showed that only H. pylori infection was a significant factor for predicting ascorbic acid concentrations (r2 = 0.12). CONCLUSIONS: This study has confirmed that gastric juice ascorbic acid concentration is lower in the presence of H. pylori infection.     

胃病患者血清胃液胃液素、胃动素和亮-脑啡肽的变化

目的 研究胃病患者血清胃液胃液素、胃动素和亮-脑啡肽的变化及临床意义。 方法 用放射免疫法测定胃病患者(胃癌25例、胃溃疡18例和萎缩性胃炎24例)血清胃液中胃液素、胃动素和亮-脑啡肽的含量。 结果 与正常对照和胃良性疾病比较,胃癌患者血清胃液胃液素、胃动素显著升高(P<0.01),血清亮-脑啡肽含量也升高(P<0.05)。 结论 胃癌患者血清胃液胃液素、胃动素和血清亮-脑啡肽可明显升高,对胃癌诊断有一定参考价值。