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首页> 外文期刊>World Journal of Gastroenterology >Lead exposure increases oxidative stress in the gastric mucosa of HCl/ethanol-exposed rats
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Lead exposure increases oxidative stress in the gastric mucosa of HCl/ethanol-exposed rats

机译:铅暴露会增加HCl /乙醇暴露的大鼠胃黏膜的氧化应激

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AIM: To investigate the role of reactive oxygen species in the ulcer-aggravating effect of lead in albino rats.rnMETHODS: Albino Wistar rats were randomly divided into three groups and treated orally with 100 mg/L (low dose) or 5000 mg/L (high dose) of lead acetate for 15 wk. A third group received saline and served as control. At the end of wk 15, colorimetric assays were applied to determine the concentrations of total protein and nitrite, the activities of the oxidative enzymes catalase and superoxide dismutase, and lipid peroxidation in homogenized gastric mucosal samples.rnRESULTS: Exposure of rats to lead significantly increased the gastric mucosal damage caused by acidified ethanol. Although the basal gastric acid secretory rate was not significantly altered, the maximal response of the stomach to histamine was significantly higher in the lead-exposed animals than in the unexposed control group. Exposure to low and high levels of lead significantly increased gastric lipid peroxidation to 183.2% ± 12.7% and 226.1% ± 6.8% of control values respectively (P < 0.0). On the other hand, lead exposure significantly decreased catalase and superoxide dismutase (SOD) activities and the amount of nitrite in gastric mucosal samples.rnCONCLUSION: Lead increases the formation of gastric ulcers by interfering with the oxidative metabolism in the stomach.
机译:目的:研究活性氧在白化病大鼠铅加重溃疡中的作用。方法:白化Wistar大鼠随机分为三组,口服100 mg / L(低剂量)或5000 mg / L (高剂量)醋酸铅15周。第三组接受盐水并作为对照。第15周结束时,采用比色法测定均质胃黏膜样品中总蛋白质和亚硝酸盐的浓度,过氧化氢酶和过氧化歧化酶的氧化酶的活性以及脂质过氧化作用。酸化乙醇引起的胃粘膜损害。尽管基础胃酸的分泌率没有显着改变,但铅暴露动物的胃对组胺的最大反应明显高于未暴露对照组。暴露于低和高水平的铅会显着增加胃脂质过氧化,分别达到对照值的183.2%±12.7%和226.1%±6.8%(P <0.0)。另一方面,铅暴露显着降低了胃粘膜样品中的过氧化氢酶和超氧化物歧化酶(SOD)活性以及亚硝酸盐的含量。结论:铅通过干扰胃的氧化代谢而增加了胃溃疡的形成。

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