【摘要】 目的研究大鼠溃疡性结肠炎（UC）血、肠黏膜中一氧化氮（NO）和超氧化歧化酶（SOD）变化及丹参对其影响。方法予雌性Sprague-Dawley大鼠含30 mg三硝基苯磺酸（TNBS）的50%乙醇溶液0.85 ml灌肠,诱导实验性溃疡性结肠炎。造模7 d后,健康对照组、模型组尾静脉注入0.9%NaCl溶液1 ml/d;丹参治疗组每天尾静脉注入丹参注射液2 ml·kg^-1·d^-1。通过肠道重量指数、溃疡面积、大体形态和组织学评分及血和肠黏膜中NO、SOD含量测定评估疗效。结果丹参治疗组肠道重量指数、溃疡面积、大体形态和组织学评分及血和肠黏膜中NO含量减少、SOD含量增高,与模型组比较差异有统计学意义（P<0.01）;但较健康对照组NO含量仍增高和SOD含量减少（P<0.05）。结论UC大鼠血、肠黏膜中NO和SOD异常,可能是UC发生和发展主要因素之一;丹参有效治疗UC与其拮抗NO、氧自由基机制有关。更多还原

【Abstract】 Objective To explore the changes of nitric oxide（NO） and superoxide dismutase（SOD） in the serun and intestine mucosal and the treatment of ulcerative colitis（UC） with tanshinon in rats,Methods 30 mg of trinitro-benzene-sulfonic acid （TNBS） dissolved in 0.85ml of 50% ethanol was administrated intrarectally in Sprague-Dawley female rats to induce experimental colitis.After 7 days,the rats were divided into normal control, 0.9% saline and treatment group tanshinon 2ml·kg^-1·d^-1 were intravenously.The therapeutic effect was evaluated by measuring the ponderal index,the surface area of the ulcers,macroscopical and histological score,activity of NO and SOD were measured in colonic tissue and serum all rats.Results Compared with the saline group,the ponderal index,the surface area of the ulcers,macroscopical and histological score,activity of NO level in the serum and intes- tine mucosal was decreased and the SOD increased of significantly in the treatment group（P<0.01）,while activity of NO level was increased and the SOD was decreased significantly in the tanshinon group compared with the normal control group（P<0.05）.Conclusion Tanshinon is effective in the treatment of UC by the antagonism of NO and SOD in rats.更多还原