亚硒酸钠及抗氧化剂抑制小鼠肺泡Arthus血管炎发生的机制

目的　以小鼠肺泡血管炎动物模型为研究对象,证明亚硒酸钠及其它抗氧化剂,可通过抑制补体—中性粒细胞（ＰＭＮ）—活性氧（ＲＯＳ）正反馈活化环的机制抑制炎症反应。方法　以牛血清白蛋白致敏昆明小鼠建立肺泡Ａｒｔｈｕｓ反应性血管炎（即急性肺泡炎）的动物模型,观察口服补体活化抑制剂亚硒酸钠或抗氧化剂类黄酮（ｆｌａｖｏｎｏｉｄ）和维生素Ｅ阻断补体活化正反馈环的运转,以抑制小鼠急性肺泡炎的发生（观察补体活化及释放的活性氧在炎症区ＰＭＮ上的荧光组化表现）。结果　以上３种补体活化抑制剂及抗氧化剂能在不同程度上抑制小鼠肺泡Ａｒｔｈｕｓ血管炎的发生,尤以３ 种抗氧化剂联合应用效果更佳,其抑制率可达７５％ （Ｐ＜ ０．０１）。结论　亚硒酸钠抑制补体的活化、类黄酮及维生素Ｅ的抗氧化作用可以通过抑制补体活化反馈机制控制炎症应答,从而进一步证明了补体—ＰＭＮ—ＲＯＳ正反馈活化环促进炎症反应机制的存在

The inhibitory effect of selenite and other antioxidants on the complement mediated experimental pulmonary alveolitis

Objective To test the regulatory effect of selenite and other antioxidants on complement PMN activation feedback mechanism mediated inflammatory response in experimantal pulmonary vasculitis. Methods Mouse model of pulmonary Arthus reaction vasculitis developed with BSA sensitization and antigen inhalation was used for tests of inhibitory effect of oral administration of sodium selenite, glycyrrhizin flavonoids and/or vitamin E on the incidence of developing vasculitis, which could reflect the modulation of inflammatory response and tissue injury. Results A remarkable inhibitory effect of selenite or combined flavonoid and vitamin E on the induction of pulmonary vasculitis were observed as the incidence of vasculitis could drop from 100% of the untreated group down to 25% of the antioxidants treated groups, revealing modulation of inflammatory response. Conclusions It indicated a newer insight into mechanism of the inflammatory response could give a novel approach to the modulation of inflammatory response. An adjuvant therapy of selenium and antioxidants to the interventions of inflammatory disorders has been expected.