中药复方对X线照射小鼠T淋巴细胞亚群和抗氧化能力的作用

目的：通过观察X线照射后小鼠T淋巴细胞亚群和抗氧化酶的变化，探讨辐射小鼠抗氧化酶和T淋巴细胞亚群的相互关系及中药养阴抗毒散的放射防护作用机理。方法：采用间接免疫荧光法和流式细胞仪测定小鼠外周血T淋巴细胞亚群，采用化学比色法测定总抗氧化能力（T－aoc)、过氧化氢酶（Cat)、超氧化物歧化酶（SOD）及丙二醛（MDA）。结果：和正常对照组比较，两个照射组CD4、CD8亚群的比例无显著下降（P＜0．01），照射对照组CD4／CD8小于正常对照组（P＜0．01）；照射中药组CD4亚群比例及CD4／CD8均高于照射对照组（P＜0．01），CD8亚群比例两者无显著差异。与正常对照组比较，照射对照组的抗氧化能力或酶类均显著降低（P＜0．01，P＜0．05），而丙二醛显著升高（P＜0．01）；照射中药组仅有过氧化氢酶下降（P＜0．01），丙二醛也显著升高（P＜0．01）；照射中药组与照射对照组比较，过氧化氢酶升高（P＜0．01），而丙二醛降低（P＜0．01）。结论：养阴抗毒散对X线照射小鼠T淋巴细胞亚群的减少有一定改善，它可能通过提高小鼠抗氧化能力达到此作用。

Effect of Traditional Chinese Medicine compound on T lymphocyte subsets and an-tioxidation of mice radiated with X-ray

Objective:To explore the mechanism of traditional Chinese medicine compound (Yang Yin Kang Du powder) in radioprotection.To study the relationship between T lymhocytes and antioxidation of mice radiated with X ray.Methods:T lymphocyte subset of in peripheral blood mice was determined by indirect immunofluorescence and flow cytometer.To T AOC,Cat,SOD and MDA were anoly zedby chemical colorimetry.Results:Compared with the normal group,the percentage of CD4 and CD8 in two irradiated groups declined significantly( P <0 01),the ratio of CD4/CD8 in the brine group was lower than the normal group's.The percentage of CD4 subset and the ratio of CD4/CD8 in the group treated with Yang Yin Kang Du powder were higher than that in the brine group.Compared with normal group,the antioxidation capacity or antioxidases decrease sinificantly( P <0 01, P <0 05) but MDA increases significantly( P <0 01) in group.In the group treated with Yang Yin Kang Du powder only catalase decreases significantly ( P <0 01) and MDA increases significantly ( P <0.01).Compared with brine group,catalase is higher and MDA is lower significantly ( P <0.01).Conclusion:Yang Yin Kang Du powder can improve the decline of T lymphocyte subsets in radiated mice with X ray.The effect may be obtained by enhancing mice's antioxidation capacity.