空气模拟潜水后小鼠的氧化应激状态研究

目的探讨空气模拟潜水前后小鼠氧化应激状态的变化。方法48只昆明种小鼠用随机数字表法分为常压空气对照组(NA)、常氧高氮组(HN)、高压氧组(HO)、压缩空气暴露后1d组(HA1)、压缩空气暴露后3d组(HA3)以及压缩空气暴露后5d组(HA5);各组暴露于相应压力条件下,每次60min,每天2次,连续3d。相应时间点取血,检测各组丙二醛(MDA)、谷胱甘肽(GSH)、谷胱苷肽鄄S转移酶(GSH鄄Px)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)的变化情况。结果与对照组相比,纯氧组及压缩空气暴露后1d组各指标均显著变化(P<0.05,P<0.01),且在常氧高氮组与压缩空气暴露后1d组之间差异存在显著性(P<0.05,P<0.01)。上述变化在3～5d内自然恢复。结论在空气模拟潜水条件下小鼠氧化应激状态发生显著变化,高分压氧在其中扮演了极为重要的角色。小鼠腹腔巨噬细胞功能在空气模拟潜水条件下受到显著抑制可能与其自身氧化应激状态发生变化有关。

The Oxidative Stress State of Mice After Air Simulated Diving

Objective To study the oxidative stress state of mice before and after air simulated diving. Methods Forty-eight mice were divided into 6 groups randomly. Every group was exposed to corresponding pressure for 60 minutes, twice a day for consecutive 3 days. Blood was obtained at the corresponding time to observe the changes of maleic dialdehyde, glutathione, glutathione-s-transferase, glutathione peroxidase, superoxide dismutase and catalase. Results Compared with the control, the activity of glutathione-s-transferase, glutathione peroxidase, superoxide dismutase, catalase and the level of glutathione were markedly inhibited and maleic dialdehyde increased in HO group and HA1 group (P<0.05, P<0.01). There were significant discrepancies between HA1 group and HN group on every index (P<0.05, P<0.01). These changes could disappear in 3-5 days. Conclusion The oxidative stress state of mice changed obviously in simulated air diving environment and hyperbaric oxygen may play an important role in it. The changes of mice peritoneal cavity macrophages' functions in simulated air diving environment may be related to its own oxidative stress states.