癌变·畸变·突变 ›› 2019, Vol. 31 ›› Issue (1): 41-44,48.doi: 10.3969/j.issn.1004-616x.2019.01.007

• 论著 • 上一篇    下一篇

发烟饼烟雾急性暴露对大鼠血清氧化应激的影响

郭海东1,2, 杨润芳1, 刘馨钰3, 刘军军2, 何瑾2, 甘子琼2, 李宏霞1   

  1. 1. 四川大学华西医院, 四川 成都 610041;
    2. 应急管理部四川消防研究所, 四川 成都 610036;
    3. 四川大学建筑与环境学院, 四川 成都 610041
  • 收稿日期:2018-05-28 修回日期:2018-12-11 出版日期:2019-01-31 发布日期:2019-01-31
  • 通讯作者: 李宏霞,E-mail:hxl9998@sohu.com E-mail:hxl9998@sohu.com
  • 作者简介:郭海东,E-mail:guohaidong1119@126.com。
  • 基金资助:
    应急管理部四川消防研究所基本科研业务专项(20188804Z);公安部技术研究计划面上项目(2017JSYJC34)

Oxidative stress response in rats after exposure to fire-drill prop smoke

GUO Haidong1,2, YANG Runfang1, LIU Xinyu3, LIU Junjun2, HE Jin2, GAN Ziqiong2, LI Hongxia1   

  1. 1. West China Hospital, Sichuan University, Chengdu 610041;
    2. Sichuan Fire Research Institute, Ministry of Emergency Management, Chengdu 610036;
    3. College of Architecture & Environment, Sichuan University, Chengdu 610041, Sichuan, China
  • Received:2018-05-28 Revised:2018-12-11 Online:2019-01-31 Published:2019-01-31

摘要: 目的:探讨发烟饼烟雾急性暴露后大鼠血清氧化应激指标的变化情况,为其毒性评价提供基础依据。方法:40只SD大鼠随机分为5组,即烟雾染毒结束后1 h、6 h、24 h、7 d和空白对照组,每组8只,雌雄各半。选用市售白色发烟饼,按《GB/T 20285-2006材料产烟毒性危险分级》设计的产烟装置进行产烟和对大鼠染毒之后股动脉采血,采用试剂盒测定血液中还原型谷胱甘肽(GSH)、丙二醛(MDA)、超氧化物歧化酶(SOD)水平的变化情况,并对大鼠气管和肺作HE染色组织病理学检查。结果:与对照组相比,发烟饼烟雾染毒结束后,各组动物出现明显的神经系统及呼吸系统损伤症状,染毒后7 d组动物体质量在第3天降低(P < 0.05),第5天后缓慢恢复(P > 0.05),组织病理学检查可见气管和肺明显炎性损伤。染毒后6 h、24 h、7 d组大鼠血清中GSH浓度分别为1.177、1.109、1.076 ng/mL,与空白对照组(1.506 ng/mL)相比均明显降低(P < 0.05或P < 0.01);染毒后7 d组大鼠血清中MDA浓度为1.008 nmol/mL,与空白对照组(0.751 ng/mL)相比明显升高(P < 0.01);染毒后24 h和7 d组大鼠血清中SOD浓度分别为1.294、1.260 ng/mL,与空白对照组(1.594 ng/mL)相比均显著降低(P < 0.05)。结论:发烟饼烟雾急性暴露会对大鼠造成明显损害,血清中氧化应激指标变化明显,氧化应激反应可能是其重要的损伤机制。

关键词: 发烟饼, 烟雾, 氧化应激, 吸入性损伤

Abstract: OBJECTIVE:To investigate changes of serum oxidative stress index in rats after their exposure to fire drill prop smoke. METHODS:40 rats were divided randomly into five groups:1 unexposed and 4 exposure groups with each group investigated at 1,6,24 and 168 h after the exposure. Exposures were carried out in a smoke producing device according to the GB/T 20285-2006 Classification of Smoke Toxicity Risk of Material. Blood samples were collected from femoral arteries to detect changes of GSH,MDA and SOD. Trachea and lung tissues were collected and stained by HE staining for histopathological examinations. RESULTS:After exposure,rats showed obvious injury symptoms in the nervous and respiratory systems. In addition,their weights were reduced,to a significant level for the 168 h group. Histopathological examination revealed significant inflammatory damage to the tracheas and lungs. Serum GSH concentrations of rats in the 6,24 and 168 h groups at 1.177,1.109 and 1.076 ng/mL,respectively,were significantly lower than those in the blank control group (P < 0.05 or P < 0.01). The serum MDA concentration in the 168 h group was 1.008 nmol/mL,which was significantly higher than that of the blank control group (P < 0.01). The serum SOD concentrations in the 24 and 168 h groups were 1.294 and 1.260 ng/mL,respectively,which were significantly lower than those in the blank control group (P < 0.05). CONCLUSION:Acute exposure to fire drill prop smoke can cause significant damage to the body. In addition,the oxidative stress index in serum changed obviously. Thus,oxidative stress reactions may be an important injury mechanism for excessive fire drill prop smoke exposure.

Key words: fire drill prop, smoke, oxidative stress, inhalation injury

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