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光气中毒致肺泡上皮细胞线粒体结构和功能损伤的研究

龙  子1,孔德钦2,海春旭2,*,王  欣2,*   

  1. 第四军医大学学员一旅四营十三连,陕西  西安  710032
  • 收稿日期:2014-10-03 修回日期:2014-12-25 出版日期:2015-01-31 发布日期:2015-01-31
  • 通讯作者: 海春旭,E-mail: Cx_hai@fmmu.edu.cn;王 欣,E-mail: xinwang@fmmu.edu.cn
  • 作者简介:龙 子,E-mail:zi_long11@163.com
  • 基金资助:

    军队青年基金资助(13QNP124)

Study on phosgene-induced damage of pulmonary mitochondria

LONG Zi1,KONG Deqin2,HAI Chunxu2,*,WANG Xin2,*   

  1. The Thirteenth Company, the Fourth Battalion, First Brigade, Fourth Military Medical University, Xi’an 710032
  • Received:2014-10-03 Revised:2014-12-25 Online:2015-01-31 Published:2015-01-31

摘要:

目的: 研究光气中毒对肺泡上皮细胞线粒体结构和功能的损伤作用。方法:30只SD大鼠随机分为正常对照组和染毒组,每组各15只。正常对照组以空气为对照。染毒组给予光气(10 g/m3 )动态染毒5 min,构建光气致急性肺损伤模型。染毒后2 h麻醉,采集肺组织样本,测定肺组织湿/干比,进行肺组织病理检测和电镜观察,并测定肺组织线粒体酶复合物活性。结果:与对照组比较,光气染毒后,肺湿/干比显著增加(P<0.01),肺组织存在炎细胞浸润和肺泡上皮细胞损伤;线粒体明显肿胀,形态改变,甚至固缩溶解,数量减少,线粒体嵴断裂和缺失,线粒体酶复合体活性降低(P<0.05)。结论:肺泡上皮细胞线粒体损伤为光气中毒的主要毒作用靶点之一,本研究结果为光气中毒防治提供了新思路。

关键词: 光气, 急性肺损伤, 线粒体, 中毒

Abstract:

OBJECTIVE: To study the toxicological effects of phosgene on pulmonary mitochondria. METHODS:30 SD rats were randomly divided into two groups,with 15 in each group. The rats in control group were exposed to air. The rats in phosgene group were exposed to 10 g/m3 phosgene for 5 min. Two hours after exposure,pulmonary tissues were collected,HE staining and transmission electron microscope were used to identify histological changes. Activities of mitochondrial complexes were determined. RESULTS:Phosgene induced a significant increase of pulmonary wet/dry ratio. After phosgene poisoning,there were profuse neutrophil infiltration and pulmonary alveoli epithelial cell damage. Mitochondria were notably swollen,and even appeared contracted and dissolved. The number of mitochondria was significantly decreased. Mitochondrial ridge was broken and absent. The activities of mitochondrial complex were significantly reduced. CONCLUSION:Mitochondria were main targets of phosgene poisoning,and the results provided basis for the development of new drugs in the treatment of phosgene poisoning.

Key words: phosgene, acute lung damage, mitochondria, poisoning