癌变·畸变·突变 ›› 2026, Vol. 38 ›› Issue (2): 93-101.doi: 10.3969/j.issn.1004-616x.2026.02.002

• 论著 • 上一篇    

卡托普利对光气所致大鼠急性肺损伤的改善作用及其机制

王常艳1,2, 李佳威2, 王会3, 陈金合4, 樊振鹏2, 师敏婕1,2, 李文丽2, 张荣强1   

  1. 1. 陕西中医药大学公共卫生学院, 陕西 咸阳 712046;
    2. 空军军医大学军事预防医学系军事毒理学与防化医学教研室/陕西省自由基生物学与医学重点实验室/教育部特殊作业环境危害评估与防治重点实验室, 陕西 西安 710032;
    3. 西安医学院公共卫生学院, 陕西 西安 710021;
    4. 应急管理部化学品登记中心, 山东 青岛 266071
  • 收稿日期:2025-06-04 修回日期:2025-10-22 发布日期:2026-04-09
  • 通讯作者: 李文丽, 张荣强
  • 作者简介:王常艳,E-mail:17792032880@163.com。
  • 基金资助:
    国家自然科学基金(82373603); 陕西省教育厅重点实验室项目(2JS009)

Improvement effect of captopril on phosgene-induced acute lung injury in rats

WANG Changyan1,2, LI Jiawei2, WANG Hui3, CHEN Jinhe4, FAN Zhenpeng2, SHI Minjie1,2, LI Wenli2, ZHANG Rongqiang1   

  1. 1. School of Public Health, Shaanxi University of Chinese Medicine, Xianyang 712046, Shaanxi;
    2. Department of Military Toxicology and Chemical Defense Medicine, School of Military Preventive Medicine, Air Force Medical University/Key Laboratory of Free Radical Biology and Medicine of Shaanxi Province/Key Laboratory of Environmental Hazard Assessment and Prevention of Special Operational Environment of Ministry of Education, Xi ' an 710032, Shaanxi;
    3. School of Public Health, Xi ' an Medical University, Xi'an 710021, Shaanxi;
    4. Chemical Registration Center of Emergency Management, Qingdao 266071, Shandong, China
  • Received:2025-06-04 Revised:2025-10-22 Published:2026-04-09

摘要: 目的: 构建光气暴露诱导的SD大鼠急性肺损伤(ALI)模型,探究卡托普利对光气所致急性肺损伤的作用及其分子机制。方法: 将40只SD雄性大鼠随机分为对照组、光气染毒组、卡托普利组及光气与卡托普利联合组,每组各10只。光气染毒组和光气与卡托普利联合组经鼻腔动态吸入41 mg/m3的光气30 min,卡托普利组和光气与卡托普利联合组于染毒后立即腹腔注射5 mg/kg卡托普利。给药后观察24 h内大鼠存活情况。24 h后使用全身体积描记系统检测大鼠肺功能。然后处死大鼠,取肺组织,计算肺系数,采用HE染色评估肺组织病理损伤;BCA法检测肺泡灌洗液(BALF)中总蛋白浓度;ELISA法检测血清、BALF和肺匀浆中炎症因子IL-1β和TNF-α含量;用试剂盒检测超氧化物歧化酶(SOD)活性、谷胱甘肽过氧化物酶(GPx)活性和丙二醛(MDA)含量;免疫组织化学法和ELISA法检测肺组织血管紧张素转换酶(ACE)和血管紧张素Ⅱ(AngⅡ)的水平;TUNEL染色法观察肺组织中细胞凋亡情况;Western blot法检测肺组织凋亡相关蛋白Bcl-2的表达。结果: 与对照组相比,光气染毒组大鼠24 h存活率为80%,肺组织有出血点,HE染色呈现典型ALI病理改变;BALF、肺匀浆及血清中IL-1β和TNF-α水平均升高(P<0.01);SOD和GPx活性降低(P<0.05或P<0.01),MDA含量、ACE和Ang Ⅱ水平显著增加(P<0.01);凋亡细胞密度显著增加且Bcl-2蛋白表达下降(均为P<0.01)。与光气染毒组相比,光气与卡托普利联合组大鼠生存率显著提高(P<0.05),且肺组织病理损伤减轻,肺功能明显恢复(P<0.01);肺系数、BALF蛋白浓度显著降低(P<0.01),抗氧化酶SOD活性升高(P<0.05);IL-1β、TNF-α含量、ACE活性和Ang Ⅱ含量均下降(P<0.05);凋亡细胞数量减少(P<0.05),Bcl-2蛋白表达明显上升(P<0.01)。结论: 卡托普利能够显著改善光气诱导的急性肺损伤,其机制涉及肺泡屏障修复、抗氧化防御增强及炎症抑制。本研究为光气中毒的临床治疗提供了实验依据。

关键词: 卡托普利, 光气, 急性肺损伤, 炎症, 氧化应激

Abstract: OBJECTIVE: To establish a phosgene-induced acute lung injury(ALI) model in SD rats and to investigate mechanisms for improvement effect of captopril on ALI rats. METHODS: Forty male SD rats were randomly divided into control,phosgene poisoning(Phos),Captopril(CAP) and combined groups with phosgene and captopril(Phos+CAP), with ten rats in each group. Rats dynamically inhaled 41 mg/m3 phosgene for 30 minutes in Phos and Phos+CAP groups and received intraperitoneal injection with 5 mg/kg Captopril immediately after phosgene poisoning in CAP and Phos+CAP groups. Survival rates of the rats were determined within 24 hours after administration. Lung function of the rats was measured using a whole-body plethysmography(WBP)system after 24 hours. Rat lung tissues were collected to measure the lung coefficient. HE staining of lung tissues was performed to assess pathological damage. Total protein concentration was determined in bronchoalveolar lavage fluid(BALF) by BCA method. Inflammatory factors including IL-1β and TNF-α were detected by ELISA in serum, BALF and lung homogenate. Activities of superoxide dismutase(SOD) and glutathione peroxidase(GPx),content of malondialdehyde(MDA) were measured by kits. Levels of Angiotensin-converting enzyme(ACE)and angiotensin Ⅱ(Ang Ⅱ) were determined by immunohistochemistry and ELISA. Apoptosis in lung tissues was observed by TUNEL staining. Expression of Bcl-2 in lung tissue was detected by Western blotting. RESULTS: Compared with the control group, the 24 h survival rate of rats in the phosgene exposure group was 80%.Pulmonary hemorrhage spots were observed,and HE staining showed typical pathological changes of acute lung injury. Levels of IL-1β and TNF-α in bronchoalveolar lavage fluid,lung homogenate,and serum were elevated(P<0.01). Activities of SOD and GPx were decreased(P<0.05),while MDA content as well as ACE and Ang Ⅱ levels were significantly increased(P<0.01). Apoptotic cell density was markedly increased(P < 0.01) along with reduced expression of Bcl-2 protein(P<0.01). Compared with Phos group,levels of IL-1β and TNF-α and the activity of angiotensin-converting enzyme(ACE) and content of angiotensin Ⅱ(Ang Ⅱ) were significantly decreased in the Phos+CAP group(P<0.05). The number of apoptotic cells decreased(P<0.05),and Bcl-2 protein expression declined(P<0.01). CONCLUSION: Captopril significantly alleviated acute lung injury which was induced by phosgene. Alleviation mechanisms may be related to alveolar barrier repair, enhanced antioxidant defense and inflammation suppression. This study provides experimental evidence for a clinical approach of phosgene poisoning.

Key words: captopril, phosgene, acute lung injury, inflammation, oxidative stress

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