饱和氢气生理盐水对油酸致急性肺损伤大鼠肺的保护作用

摘要

Objective To study the effects of hydrogen - rich saline on the prevention of lung injury induced by oleic acid in rats. Methods Sprague - Dawley rats ( n = 30,250 ～ 300 g) were divided randomly into three experiment groups: sham operated group , oleic acid plus saline treatment (5mL/kg, ip ) , and oleic acid plus hydrogen - rich saline treatment ( 5 mL/kg, ip ) groups.Myeloperoxidase ( MPO) , malonyldialdehyde ( MDA) , TNF - α, IL - 1β and NF - κB p65 were examined and the changes of lung tissues were observed. Results Hydrogen - rich saline treatment decreased the neutrophil infiltration, the lipid membrane peroxidation, NF - κB p65 activation and the pro - inflammatory cytokine interleukin IL - 1β and TNF - α in the lung tissues compared with those in saline treated rats. Conclusion Hydrogen - rich saline attenuates lung injury induced by oleic acid.%目的 探讨饱和氢气生理盐水是否对油酸所致大鼠急性肺损伤具有保护作用.方法 将健康成年SD大鼠30只,随机分为对照组、油酸+生理盐水组和油酸+饱和氢气生理盐水组,每组10只.对照组(假手术组):予股动脉置管留取血气标本,待血流动力学稳定后经尾静脉注入生理盐水0.1 mL/kg;油酸+生理盐水组:注入高纯度油酸0.1 mL/kg,余同对照组;油酸+饱和氢气生理盐水组:注入高纯度油酸5 min后给予腹腔注射饱和氢气生理盐水5 mL/kg,余同油酸+生理盐水组;同时予前两组腹腔注射等量生理盐水,3 h后再次留取动脉血标本并处死大鼠.检测血气分析,肺组织髓过氧化物酶(MPO)活性、丙二醛(MDA)及肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)和NF-κB p65水平;观察肺组织病理变化.结果 与注射油酸前比较,生理盐水治疗组和饱和氢气生理盐水治疗组在注射油酸3 h后PaO2显著降低(P<0.05),且显著低于对照组(P<0.05).此外,饱和氢气生理盐水治疗组PaO2显著高于生理盐水治疗组(P<0.05).与对照组比较,生理盐水治疗组和饱和生理氢气盐水治疗组肺组织MPO活性及MDA水平显著增加(P<0.01,P<0.05),且饱和氢气生理盐水治疗组显著低于生理盐水治疗组(P<0.05).生理盐水治疗组和饱和氢气生理盐水治疗组肺组织TNF-α、IL-1β和NF-κB p65水平显著高于对照组(P<0.05),且饱和氢气生理盐水治疗组显著低于生理盐水治疗组(P<0.05).结论 饱和氢气生理盐水能够降低大鼠油酸肺损伤模型中肺的损伤程度,其机制可能与氢分子在体内的选择性抗氧化作用有关.