腹腔注射氢气与富氢生理盐水对新生大鼠高氧肺损伤的作用研究

摘要

Objective To observe and comparatively analysize the effect of intraperitoneal injection of hydrogen and hydrogen-rich saline in neonatal rats with hyperoxia-induced lung injury.Methods Sprague-Dawley(SD) newborn rats were randomly divided into six groups(n=10).air group(A),air+ hydrogen-rich saline group(B),air+hydrogen group(C),hyperoxia group(D),hyperoxia+hydrogen-rich saline group (E) and hyperoxia+ hydrogen group(F).The group A,B and C were exposed to air and group D,E and F were exposed to 95 ％ oxygen.The group B and E were intraperitoneally injected with hydrogen-rich saline (10 mL/kg,twice daily),while the groups C and F with hydrogen (10 mL/kg,twice daily).The group A and D were injected with normal saline(10 mL/kg,twice daily).Lung tissue and serum samples were collected on 15 d of experiment.The pathological changes of lung tissue and radiate alveoli count (RAC) were observed by HE staining.The content of HYP in lung tissue was detected by the alkaline hydrolysis method,serum SOD and MDA levels were measured.The expression of α-SMA in lung tissue was detected by immunohistochemistry SP method.Results Compared with the A group,RAC and SOD activities in the D group were significantly decreased,while the HYP and MDA levels and α-SMA expression were significantly increased.Hydrogen intervention could significantly alleviate these changes caused by hyperoxia.while intraperitoneal injection of hydrogen got better effect than intraperitoneal injection of hydrogen-rich saline.Conclusion Hydrogen can extenuate the indexes of hyperoxia-induced lung oxidative damage,impairment development and fibrosis to a certain extent.Intraperitoneal injection of hydrogen has slightly better effect than hydrogen-rich saline.%目的 对比分析腹腔注射氢气(H2)和富氢生理盐水对高氧致新生大鼠肺损伤的作用.方法 将SD新生大鼠分为6组(每组10只),A组(空气组)、B组(空气十富氢生理盐水组)、C组(空气+ H2组)、D组(高氧组)、E组(高氧十富氢生理盐水组)、F组(高氧+ H2组).A、B、C组置于空气中,D、E、F组置于95％ O2中,B、E组每日腹腔注射富氢生理盐水2次(10 mL/kg),C、F组每日腹腔注射H2 2次(10mL/kg),A、D组每日腹腔注射普通生理盐水2次(10mL/kg).于实验第15天收集肺组织和血清标本,苏木精-伊红(HE)染色后光镜下观察肺组织病理改变和辐射状肺泡计数(RAC),碱水解法检测肺组织羟脯氨酸(HYP)、血清丙二醛(MDA)、超氧化物歧化酶(SOD)水平,免疫组织化学SP法检测肌成纤维细胞袁型标志α-平滑肌肌动蛋白(α-SMA)表达.结果 与A组相比,D组RAC、血清SOD活力明显降低,HYP、MDA水平及α-SMA表达均明显增加,H2干预可显著缓解高氧所致上述变化,腹腔注射H2较腹腔注射富氢生理盐水效果更佳.结论 H2可一定程度减轻高氧导致的肺氧化损伤、发育受阻及纤维化指标,腹腔注射H2较腹腔注射高氢生理盐水效果更佳.