富氢生理盐水对大鼠重度颅脑损伤后氧化应激保护作用的研究

摘要

目的：探讨富氢生理盐水对大鼠重度颅脑损伤（STBI）引起的氧化应激的保护作用。方法将60只健康的雄性Wistar大鼠，随机分为假手术组、STBI＋生理盐水（NS）组和STBI＋富氢生理盐水（HS）组。通过皮质直接打击方法建立大鼠STBI模型。模型建立后5 min内分别给予STBI＋NS组和STBI＋ HS组大鼠腹腔注射生理盐水和富氢生理盐水进行治疗。分别于手术前，手术后12、24、48 h检测3组动物血浆中丙二醛（MDA）水平、超氧化物歧化酶（SOD）及谷胱甘肽过氧化物酶（GSH-PX）的活性并进行比较分析。结果 STBI＋NS组动物血浆MDA水平在术后24 h和48 h明显升高（P＜0．05），富氢生理盐水治疗可以显著降低颅脑损伤后MDA的水平（P＜0．05）。STBI手术组动物血中的SOD及GSH-PX的活性在颅脑损伤后12 h有所升高，但在颅脑损伤24 h和48 h后显著降低（P＜0．05）。富氢生理盐水治疗可以显著增加颅脑损伤后SOD及GSH-PX的活性（P＜0．05）。结论富氢生理盐水治疗在某种程度上可通过降低体内氧化应激水平而对大鼠STBI具有保护作用。富氢生理盐水治疗可能是治疗颅脑损伤的更有效治疗策略。%Objective To investigate the protective effect of hydrogen-rich saline on systemic oxidative stress in rats with severe traumatic brain injury(STBI) .Methods Male Wistar rats(n=60) were divided into three groups randomly :sham group ,STBI+normal saline group ,STBI+ hydrogen-rich saline group .STBI model was induced by controlled cortical impact injury .Hydrogen-rich saline were intraperitoneally administered at 5 min after STBI operation .Plasma malondialdehyde (MDA ) ,Superoxide Dis-mutase(SOD) activity and glutathione peroxidase(GSH-PX) activity were measured before TBI operation ,12 ,24 h and 48 h after TBI operation .Results The level of MDA in STBI group plasma was significantly elevated from 24 h to 48 h after STBI operation (P< 0 .05) .Hydrogen-rich saline treatment significantly attenuated the increase of MDA level in STBI operation animals (P<0 .05) .The activities of SOD and GSH-PX were slightly elevated at 6 h after TBI operation ,but decreased significantly from 24 h to 48 h after STBI operation(P<0 .05) .Hydrogen-rich saline treatment significantly increased the activities of SOD and GSH-PX after STBI operation(P<0 .05) .Conclusion Hydrogen-rich saline could exert a protective effect against STBI via reducing oxidative stress .Molecular hydrogen might be a more effective therapeutic strategy for TBI patients .