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α-硫辛酸对脓毒症急性肺损伤大鼠的保护作用

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摘要 目的探讨α-硫辛酸(α-lipoic acid,ALA)对脓毒症急性肺损伤大鼠的保护作用。方法 SD大鼠根据不同实验目的随机分为对照组;模型组和ALA干预组。其中模型组采用盲肠结扎穿刺致脓毒症急性肺损伤大鼠模型。ALA干预组在模型组基础上分别给予浓度为10 mg/kg、30 mg/kg和200 mg/kg ALA腹腔注射。术后72h后获取血液及肺组织标本。检测动脉血气指标、肺湿干重比、支气管肺泡灌洗液中TNF-α,IL-1β和IL-6水平,以及肺组织中丙二醛(MDA)水平及髓过氧化物酶(MPO)活性。结果与正常对照组相比,模型组PaO2/FiO2含量显著降低,差异有统计学意义(P<0.01)。不同浓度ALA干预后,PaO2/FiO2进一步增高。模型组肺湿干重比降低,100 mg/kg ALA处理后,肺湿干重明显低于30 mg/kg和50 mg/kg组;模型组MDA和MOP含量显著高于正常对照组,ALA干预后,肺组织中MDA和MPO水平随着ALA浓度的增高而降低;此外,模型组大鼠BALF中TNF-α、IL-1β和IL-6含量明显增高。ALA能进一步降低TNF-α、IL-1β和IL-6含量。结论 ALA可减轻脓毒症急性肺损伤大鼠肺部气体交换功能,抑制炎症反应,从而发挥对脓毒症急性肺损伤大鼠的保护作用。
出处 《中外医疗》 2013年第25期68-70,共3页 China & Foreign Medical Treatment
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