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肝素对高浓度氧肺损伤新生鼠的保护作用

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摘要 目的探讨肝素对高浓度氧肺损伤新生大鼠的保护作用。方法将新生大鼠随机分为高氧组(给予浓度>95%氧气)、肝素干预组(给予浓度>95%氧气+肝素)、肝素组、正常空气组(给予浓度为21%氧气),72h后处死大鼠,每组随机取5只测定肺组织湿重/干重比值,另取5只观察肺组织病理学变化,取6只检测支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)中丙二醛(malondiadehyde,MDA)、肿瘤坏死因子-α(TNF-α)、白介素-8(IL-8)含量和总抗氧化能力(total anti-oxygen capability,TAOC)。结果新生鼠暴露于高氧72h可引起肺组织水肿,红细胞及蛋白渗出,肺泡间隔增宽,炎性细胞浸润,肺组织结构紊乱,肺大泡数量增多,Ⅱ型肺泡上皮细胞脱落等;高氧组BALF中MDA、TNF-α和IL-8含量均显著高于正常空气组(均P<0.01),TAOC显著降低(P<0.01)。肝素干预组肺损伤较轻,BALF中MDA、TNF-α和IL-8含量均低于高氧组(均P<0.01),TAOC高于高氧组(P<0.01);肝素组与正常空气组BALF中MDA、TNF-α、IL-8、TAOC均差异无显著性(均P>0.05)。结论新生鼠暴露于高浓度氧可引起急性肺损伤,肝素能减轻肺组织氧化应激反应和炎症反应,对高氧肺损伤新生鼠具有保护作用。
出处 《医药导报》 CAS 2008年第5期535-537,共3页 Herald of Medicine
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