【摘要】 目的探讨δ阿片受体激动剂DADLE(D-Ala2-D-Leu5-enkephali)对脓毒症大鼠肺功能保护作用及其机制。方法SD大鼠72只,分为假手术组(SO组)、脓毒症组(SEP组)和DADLE给药组(DADLE组),每组24只。采用改良盲肠结扎穿孔方法(CLP)建立大鼠脓毒症模型,SO组除不结扎、刺穿盲肠外,其余操作同SEP组,DADLE组模型建立后立即按5 ml/kg体重静脉注射浓度为0.5 mg/ml的DALDE。于手术后2、6、10 h开腹取血行动脉血气分析;测定肺组织湿/干重(W/D)比值;测定肺组织匀浆中髓过氧化物酶(MPO)、丙二醛(MDA)、三磷酸腺苷(ATP)含量;检测血浆中肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)含量;观察并比较各组肺组织病理改变。结果与SEP组相比,DA-DLE组PaCO2、PaO2均明显提高(P<0.05);W/D值明显降低(P<0.05);肺组织MPO、MDA含量明显降低(P<0.05),ATP含量明显升高(P<0.05);血浆TNF-α和IL-6含量明显降低(P<0.05);肺组织病理学改变明显减轻。结论δ阿片受体激动剂DADLE对脓毒症大鼠肺功能具有一定的保护作用。更多还原

【Abstract】 Objective To study the protective effects of DADLE on pulmonary function in rats with sepsis and the mechanism.Methods Seventy-two SD rats were randomly divided into sham operated group(SO),septic group(SEP),and DADLE-treated group(DADLE).Sepsis model was induced by cecal ligation and puncture(CLP).In SO group,the abdomen was opened without any other treatment.In DADLE-treated group,DADLE(0.5 mg/ml)was administerd at a dose of 5 ml/kg by intravenous injection after CLP.Rats were sacrificed at the 2nd,6th and 10th h after CLP.Arterial blood was collected for blood gas analysis.The wet-to-dry lung weight ratio was measured,and the levels of TNF-α and IL-6 in blood were detected.The levels of MPO,MDA and ATP in lung tissue were determined.The pathologic changes of the lungs were examined under a light microscope.Results As compared with SEP group,PaCO2,and PaO2 were significantly increased(P<0.05),while the wet-to-dry ratio and levels of serum TNF-α and IL-6 were significantly reduced(P<0.05),and levels of MPO and MDA were significantly reduced(P<0.05)and content of ATP in lung tissue was significantly increased(P<0.05)in DADLE group.More severe pathological changes were found in SEP group than in DADLE group.Conclusion DADLE has pulmonary protective effects in rats with sepsis.更多还原