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目的 通过腹腔注射内毒素(LPS)建立小鼠急性肺损伤(ALI)模型,观察利拉鲁肽对ALI小鼠的保护作用.方法 36只SPF级Balb/c小鼠,雌雄各半,随机分为6组:急性肺损伤组(LPS组)、正常对照组(C组)、利拉鲁肽低浓度组(L组)、中浓度组(M组)、高浓度组(H组)、地塞米松阳性对照组(D组).LPS组及各药物处理组分别以LPS 15 mg/kg腹腔注射建立小鼠ALI模型,正常对照组注射磷酸盐缓冲液(PBS).注射LPS后,L、M、H组分别腹腔注射利拉鲁肽10、100、800μg/kg,D组腹腔注射地塞米松5 mg/kg,LPS组腹腔注射等量的PBS溶液.然后观察各组小鼠的一般情况;12 h后取肺组织,HE染色观察肺组织病理变化,并进行病理评分;测定肺组织湿/干重比值(W/D);瑞-吉氏染色法计数支气管肺泡灌洗液(BALF)细胞沉渣中中性粒细胞数(PMNs).结果 L,M,H组各组小鼠生理功能较LPS组有所改善,但组间比较差异无统计学意义(P>0.05),与D组比较差异无统计学意义(P>0.05);L,M,H组各组肺组织结构排列相对整齐,W/D值及PMNs 3组间比较差异无统计学意义(P>0.05),与D组比较差异无统计学意义(P>0.05),但均较LPS组低,差异有统计学意义(P0.05). Lung tissue structures of group L,M,H and D were arranged relatively in order,but there were no significant differences among them(P>0.05);the damage in these groups was less serious than that in group LPS(P0.05). Conclusion Liraglutide has a protective effect on acute lung injury induced by lipopolysaccharide in mice by improving physical function,reducing lung tissue damage and pulmonary edema,and decreasing lung neutrophil accumulation. The drug has no concentration dependence.