张正玲+张翊玲+唐立俊+钱正敏
摘要:目的 探讨卡介苗多糖核酸(BCG-PSN)是否对被动吸烟小鼠的慢性气道炎症有保护作用。方法 将45只雌性C57BL/6小鼠随机分为三组:健康对照组、未治疗对照组、卡介苗多糖核酸治疗组。健康对照组不用任何处理,其余两组每天进行被动吸烟1次,连续30 d。治疗组:卡介苗多糖核酸0.2 ml,隔1 d肌注1次,连续30 d。实验结束24 h内将小鼠处死并收集标本。结果 与未治疗组比较,卡介苗多糖核酸治疗组小鼠肺组织、血清及肺泡灌洗液中诱生型一氧化氮合酶(iNOS)与一氧化氮(NO)显著降低(P<0.05)。结论 卡介苗多糖核酸对被动吸烟小鼠的慢性炎症具有一定的保护作用。
关键词:卡介苗多糖核酸;小鼠;被动吸烟;一氧化氮;一氧化氮合酶
中图分类号:R563.9 文献标识码:A 文章编号:1006-1959(2017)14-0047-03
Effects of BCG Polysaccharide Nucleic Acid on Lung Tissue,Bronchoalveolar Lavage Fluid,Serum NO and iNOS in Passive Smoking Mice
ZHANG Zheng-ling1,ZHANG Yi-ling2,TANG Li-jun1,QIAN Zheng-min1
(1.College of Life Science,Zunyi Normal University,Zunyi 563002,Guizhou,China;
2.Department of Respiratory Medicine,Guizhou Provincial People's Hospital,Guiyang 550002,Guizhou,China)
Abstract:Objective To investigate whether(BCG-PSN) has a protective effect on chronic airway inflammation in passive smoking mice.Methods 45 female C57BL/6 mice were randomly divided into three groups:healthy control group,untreated control group and BCG polysaccharide nucleic acid treatment group.Health control group without any treatment,the remaining two groups were passive smoking once a day for 30 d.Treatment group:BCG polysaccharide nucleic acid 0.2 ml,every 1 d intramuscular injection 1,for 30 d.Mice were sacrificed and samples were collected 24 h after the end of the experiment.Results Compared with the untreated group,the inducible nitric oxide synthase(iNOS)and nitric oxide(NO)were significantly decreased in lung tissue,serum and alveolar lavage fluid of BCG vaccine group(P<0.05).Conclusion BCG polysaccharide nucleic acid has a protective effect on chronic inflammation in passive smoking mice.
Key words:BCG polysaccharide nucleic acid;Mice;Passive smoking;Nitric oxide;Nitric oxide synthase
一氧化氮(NO)在生理和病理過程中扮演不同的角色,正常水平的NO对降压、扩张血管、抗炎及抗凝等方面发挥重要的作用。然而,高水平的NO对机体会产生损害作用。诱生型一氧化氮合酶(iNOS)的激活与炎症介质、细胞因子、感染、休克、缺血、缺氧等刺激因素等密切相关。iNOS过度激活、引起大量的NO产生是机体损害的重要因素之一[1-3]。众所周知,吸烟危害健康,烟雾中的尼古丁及焦油、烟碱和一氧化碳等有害物质是慢性呼吸道疾病重要的致病因素或危险因素,研究表明作为有害物质的烟雾颗粒可间接或直接通过激活iNOS mRNA表达从而产生大量的NO损伤肺组织[4-6]。卡介苗多糖核酸(BCG-PSN)作为免疫调节剂广泛应用于临床,BCG-PSN是采用卡介苗经热酚法提取的多糖核酸类物质,具有活化巨噬细胞,增强T细胞、B细胞……