支气管哮喘小鼠模型肺组织和肺泡灌洗液高迁移率族蛋白B1的表达及地塞米松的干预作用

目的 探讨支气管哮喘小鼠模型肺组织和肺泡灌洗液的高迁移率族蛋白B1(HMGB1)的表达变化及地塞米松的干预作用.方法 18只雌性Balb/C小鼠,随机分成3组,分别为磷酸盐缓冲液(PBS)对照组,鸡卵白蛋白(OVA)组,OVA/地塞米松治疗组;制作支气管哮喘模型;全身体积描记法检测小鼠气道反应性,支气管肺泡灌洗液(BALD作细胞分类计数,酶联免疫吸附试验(EUSA)测定BALF上清中HMGB1含量,左肺行苏木精-伊红(HE)染色,蛋白免疫印迹方法检测右肺组织HMGB1表达.结果 1、成功制作支气管哮喘模型.2、BALF中HMGB1含量变化:OVA组肺泡灌洗液中HMGB1含量(6.31±4.05ng/ml)显著高于对照组(2.59±0.73ng/ml)(P=0.017);与OVA组比较,OVA/地塞米松组(3.39±0.50ng/ml)小鼠支气管肺泡灌洗液HMGB1含量无显著降低(P=0.052).3、肺组织HMGB1的表达情况:OVA组小鼠肺组织HMGB1相对表达量(HMGB1/TUBULIN)(2.08±0.87)显著高于对照组(0.93±0.18)(P<0.05);与OVA组比较,OVA/地塞米松组小鼠肺脏HMGB1表达量(1.15±0.48)无显著减低(P=0.133).结论 HMGB1在支气管哮喘小鼠的肺组织和支气管肺泡灌洗液中表达明显增加,但地塞米松无明显拮抗效果.提示HMGB1可能是哮喘防治的新靶点.

Expression of high mobility group box-1 in the lung tissue and BALF of asthmatic mice and the influence of dexamethasone

Objective To investigate the expression of high mobility group box-1(HMGB1) in the lung tissue and bronchoalveolar lavage fluid(BALF) of asthmatic mouse models and the influence of dexamethasone(DM).Methods Eighteen female Balb/C mice were randomly divided PBS control group,OVA group and OVA/DM group,and asthmatic mouse models were established in the lattertwo groups.The airway responsiveness of the mice was assessed by whole-body plethysmography,and the cells in the BALF were counted and classified,with th...