结缔组织生长因子在哮喘小鼠肺组织中的表达及阿奇霉素的干预作用

目的 探讨结缔组织生长因子(CTGF)在哮喘小鼠气道重构中的作用和阿奇霉素对气道重构的干预作用.方法 30只雄性BALB/c小鼠随机分为健康对照组(A组)、哮喘模型组(B组)、阿奇霉素治疗组(C组),每组各10只.以卵白蛋白(OVA)致敏并持续激发小鼠哮喘,天狼猩红染色法检测胶原分布及分类,酸水解法测定肺组织羟脯氨酸含量,SABC免疫组化法检测CTGF在肺组织的表达.结果 哮喘组小鼠气道壁胶原增生,气道上皮细胞CTGF表达阳性,CTGF表达与肺羟脯氨酸含量密切相关(r=0.65,P<0.01).阿奇霉素治疗组小鼠气道壁胶原轻度增生,CTGF表达弱阳性.结论 哮喘小鼠出现气道上皮下纤维化及气道重构的机制可能与CTGF表达上调有关.阿奇霉素能抑制(CTGF的表达,改善气道重构.

The expression of connective tissue growth factor in asthmatic mice and the effect of azithromycin

Objective To investigate the expression of connective tissue growth factor( CTGF) and the effects of azithromycin in airway remodeling in asthmatic mice.Methods BALB/c female mice were randomly divided into 3 groups;control group(A),asthma group(B) ,and azithromycin treated group(C),with 10 mice in each group.Mice were sensitized and challenged continually with ovalbumin( OVA).The distribution and types of collagens were detected by cirius red staining.Lung hydroxyproline content was determined by acid hydrolysis.CTCF expression in mice pulmonary tissues was detected by SABC immunohistochemistry.Results After continual challenging with OVA,collagen hyperplasia was found in the airway wall and CTCF positive expression in airway epithelium.CTCF expression was closely associated with lung hydroxyproline content(r = 0.65,P <0.01).Conclusion Asthma continually challenged with OVA could result sub-epithelial fibrosis and remodeling in airway,which could be associated with the upregulation of CTCF over-expression.Azithromycin inhibited airway remodeling in asthmatic mice,possibly by inhibiting the expression of CTGF.