Objective To investigate the molecular mechanism of inhibitory effect of Danshen injection on allergic airway inflamma-tion of asthma. Methods 30 SD rats were random divided into control group, asthma group and Danshen injection group. Bronchoalveolar lavage fluid (BALF) was collected, and cytology study was conducted. The lung tissue was obtained and pathologic analysis was done through HE staining, lnterleukin-13 (IL-13) and Eotaxin in lung tissue were measured by RT - PCR and immunohistochemistry SP method. Results Compared with the asthma group, less infiltration of inflammatory cells in lung tissues was observed in the Danshen injection group. Total cell number, the percentage of lymphocytes, neutrophils and eosinophils (Eos) in BALF of Danshen injection group were lower than that of asthma group (P<0.05, P<0.01). The expression of IL-13 and eotaxin in lung tissue of asthma group was higher than that of control group and Danshen injection group (P<0.05). The expression of IL-13 was negatively correlated with eotaxin (r=0.90, P< 0.05). Conclusion Danshen injection could suppress airway inflammation of asthmatic rats, which probably be through decreasing the ex-pression of IL-13 and eotaxin in the lung tissue of asthmatic rats.%目的 探讨丹参注射液抑制哮喘气道变应性炎症的分子机制.方法 30只SD大鼠随机分成正常对照组,哮喘组,丹参组,每组10只.HE染色行肺组织病理学检查,计数支气管肺泡灌洗液(BALF)中细胞总数并分类,应用免疫组化SP法和逆转录聚合酶链反应(RT-PCR)测定肺组织中白细胞介素-13(IL-13)和嗜酸性粒细胞趋化因子(Eotaxin)表达.结果病理组织学显示:丹参组较哮喘组肺组织炎性细胞浸润明显减少.丹参组BALF细胞总数及淋巴细胞(Lym)、中性粒细胞(Neu)和嗜酸性粒细胞(Eos)百分率较哮喘组明显减少(P<0.05,P<0.01),与正常对照组比较差异无统计学意义(P>0.05).哮喘组肺组织IL-13和Eotaxin表达较正常对照组明显增加(P<0.05),丹参组IL-13和Eotaxin表达较哮喘组明显减少(P<0.05).IL-13和Eotaxin表达呈正相关(r=0.90,P<0.01).结论 丹参注射液可减轻哮喘大鼠气道炎症反应,其机制可能与降低哮喘大鼠肺内IL-13和Eotaxin表达有关.
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