苏黄止咳胶囊对咳嗽变异性哮喘豚鼠模型疗效的实验研究

【目的】观察苏黄止咳胶囊对咳嗽变异性哮喘(cough variant asthma,CVA)豚鼠模型的疗效,探讨苏黄止咳胶囊的作用机制。【方法】将50只豚鼠随机分成正常对照组、模型对照组、醋酸泼尼松组及苏黄止咳胶囊高、低剂量组,复制CVA豚鼠模型,检测各组豚鼠咳嗽反应、肺组织病理学、支气管肺泡灌洗液(BALF)中嗜酸粒细胞百分率及血清中白细胞介素-4(IL-4)、干扰素-γ(IFN-γ)、肿瘤坏死因子-α(TNF-α)、Ig E的水平变化。【结果】与正常对照组比较,模型对照组豚鼠咳嗽次数显著增多(P0.05);与模型对照组比较,苏黄高剂量组咳嗽次数显著减少(P0.05)。与正常对照组比较,模型对照组BALF中嗜酸性粒细胞百分率显著上升(P0.05);3个治疗组嗜酸性粒细胞百分率均较模型组显著降低(P0.05)。治疗组肺组织病理改变较模型对照组减轻。与正常对照组比较,模型对照组血清中IL-4、TNF-α、Ig E水平显著升高(P0.05);与模型对照组比较,醋酸泼尼松组血清中IL-4、TNF-α水平显著下降,苏黄高剂量组血清中TNF-α、Ig E水平显著下降(P0.05)。【结论】苏黄止咳胶囊可能通过降低血清中TNF-α和Ig E的水平,改善CVA豚鼠的咳嗽症状、气道炎症及肺组织病理变化,从而达到治疗CVA的目的。

Experimental Study of Therapeutic Effect of Suhuang Zhike Capsules for Guinea Pig Model with Cough Variant Asthma

Objective To observe the effects of Suhuang Zhike capsules(SZC) on the guinea pig model of cough variant asthma(CVA), and to explore its therapeutic mechanism. Methods Fifty guinea pigs were randomly divided into normal control group, model group, prednisone acetate tablets group, and high-and low-dose SZC groups. With reference to the related literatures, we set up the guinea pig model of CVA. The observation indexes included cough frequency, lung histopathology, the percentage of eosinophils in bronchoalveolar lavage fluid (BALF), and the serum levels of interleukin 4(IL-4), interferon gamma(IFN-γ), tumor necrosis factor alpha (TNF-α), and immunoglobumin E(IgE). Results Compared with the normal control group, the cough frequency of the model group was significantly increased(P<0.05); compared with the model group, the cough frequency of high-dose SZC group was reduced obviously(P < 0.05). Compared with the normal control group , the percentage of eosinophils in BALF of the model group was significantly increased(P < 0.05); the percentage of eosinophils of the three medication groups was lower than that of the model group (P<0.05). The pathological changes of lung tissue in the medication groups were relieved compared to the model group. Compared with the normal control group, the serum IL-4, TN F-α and IgE levels of the model group were increased significantly (P < 0 . 05); compared with the model group , the serum IL-4 and TN F-α levels of prednisone acetate tablets group were significantly decreased, and the serum TNF-α and IgE levels of high-dose SZC group were decreased significantly (P < 0.05). Conclusion SZC could reduce the serum, TNF-α and IgE levels , and relieve the cough symptom, airway inflammation and the lung tissue pathology in CVA guinea pig, so as to achieve the therapeutic effect on CVA.