二陈汤加味对慢性阻塞性肺病大鼠细支气管IL-19，IL-20R1，IL-20R2表达的影响

目的:观察二陈汤加味对慢性阻塞性肺病(COPD)大鼠细支气管中白细胞介素-19(IL-19),及其受体IL-20R_1,IL-20R_2表达的影响,探索二陈汤加味对COPD抗炎的机制。方法:用香烟烟雾联合脂多糖(LPS)制备COPD大鼠模型,将实验大鼠随机分为6组:正常组,模型组,二陈汤加味高、中、低剂量组,急支糖浆组。正常组与模型组灌生理盐水4 m L·d~(-1),二陈汤加味高、中、低剂量组(20,10,5 g·kg~(-1)·d~(-1)),急支糖浆组(12 g·kg~(-1)·d~(-1)),各组均连续灌胃14 d,2次/d。观察大鼠一般情况;评价大鼠肺功能;酶联免疫吸附测定(ELISA)检测大鼠血清中IL-10,IL-19和IL-20的含量;光镜观察大鼠细支气管组织病理变化;免疫组化检测大鼠细支气管组织中IL-20R_1和IL-20R_2的表达情况。结果:与正常组比较,模型组的最大呼吸流量(PEF),1 s用力呼吸容积(FEV_1),用力肺活量(FVC),FEV_1/FVC的值均显著降低(P0.05),血清中IL-19,IL-20的含量明显升高(P0.05),IL-10含量明显降低(P0.05),细支气管组织中IL-20R_1,IL-20R_2的表达明显升高(P0.05)。与模型组比较,急支糖浆组、二陈汤加味高、中、低剂量组的PEF,FEV_1,FVC,FEV_1/FVC均明显升高(P0.05);血清中IL-19,IL-20的含量明显降低(P0.05),IL-10含量明显升高(P0.05);细支气管组织中IL-20R_1,IL-20R_2的表达明显降低(P0.05)。结论:二陈汤加味可以改善COPD大鼠的肺功能,保护细支气管的组织结构,其机制可能与二陈汤加味抑制大鼠细支气管中IL-19,IL-20及其受体IL-20R_1,IL-20R_2的表达有关。

Effect of Modified Erchentang on Expression of IL-19,IL-20R1,IL-20R2 in Bronchioles of Rats with Chronic Obstructive Pulmonary Disease

Objective: To observe the effect of modified Erchentang on the expression of interleukin-19 (IL-19), interleukin-20 (IL-20)and their receptor IL-20R₁, IL-20R₂ in bronchioles of rats with chronic obstructive pulmonary disease (COPD), and to explore the molecular mechanism of modified Erchentang on anti-inflammatory of COPD. Method: The model of rat with COPD was established by cigarette smoke combined with lipopolysaccharide (LPS). The experimental rats were randomly divided into 6 groups:normal group, model group, modified Erchentang high, medium and low dose group, and Jizhitangjiang group. Normal group and model group fed with normal saline 4 mL · d^-1, modified Erchentang high, middle, low dosage group(20,10,5 g · kg^-1 · d^-1).The dosage of Jizhitangjiang group was 12 g · kg^-1 · d^-1, all groups were given intragastric administration for 14 days, twice a day. To observe the general situation of rats.To evaluate the pulmonary function of rats. To detect the contents of IL-10, IL-19 and IL-20 in serum by enzyme-linked immunosorbent assay (ELISA).To observe the pathological changes of bronchiole tissue by light microscopy.To detect the expression of IL-20R₁ and IL-20R₂ in bronchiole tissue by immunohistochemistry. Result: Compared with normal group, peak expiratory flow(PEF), forced expiratory volume in one second(FEV₁), forced vital capacity (FVC), and FEV₁/FVC in model group were significantly increased (P<0.05), the content of IL-19, IL-20 in serum significantly increased(P<0.05), the content of IL-10 in serum was significantly decreased (P<0.05), the expression of IL-20R₁ and in bronchioles tissue significantly increased (P<0.05). Compared with model group, the PEF, FEV₁, FVC, FEV₁/FVC of Jizhitangjiang group, modified Erchentang high, medium and low dosage group were significantly increased(P<0.05).The content of IL-19, IL-20 in serum significantly decreased(P<0.05), the content of IL-10 in serum was significantly increased (P<0.05), the expression of IL-20R₁ and IL-20R₂ in bronchioles tissue was significantly decreased (P<0.05). Conclusion: Modified Erchentang can improve the lung function and protect the tissue structure of bronchioles in COPD rats, which may be related to the inhibition of the expression of IL-19, IL-20 and their receptor IL-20R₁, IL-20R₂ in bronchioles of rats with modified Erchentang.