复方芩兰口服液对人冠状病毒肺炎疫毒袭肺证的治疗作用

研究省级新型冠状病毒肺炎中医药防治方案推荐用药复方芩兰口服液对BALB/c小鼠人冠状病毒肺炎疫毒袭肺证的治疗作用,并初步探讨其在新型冠状病毒肺炎临床治疗中的作用,为中医药临床提供实验室数据支持。该研究根据国家主管部门对新型冠状病毒肺炎中医病证的分类,确定在寒湿证小鼠模型基础上感染人冠状病毒229E(HCoV-229E),形成人冠状病毒肺炎疫毒袭肺证病证结合模型,该模型可模拟《新型冠状病毒肺炎诊疗方案(试行第六版)》中医治疗普通型病证。具体步骤如下:建立寒湿证小鼠模型,在此模型基础上感染HCoV-229E病毒,实验分为正常对照组,感染对照组,寒湿对照组,寒湿感染组(模型组),复方芩兰口服液高(22 mL·kg^-1·d^-1)、低(11 mL·kg^-1·d^-1)剂量组。感染当天给予复方芩兰口服液治疗,连续给药3 d。末次给药第2天解剖取肺组织,计算肺指数及抑制率;提取肺组织核酸,RT-PCR法检测病毒载量;分离血液白细胞,流式细胞术检测T和B淋巴细胞百分比;提取肺组织蛋白,ELISA法检测IL-6,IL-10,TNF-α及IFN-γ含量;分离血清,ELISA法检测胃泌素、胃动素含量;组织病理学检测肺组织病变。结果显示,复方芩兰口服液高、低剂量能显著降低人冠状病毒肺炎疫毒袭肺证小鼠的肺指数(P<0.01),抑制率分别为59.01%,47.72%;显著降低人冠状病毒肺炎疫毒袭肺证小鼠的肺组织病毒载量(P<0.01);显著升高人冠状病毒肺炎疫毒袭肺证小鼠外周血CD4^+ T淋巴细胞、CD8^+ T淋巴细胞及总B淋巴细胞百分比(P<0.01);显著降低人冠状病毒肺炎疫毒袭肺证小鼠的血清胃动素(MTL)含量(P<0.01);显著降低人冠状病毒肺炎疫毒袭肺证小鼠肺组织中IL-6,IL-10,TNF-α及IFN-γ含量(P<0.01);明显改善肺组织炎症。复方芩兰口服液对小鼠人冠状病毒肺炎疫毒袭肺证有较好的疗效,可能通过抑制肺组织病毒复制,改善胃肠道功能,增强机体免疫能力,降低肺细胞炎性因子表达发挥作用。

Therapeutic effect of Compound Qinlan Oral Liquid on treating combining disease with syndrome of human coronavirus pneumonia with pestilence attacking lung syndrome

The aim of this paper was to investigate the therapeutic effect of Compound Qinlan Oral Liquid recommended by Provincial Novel Coronary Virus Pneumonia Treatment Scheme on the treatment of BALB/c mice with combining disease with syndrome of human coronavirus pneumonia with pestilence attacking lung syndrome and to explore its clinical application in the treatment of novel coronavirus pneumonia, and to provide laboratory data support for clinical Chinese medicine. According to the classification of syndromes of novel coronavirus pneumonia by the national competent department of traditional Chinese medicine, this study determined that human coronavirus 229 E(HCoV-229 E)-infected mouse model of cold and dampness syndrome can be used to study human coronavirus pneumonia combined with pestilence attacking the lung syndrome model. This model is suitable for simulating traditional Chinese medicine treatment of common disease syndromes in Novel Coronavirus Pneumonia Diagnosis and Treatment program(trial implementation of the sixth edition). Specific steps are as follows. BALB/c mice of cold and dampness syndrome is infected with HCoV-229 E virus, and were divided into normal control group, infection control group, cold-dampness control group, cold-dampness infection group(the model group), and Compound Qilan Oral Liquid high dose group(22 mL·kg^-1·d^-1) and low dose group(11 mL·kg^-1·d^-1). On the day of infection, the Compound Qilan Oral Liquid was administered for three consecutive days. On the last dosing day, the lung tissue was dissected, and the lung index and inhibition rate were calculated. The nucleic acid of lung tissue was extracted and the HCoV-229 E virus load was detected by RT-PCR. Blood leukocytes were separated and the percentage of T and B lymphocytes was detected by flow cytometry. Lung tissue protein was extracted and the contents of IL-6, IL-10, TNF-α and IFN-γ were detected by ELISA. Serum was separated and the contents of gastrin(GAS) and motilin(MTL) were detected by ELISA. Histopathological analysis was performed with lung tissue. The high and low doses of Compound Qinlan Oral Liquid significantly reduced the lung index(P<0.01) of mice with combining disease with syndrome of human coronavirus pneumonia with pestilence attacking lung syndrome, and the inhibition rates were 59.01% and 47.72%, respectively. Compared with the model control group, the high and low doses of Compound Qinlan Oral Liquid significantly reduced lung tissue viral load(P<0.01), increased cross blood CD4^+ T lymphocytes, CD8^+ T lymphocytes and total B lymphocyte percentage(P<0.01), reduced serum motilin content(P<0.01), reduced IL-6, IL-10, TNF-α and IFN-γ levels in lungs(P<0.01) and reduced lung tissue inflammation. Compound Qinlan Oral Liquid has a better effect on the mouse model with combining disease with syndrome of human coronavirus pneumonia with pestilence attacking lung syndrome, which may attribute to its function of in virus replication inhibition, gastrointestinal function improvement, immunity enhancement, and inflammatory factor reduction.