临床常用中成药的体外抗流感病毒活性评价

本文旨在研究我国临床常用清热解毒中成药的体外抗病毒活性。通过应用已建立的流感病毒神经氨酸酶 (neuraminidase, NA) 抑制剂筛选模型, 评价了33种临床常用中成药的NA抑制活性, 应用已建立的流感病毒诱导的细胞病变效应模型, 对具有NA抑制作用的部分中成药进行了体外抗病毒活性评价。结果表明, 临床常用中成药液体制剂的NA抑制活性普遍较高, 包括双黄连口服液、清开灵口服液、清热解毒口服液和热毒宁注射液, 其中双黄连口服液在细胞水平对于病毒感染所致细胞病变效应 (CPE) 也具有较高抑制活性; 中成药固体制剂中, 双黄连注射粉针的NA抑制活性最高, 而复方鱼腥草片则显示较高的体外抗病毒活性。综合分析表明, 大多数中成药具有一定的NA抑制活性, 但只有部分药物具有明显的体外抗病毒活性, 其活性结果对于中成药的活性物质基础研究和临床用药将具有指导意义。

Evaluation of Chinese traditional patent medicines against influenza virus in vitro

To study in vitro anti-influenza viral activities of Chinese traditional patent medicines for influenza prevention and treatment, neuraminidase (NA) activity assay was used to examine NA inhibitory activity of 33 Chinese traditional patent medicines through fluorimetric assay, and influenza virus induced cytopathic effect (CPE) inhibition assay was used to verify their anti-influenza viral activities in vitro.  The assay results showed that most liquid preparations displayed relatively high NA inhibitory activities, such as Shuanghuanglian oral liquid, Qingkailing oral liquid, Qingre Jiedu oral liquid, and Reduning injection.  Among liquid preparations, Shuanghuanglian oral liquid not only displayed the highest NA inhibitory effect, but also exhibited obvious in vitro anti-viral activity in CPE experiment.  Among solid preparations, Shuanghuanglian powder for injection showed the highest activity on NA inhibition, and Fufang Yuxingcao tablet showed relatively strong anti-influenza viral activity in CPE cells.  From the results, it can be concluded that most Chinese traditional patent medicines  possessed NA inhibitory activity, but only a few of them displayed significant in vitro anti-influenza viral activities.  These results will provide important information for the isolation of active constituents, and for the clinical uses of Chinese traditional patent medicines for influenza treatment and prevention.