金翘片体内抗流感病毒作用研究

Anti-influenza Virus Activity of Jin Qiao Tablets in Vivo

【目的】探讨金翘片的体内抗流感病毒作用。【方法】以15 LD50流感病毒滴鼻感染小鼠造成肺炎模型,经预防或治疗给药5 d后,取小鼠肺组织,称重,采用实时荧光定量PCR反应检测肺组织中的病毒载量,采用双抗体夹心酶联免疫吸附分析(ELISA)法检测肺组织和血清中的γ-干扰素(γ-IFN)水平,观察金翘片对小鼠肺指数、病毒载量和γ-IFN的影响;以3LD50流感病毒滴鼻感染小鼠造成肺炎模型,经预防或治疗给药7 d后,观察动物发病情况和死亡数,共14 d,评价金翘片对小鼠死亡保护和生命延长的作用。【结果】金翘片能明显抑制小鼠肺指数升高,提高死亡保护率和生命延长率,降低肺组织的病毒载量,提高γ-IFN水平(P<0.05或P<0.01);金翘片抗流感病毒作用明显优于银翘解毒片和连花清瘟胶囊,相当于达菲;金翘片预防作用优于治疗作用,但无明显差异。【结论】金翘片具有明显的抗甲型H1N1流感病毒作用。

Objective To study the antiviral effect of Jin Qiao Tablets on influenza A H1 N1 virus in vivo.Methods The mouse pneumonia model was established by nasal inhalation of 15 LD50 of influenza virus. After prophylactic or therapeutic medication for 5 d,mouse lung tissue was taken out and weighed. Viral load in lung tissue was measured by polymerse chain reaction（PCR）,and the level of γ-interferon（γ-IFN）in rat serum and lung was detected by double antibody sandwich enzyme-linked immunosorbent assay（ELISA）for evaluating the effect of Jin Qiao Tablets on lung index, viral load and γ-IFN in rats. After prophylactic or therapeutic medication for 7 d,morbidity and mortality within 14 d of mice with pneumonia induced by nasal inhalation of 3LD50 were observed to evaluate the action of Jin Qiao Tablets for protecting against death and prolonging life span. Results Jin Qiao Tablets markedly decreased the increased lung index,promoted the death-protection rate and life-prolongation rate, decreased viral load, raised the level of γ-IFN in mice（P 0.05 or P 0.01）.Experimental results in vivo showed that Jin Qiao Tablets had better anti-influenza virus activity than Yinqiao Jiedu Tablets and Lianhua Qingwen Capsules, and the effect of Jin Qiao Tablets was equivalent to that of Tamiflu. The prophylactic effect of Jin Qiao Tablets was stronger than the therapeutic effect, but there was no significant difference between them. Conclusion Jin Qiao Tablets have obvious effect against influenza A H1 N1 virus in vivo.