银花平感颗粒体内抗甲型H1N1流感病毒作用

为探讨银花平感颗粒(YHPG)体内抗甲型流感病毒A/PR/8/34(H1N1)作用及其对流感病毒感染小鼠免疫功能的影响,采用滴鼻感染ICR小鼠建立流感病毒肺炎模型,感染后第3天和第7天测定各组动物肺指数并观察肺组织病理变化;采用实时荧光定量RT-PCR和流式细胞技术,观察各组肺组织病毒载量以及外周血T细胞亚群(CD4⁺,CD8⁺,CD4⁺/CD8⁺)的变化。结果表明,YHPG(15,30 g·kg^-1)剂量组在感染后第3天和第7天均能显著降低流感病毒感染小鼠肺指数和肺组织病毒载量,减轻肺组织病理变化,同时还可显著提高外周血CD4⁺ T细胞水平和CD4⁺/CD8⁺比值,降低CD8⁺ T细胞水平。说明YHPG可抑制流感病毒复制、减轻流感病毒感染小鼠肺部损伤以及调节流感病毒小鼠免疫功能下降,对甲型H1N1流感病毒感染小鼠有一定的治疗作用。

Effect of Yinghua Pinggan granule against influenza A/H1N1 virus in vivo

To study the effect of Yinghua Pinggan granule (YHPG) against influenza A/H1N1 virus in vivo and on the immunologic function of infected mice. The intranasal influenza virus infection was adopted in ICR mouse to establish the influenza virus pneumonia model. At the 3rd and 7th day after the infection, the lung index and pathologic changes in lung tissues of mice were detected. Real-time PCR and flow cytometry were employed to observe the virus load in lung tissues and the levels of CD4⁺, CD8⁺, and CD4⁺/CD8⁺ in peripheral blood. The result showed that at the 3rd and 7th day after the infection, YHPG (15, 30 g·kg^-1) can significant decrease in the lung index and virus load in lung tissues of mice infected with influenza virus, alleviate the pathologic changes in lung tissues, significantly increase the levels of CD4⁺ and CD4⁺/CD8⁺ ratio and reduce the levels of CD8⁺ in whole blood. This indicated that YHPG can inhibit the influenza virus replication, alleviate pulmonary damage and adjust the weak immunologic function of infected mice, with a certain therapeutic effect on mice infected by H1N1 virus in vivo.