荔枝核提取物体外抗病毒活性及其机制研究

目的:研究荔枝核提取物(LSE)的体外抗病毒活性,并初步研究其抗病毒的作用机制.方法:采用细胞病变效应(CPE)减少法和MTY法检测LSE对柯萨奇B3病毒(Cox B3)、呼吸道合胞病毒(RSV)以及单纯疱疹病毒1型和2型(HSV-1和HSV-2)的体外抗病毒活性,并通过观察直接杀病毒作用、对宿主细胞的保护作用、抑制病毒吸附作用以及在病毒感染后不同时间加入实验,对LSE抑制HSV-1的作用机制进行探讨.结果:LSE有一定的细胞毒性,它不能抑制Cox B3在宿主细胞内的增殖,但对RSV、HSV-1和HSV-2表现出明显的浓度依赖性抗病毒活性,其IC<,50>值分别为32.3,27.9和20.4μg/mL.该提取物预培养Vero细胞后不能保护细胞免受HSV-1感染,但它对HSV-1有直接的灭活作用.LSE可影响HSV-1对Vero细胞的吸附,当浓度为31.3μg/mL时对病毒吸附的抑制率为51%.ISE对HSV-1在细胞内的增殖表现出很强的抑制活性.结论:LSE具有较强的体外抗RSV和HSV活性,它对HSV的抑制作用可能通过多种方式和途径实现.

Antiviral effect in vitro of extract from seed of Litchi chinensis Sonn and preliminary study on its antiviral mode

Aim:To study the antiviral effect of extract from seed of Litchi chinensis Sonn(LSE) in vitro,and to detect its antiviral mode.Methods:Both the cytopathic effect(CPE) reduction assay and MTT assay were used to detect the antiviral activity of LSE on Coxsackie virus B3(Cox B3),respiratory syncytial virus(RSV) long strain and herpes simplex virus type 1 and type 2(HSV-1 and HSV-2) standard strain.The mode of LSE anti-HSV effect was studied by direct virucidal assay,pre-treatment assay,inhibition of viral atta...