The in vivo antiviral activity of EPN and SEPN was probably realized via the enhancement of lymphocyte proliferation and killing activity of NK cells.

• 新月菱形藻胞外多糖及其硫酸酯可能通过促进淋巴细胞增值,增强NK细胞的杀伤活力实现对FM1病毒的抑制作用。