Abstract
Duck hepatitis A virus type 1 (DHAV-1) is a serious infectious virus of ducklings. Recent study showed baicalin (BA) and baicalin phospholipid complex (BAPC) possessed anti-DHAV-1 effect. However, the antiviral mechanism is not clear. Therefore, the aim of the present work is to study influences and mechanisms of BA and BAPC on DHAV-1. The effects of BA and BAPC on DHAV-1 replication were analyzed by CCK-8 and RT-qPCR methods. And the results showed BA inhibited the replication of DHAV-1, and BAPC was more effective. Then, the influences of BA and BAPC on DHAV-1 protein translation and RNA synthesis were detected by western blot and RT-qPCR. Both BA and BAPC inhibited the protein translation, and BAPC did better. Furthermore, BAPC also inhibited the RNA synthesis. Afterwards, DHAV-1 IRES activity, DHAV-1 3D protein stability, and cellular Hsp70 expression were studied to in-depth understand the inhibition effects of BA and BAPC on DHAV-1 replication. The results indicated BA and BAPC dropped the protein translation via suppressing DHAV-1 IRES activity. Additionally, BAPC dropped the RNA synthesis via reducing the 3D protein stability and inhibiting cellular Hsp70 expression.
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