Single Dose of Recombinant Baculovirus Vaccine Expressing Sigma B and Sigma C Genes Provides Good Protection Against Novel Duck Reovirus Challenge in Ducks

Overview

Journal Poult Sci

Publisher Elsevier

Specialty Veterinary Medicine

Date 2024 Dec 4

PMID 39631275

Authors

Yufei Wang

Siyi Xu

Xia Chen

Yunlong Dou

Xingzhu Yang

Zenglei Hu

Shuang Wu

Xiaoquan Wang

Jiao Hu

Xiufan Liu

Affiliations

Soon will be listed here.

Abstract

The novel duck reovirus (NDRV) disease causes high economic losses, resulting in substantial economic losses in waterfowl industry. However, currently, no commercial vaccines are available to alleviate NDRV infection throughout the world. Here, we developed two subunit vaccine candidates for NDRV based on the insect cell-baculovirus expression system (IC-BEVS). Two recombinant viruses, namely rBac-σB and rBac-σC, were successfully generated based on the consensus sequence of NDRV. Then, the σB and σC subunit vaccine candidates were prepared by directly inactivating the recombinant virus infected-Sf9 cell suspension. The double antibody-sandwich ELISA was used for quantitative of σB or σC protein in the inactivated crude antigen. Protective efficacy results revealed that, compared with the whole virus inactivated vaccine, a single dose of 160 ng σB or σC protein showed advantages in inducing serum antibodies, elevating weight, alleviating liver and spleen injury, restraining viral shedding and viral replication in ducklings. To be noted, the subunit σC or the combination of subunit σB and σC vaccine candidates had better protective efficacies, especially the combined σB and σC vaccine group. Therefore, our study provides useful information for developing effective vaccine against NDRV infection.

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