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A Recombinant Turkey Herpesvirus Expressing the F Protein of Newcastle Disease Virus Genotype XII Generated by NHEJ-CRISPR/Cas9 and Cre-LoxP Systems Confers Protection against Genotype XII Challenge in Chickens

Viruses. 2022-04; 
Katherine Calderón, Aldo Rojas-Neyra, Brigith Carbajal-Lévano, Luis Luján-Valenzuela, Julio Ticona, Gisela Isasi-Rivas, Angela Montalvan, Manuel Criollo-Orozco, Edison Huaccachi-Gonzáles, Luis Tataje-Lavanda, Karla Lucia F Alvarez, Manolo Fernández-Sánchez, Manolo Fernández-Díaz, Na Tang, Yongxiu Yao, Venugopal Nair
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摘要

In this study, we developed a new recombinant virus rHVT-F using a Turkey herpesvirus (HVT) vector, expressing the fusion (F) protein of the genotype XII Newcastle disease virus (NDV) circulating in Peru. We evaluated the viral shedding and efficacy against the NDV genotype XII challenge in specific pathogen-free (SPF) chickens. The F protein expression cassette was inserted in the unique long (UL) UL45-UL46 intergenic locus of the HVT genome by utilizing a clustered regularly interspaced short palindromic repeat (CRISPR)/Cas9 gene-editing technology via a non-homologous end joining (NHEJ) repair pathway. The rHVT-F virus, which expressed the F protein stably in vitro and in vivo, showed similar growth kinetics... More

关键词

CRISPR/Cas9, NHEJ, Newcastle disease virus, Turkey herpesvirus, challenge protection, fusion gene, genotype XII, shed challenge virus
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