[Antigenic and immunogenic activity of virus-like particles based on rabbit hemorrhagic disease virus (Caliciviridae: Lagovirus ) genotypes GI1 and GI2 recombinant major capsid proteins].

Autor:	Mukhin AN; Vetbiochem LLC., Alekseev KP; Vetbiochem LLC., Yuzhakov AG; Federal Scientific Center - All-Russian Research Institute of Experimental Veterinary Medicine named after K.I. Scriabin and Ya.R. Kovalenko of the Russian Academy of Sciences., Selezneva EV; Vetbiochem LLC., Moskvinа AS; Research Institute for Diagnosis and Prevention of Human and Animal Diseases., Verkhovsky OA; Research Institute for Diagnosis and Prevention of Human and Animal Diseases., Aliper TI; Vetbiochem LLC.
Jazyk:	ruština
Zdroj:	Voprosy virusologii [Vopr Virusol] 2023 May 18; Vol. 68 (2), pp. 132-141. Date of Electronic Publication: 2023 May 18.
DOI:	10.36233/0507-4088-164
Abstrakt:	Introduction: Rabbit hemorrhagic disease is an acute highly contagious infection associated with two genotypes of pathogenic Lagovirus. Antibodies to major capsid protein (Vp60) are protective. The aim of the work ‒ is an evaluation of antigenic and immunogenic activity of virus-like particles (VLPs) based on recombinant major capsid proteins of both genotypes of rabbit hemorrhagic disease virus (RHDV) (recVP60-GI1 and recVP60-GI2). Materials and Methods: Baculovirus-expressed VLPs were evaluated using electron microscopy and administered to clinically healthy 1.53 month old rabbits in a dose of 50 g. Rabbits were challenged with 103 LD50 of virulent strains Voronezhsky-87 and Tula 21 days post immunization. Serum samples were tested for the presence of RHDV-specific antibodies. Results: VLPs with hemagglutination activity forming VLP 3040 nm in size were obtained in Hi-5 cell culture. Specific antibody titers in rabbits measured by ELISA were 1 : 200 to 1 : 800 on 21th day post immunization with VLPs. Immunogenic activity of recVP60-GI1 VLPs was 90 and 40%, while it was 30 and 100% for recVP60-GI2 VLPs after the challenge with RHDV genotypes 1 and 2 respectively. The immunogenicity of two VLPs in mixture reached 100%. Discussion: VLPs possess hemagglutinating, antigenic and immunogenic activity, suggesting their use as components in substances designed for RHDV specific prophylaxis in rabbits. Results of the control challenge experiment demonstrated the need to include the antigens from both RHDV genotypes in the vaccine. Conclusion: Recombinant proteins recVP60-GI1 and recVP60-GI2 form VLPs that possess hemagglutinating an antigenic activity, and provide 90100% level of protection for animals challenged with RHDV GI1 and GI2 virulent strains.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu