The recombinant feline herpesvirus 1 expressing feline Calicivirus VP1 protein is safe and effective in cats
文献类型： 外文期刊
作者： Tang, Aoxing 1 ; Zhu, Meng 1 ; Zhu, Jie 1 ; Zhang, Da 1 ; Zhu, Shiqiang 1 ; Meng, Chunchun 1 ; Li, Chuanfeng 1 ; Liu, Guangqing 1 ;
作者机构： 1.Chinese Acad Agr Sci, Shanghai Vet Res Inst, Shanghai 200241, Peoples R China
关键词： Feline herpesvirus type 1; Feline calicivirus; Recombinant virus; Vaccine; Cat
期刊名称：VACCINE （ 影响因子：3.5； 五年影响因子：3.5 ）
ISSN： 0264-410X
年卷期： 2024 年 42 卷 26 期
页码：
收录情况： SCI
摘要： Feline herpesvirus type 1 (FHV) and feline calicivirus (FCV) are significant pathogens causing upper respiratory tract disease in cats. Existing inactivated or modified live vaccines against FCV and FHV face limitations in safety and efficacy. To overcome these challenges, a recombinant strain FHV Delta gI/gE-FCV VP1 was developed by deleting the gI/gE gene and concurrently expressing FCV VP1, using the FHV WX19 strain as the parental virus. Results indicated the presence of FCV VP1 in FHV Delta gI/gE-FCV VP1-infected CRFK cells, confirmed through protein blotting and immunofluorescence assays and virus-like particles (VLPs) of FCV were observed using transmission electron microscopy. For efficacy in cats, each animal received intranasal vaccination with 1 mL of FHV Delta gI/gE-FCV VP1 at 106 TCID50. Following completion of vaccination on day 28, animals were exposed to a potent FCV strain. Assessments included clinical signs, nasal shedding, virus neutralizing antibodies, cytokine expression and postmortem histological testing. All vaccinations with FHV Delta gI/gE-FCV VP1 were deemed safe, with significantly reduced clinical disease scores, pathological changes and viral nasal shedding following infection and robust immune responses were induced. These findings collectively suggest the effectiveness of FHV-based recombinant vaccines in preventing FCV infections.
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