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杆状病毒系统产生的病毒样颗粒可保护野兔免受欧洲棕兔综合征病毒(EBHSV)感染。

Virus-like Particles Produced in the Baculovirus System Protect Hares from European Brown Hare Syndrome Virus (EBHSV) Infection.

作者信息

Severi Giulio, Anzalone Lucia, Madeo Laura, Serroni Anna, Colabella Claudia, Di Paolo Antonella, Mangili Pier Mario, Manuali Elisabetta, Felici Andrea, Cagiola Monica, Lavazza Antonio, Capucci Lorenzo, Pezzotti Giovanni, De Giuseppe Antonio

机构信息

Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche "Togo Rosati", 06126 Perugia, Italy.

Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise "G. Caporale", 64100 Teramo, Italy.

出版信息

Vaccines (Basel). 2025 Jul 5;13(7):731. doi: 10.3390/vaccines13070731.

Abstract

European Brown Hare Syndrome (EBHS) is an acute and highly contagious viral disease of hares that causes considerable economic losses on wild and captive-reared hares. No preventive treatments are currently available to defeat the disease. Immunoprophylactic and biosafety measures could be applied to prevent EBHS only in captive-reared hares, where vaccination is proposed as an effective strategy. Due to the lack of a cellular substrate for virus growth, commercially available vaccines are autovaccines produced from inactivated liver suspensions of hares dead for EBHS. Therefore, using a recombinant vaccine based on VP60 major capsid protein seems a viable alternative to overcome such a problem. the 6xHis C-terminal tagged VP60 protein of EBHSV was expressed and produced in baculovirus, purified by affinity chromatography and the self-assembled recombinant (rEVP60-His) protein. To establish the protective properties of rEVP60-His-based VLPs, hares were immunised with 50 and 100 µg of VLPs and parenterally challenged with EBHSV. all hares vaccinated with 100 µg of VLPs survived after the experimental infection, demonstrating the excellent protective ability of this prototype VLPs-based vaccine. self-assembled EBHSV rEVP60-His protein was successfully produced following a rapid, simple, low-cost protocol. Although the protective efficacy of such VLPs were experimentally demonstrated, some key aspects remain to be clarified, including the duration of protection, the entity of the antibody response, and the ability to stimulate cell-mediated response. Last, an additional aspect to be evaluated is whether the use of an adjuvant can determine whether its presence improves the performance of the recombinant VLPs vaccine.

摘要

欧洲棕兔综合征(EBHS)是一种兔类急性且高度传染性的病毒性疾病,会给野生和圈养兔造成相当大的经济损失。目前尚无预防该疾病的治疗方法。免疫预防和生物安全措施仅可应用于圈养兔,其中疫苗接种被提议作为一种有效策略。由于缺乏用于病毒生长的细胞底物,市售疫苗是由死于EBHS的兔的灭活肝脏悬液制成的自身疫苗。因此,使用基于VP60主要衣壳蛋白的重组疫苗似乎是克服这一问题的可行替代方案。EBHSV的6xHis C末端标记的VP60蛋白在杆状病毒中表达并产生,通过亲和层析纯化得到自组装重组(rEVP60-His)蛋白。为了确定基于rEVP60-His的病毒样颗粒(VLPs)的保护特性,用50和100μg的VLPs对兔进行免疫,并通过肠胃外途径用EBHSV进行攻毒。所有接种100μg VLPs的兔在实验感染后存活,证明了这种基于VLPs的原型疫苗具有出色的保护能力。按照快速、简单、低成本的方案成功生产了自组装的EBHSV rEVP60-His蛋白。尽管此类VLPs的保护效力已通过实验得到证明,但仍有一些关键方面有待阐明,包括保护持续时间、抗体反应程度以及刺激细胞介导反应的能力。最后,另一个需要评估的方面是使用佐剂是否能确定其存在是否会提高重组VLPs疫苗的性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7b47/12299225/b94a3f7d9158/vaccines-13-00731-g001.jpg

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