Genetically modified rabies virus ERA strain is safe and induces long-lasting protective immune response in dogs after oral vaccination

文献类型： 外文期刊

第一作者： Shuai, Lei

作者： Shuai, Lei;Wang, Xijun;Ge, Jinying;Wen, Zhiyuan;Chen, Weiye;Qin, Lide;Bu, Zhigao;Feng, Na;Xia, Xianzhu

作者机构：

关键词： Rabies virus;Genetically modified rabies virus;Oral vaccine

期刊名称：ANTIVIRAL RESEARCH （ 影响因子：5.97； 五年影响因子：5.801 ）

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收录情况： SCI

摘要： Oral immunization in free-roaming dogs is one of the most practical approaches to prevent rabies for developing countries. The safe, efficient and long-lasting protective oral rabies vaccine for dogs is highly sought. In this study, rabies virus (RABV) Evelyn-Rokitnicki-Abelseth (ERA) strain wild-type (rERA) and a genetically modified type (rERAG(333E)) containing a mutation from arginine to glutamic acid at residue 333 of glycoprotein (G(333E)) were generated by reverse genetic. The recombinant virus rERAG(333E) retained growth properties of similar to the parent strain rERA in BHK-21 cell culture. The G333E mutation showed genetic stability during passage into neuroblastoma cells and in the brains of suckling mice and was significantly reduced the virulence of rERA in mice. rERAG(333E) was immunogenic in dogs by intramuscular inoculation. Mice orally vaccinated with rERAG(333E) induced strong and one year longer virus neutralizing antibodies (VNA) to RABV, and were completely protected from challenge with lethal street virus at 12 months after immunization. Dogs received oral vaccination with rERAG(333E) induced strong protective RABV VNA response, which lasted for over 3 years, and moderate saliva RABV-specific IgA. Moreover, sizeable booster responses to RABV VNA were induced by a second oral dose 1 year after the first dose. These results demonstrated that the genetically modified ERA vaccine strain has the potential to serve as a safe and efficient oral live vaccine against rabies in dogs. (C) 2015 Elsevier B.V. All rights reserved.

分类号： R37

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