Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5821922 | Antiviral Research | 2015 | 7 Pages |
Abstract
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 (rERAG333E) containing a mutation from arginine to glutamic acid at residue 333 of glycoprotein (G333E) were generated by reverse genetic. The recombinant virus rERAG333E 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. rERAG333E was immunogenic in dogs by intramuscular inoculation. Mice orally vaccinated with rERAG333E induced strong and one year longer virus neutralizing antibodies (VNA) to RABV, and were completely protected from challenge with lethal street virus at 12Â months after immunization. Dogs received oral vaccination with rERAG333E induced strong protective RABV VNA response, which lasted for over 3Â years, and moderate saliva RABV-specific IgA. Moreover, sizeable booster responses to RABV VNA were induced by a second oral dose 1Â 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.
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Virology
Authors
Lei Shuai, Na Feng, Xijun Wang, Jinying Ge, Zhiyuan Wen, Weiye Chen, Lide Qin, Xianzhu Xia, Zhigao Bu,