Rabies virus (RABV) causes an acute progressive viral encephalitis. Although currently licensed vaccines have an excellent safety and efficacy record, the development of a safer and more cost-effective vaccine is still being sought. An E1-deleted, replication-defective human adenovirus type 5 (HAd5) vector expressing RABV glycoprotein (HAd5-G) is thought to be a promising candidate vaccine for immune prophylaxis against rabies. Salmonella enterica serovar Typhimurium (S. Typhimurium) flagellin is a well-known immune adjuvant. In this work, we have researched the adjuvant effect of flagellins (FljB and FliC) for HAd5 in mice for the first time. We found that the recombinant HAd5 expressing RABV glycoprotein and FljB (HAd5-GB), if administered intramuscularly, but not orally, could induce stronger immune responses and provide better protection against rabies than HAd5-G or the recombinant HAd5 expressing glycoprotein and FliC (HAd5-GC). These results suggest that the recombinant HAd5-GB has potential for development as a promising rabies vaccine.
Archives of Virology – Springer Journals
Published: May 26, 2017
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