Immunogenicity of an adenoviral-based Middle East Respiratory Syndrome coronavirus vaccine in BALB/c mice.
A new type of coronavirus has been identified as the causative agent underlying Middle East Respiratory Syndrome (MERS). The MERS coronavirus (MERS-CoV) has spread in the Middle East, but cases originating in the Middle East have also occurred in the European Union and the USA. Eight hundred and thirty-seven cases of MERS-CoV infection have been confirmed to date, including 291 deaths. MERS-CoV has infected dromedary camel populations in the Middle East at high rates, representing an immediate source of human infection. The MERS-CoV spike (S) protein, a characteristic structural component of the viral envelope, is considered as a key target of vaccines against coronavirus infection. In an initial attempt to develop a MERS-CoV vaccine to ultimately target dromedary camels, we constructed two recombinant adenoviral vectors encoding the full-length MERS-CoV S protein (Ad5.MERS-S) and the S1 extracellular domain of S protein (Ad5.MERS-S1). BALB/c mice were immunized with both candidate vaccines intramuscularly and boosted three weeks later intranasally. All the vaccinated animals had antibody responses against spike protein, which neutralized MERS-CoV in vitro. These results show that an adenoviral-based vaccine can induce MERS-CoV-specific immune responses in mice and hold promise for the development of a preventive vaccine that targets the animal reservoir, which might be an effective measure to eliminate transmission of MERS-CoV to humans.
['Kim|Eun|E|', 'Okada|Kaori|K|', 'Kenniston|Tom|T|', 'Raj|V Stalin|VS|', 'AlHajri|Mohd M|MM|', 'Farag|Elmoubasher A B A|EA|', 'AlHajri|Farhoud|F|', 'Osterhaus|Albert D M E|AD|', 'Haagmans|Bart L|BL|', 'Gambotto|Andrea|A|']
D000256:Adenoviridae D000818:Animals D057134:Antibodies, Neutralizing D000914:Antibodies, Viral D000917:Antibody Formation D002162:Camelus D018352:Coronavirus Infections D057809:HEK293 Cells D006801:Humans D007074:Immunoglobulin G D008807:Mice, Inbred BALB C D065207:Middle East Respiratory Syndrome Coronavirus D009500:Neutralization Tests D064370:Spike Glycoprotein, Coronavirus D014765:Viral Vaccines
MERS-CoV S Adenoviral vaccines Codon-optimized