Immune responses of two recombinant adenoviruses expressing VP1 antigens of FMDV fused with porcine granulocyte macrophage colony-stimulating factor.
Foot-and-mouth disease (FMD) is a highly contagious and economically devastating vesicular disease of cloven-hoofed animals. In the present report, we constructed and characterized the immune responses conferred by two recombinant adenoviruses expressing VP1 epitopes (three amino acid residues 21-60, 141-160 and 200-213 in VP1, designated VPe) or VP1 protein of FMDV fused with porcine granulocyte macrophage colony-stimulating factor (named rAd-GMCSF-VPe and rAd-GMCSF-VP1). Seven groups of female BALB/c mice each containing 18 mice were inoculated subcutaneously twice at 2-week intervals with the recombinant adenoviruses. Then the protective efficacy of the two adenoviruses was detected in guinea pigs and swine. The results showed that the highest levels of FMDV-specific T cell proliferation, IFN-gamma and IL-4 could be induced by rAd-GMCSF-VPe expressing fusion GMCSF-VPe, and the highest level of FMDV-specific humoral immune responses could be induced by rAd-GMCSF-VP1 expressing fusion GMCSF-VP1 in mice. All guinea pigs and swine co-administrated with rAd-GMCSF-VPe and rAd-GMCSF-VP1 were protected from viral challenge, even though the neutralizing antibody titers were significantly lower than those in the group inoculated with inactivated FMD vaccine. It demonstrated that co-administration of rAd-GMCSF-VPe and rAd-GMCSF-VP1 might be attractive candidate vaccines for preventing FMDV infection.
Du
Yijun
Y
Key Laboratory of Animal Diseases Diagnostic and Immunology, College of Veterinary Medicine, Nanjing Agricultural University, Ministry of Agriculture, Nanjing 210095, China.
Jiang
Ping
P
Li
Yufeng
Y
He
Hairong
H
Jiang
Wenming
W
Wang
Xinglong
X
Hong
Weibin
W
D000256:Adenoviridae / Q000235:genetics* / Q000276:immunology / Q000378:metabolism; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D036022:Capsid Proteins / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D002460:Cell Line; D006224:Cricetinae; D005260:Female; D005536:Foot-and-Mouth Disease / Q000276:immunology / Q000517:prevention & control; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D006168:Guinea Pigs; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D009500:Neutralization Tests; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000276:immunology* / Q000378:metabolism; D013552:Swine; D013601:T-Lymphocytes / Q000276:immunology*; D014765:Viral Vaccines
D000914:Antibodies, Viral; D036022:Capsid Proteins; D011993:Recombinant Fusion Proteins; C442501:VP1 protein, Foot-and-mouth disease virus; D014765:Viral Vaccines; D016178:Granulocyte-Macrophage Colony-Stimulating Factor