Virus-specific intestinal IFN-gamma producing T cell responses induced by human rotavirus infection and vaccines are correlated with protection against rotavirus diarrhea in gnotobiotic pigs.
We examined rotavirus-specific IFN-gamma producing CD4+, CD8+ and CD4+CD8+ T cell responses in gnotobiotic pigs infected with a virulent human rotavirus (VirHRV) or vaccinated with an attenuated (Att) HRV vaccine (AttHRV3x or AttHRV2x) or an AttHRV oral priming and 2/6-virus-like particle (VLP) intranasal boosting (AttHRV-2/6VLP) regimen. In VirHRV infected pigs, HRV-specific IFN-gamma producing T cells reside primarily in ileum. AttHRV-2/6VLP induced similar frequencies of intestinal IFN-gamma producing T cells as the VirHRV, whereas AttHRV3x or 2x vaccines were less effective. Protection rates against rotavirus diarrhea upon VirHRV challenge significantly correlated (r=0.97-1.0, p<0.005) with frequencies of intestinal IFN-gamma producing T cells, suggesting their role in protective immunity.
Yuan
Lijuan
L
Food Animal Health Research Program, Ohio Agricultural Research and Development Center, Department of Veterinary Preventive Medicine, The Ohio State University, Wooster, OH 44691, USA. lyuan@vt.edu
Wen
Ke
K
Azevedo
Marli S P
MS
Gonzalez
Ana M
AM
Zhang
Wei
W
Saif
Linda J
LJ
D000281:Administration, Intranasal; D000284:Administration, Oral; D000818:Animals; D003967:Diarrhea / Q000276:immunology / Q000517:prevention & control*; D005856:Germ-Free Life; D006801:Humans; D007117:Immunization, Secondary; D007371:Interferon-gamma / Q000096:biosynthesis*; D007421:Intestine, Small / Q000276:immunology*; D012400:Rotavirus Infections / Q000276:immunology / Q000517:prevention & control*; D022243:Rotavirus Vaccines / Q000008:administration & dosage / Q000276:immunology*; D013552:Swine; D016176:T-Lymphocyte Subsets / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D014613:Vaccines, Attenuated / Q000008:administration & dosage / Q000276:immunology
D022243:Rotavirus Vaccines; D014613:Vaccines, Attenuated; D007371:Interferon-gamma