Association of the BoLA-DRB3 alleles with peripheral blood mononuclear cell proliferation in response to Staphylococcusaureus

The aim of this study was to investigate the association of bovine leukocyte antigen-DRB3 alleles with peripheral blood mononuclear cell (PBMC) proliferation in response to Staphylococcus aureus. The animals included in this study (n=347) were approximately of same age and comprised of F2 Holstein-Friesian ´ Charolais (n = 155), Holstein-Friesian backcross (F0 Holstein-Friesian dams crossed with unrelated F1 sires, n = 60), Charolais backcross (F1 dams crossed with F0 Charolais sire, n=46) and pure Holstein-Friesian (n = 86). A sequence-based typing method was used in order to determine the genotype of the animals at BoLA-DRB3 locus and a linear mixed model was used to evaluate the association of bovine leukocyte antigen-DRB3 alleles with peripheral blood mononuclear cell (PBMC) proliferation. Beside the BoLA-DRB3 alleles, fixed effects of genetic group and gender and random effect of sires were included into the statistical model. In this research, 27 alleles were found for BoLA-DRB3 gene. The results showed that alleles BoLA-DRB3*0101 and BoLA-DRB3*0902 significantly affected on the stimulation index of S. aureus–induced peripheral blood mononuclear cell proliferation (P