B3GAT1 and cytomegalovirus infection: Our results showing that CD57+ T-cells are mainly expanded in CMV-seropositive individuals, and maintain cytokine production and polyfunctionality independently of age, suggest that CD57+ T-cells may contribute to the promotion of adverse inflammatory outcomes, such as late graft dysfunction, chronic kidney rejection, cancer, and atherosclerosis observed after kidney transplant associated with CMV infection.