Immunosuppressive protocols for transplantation and certain hematologic malignancies can prevent the primary immune response to the D blood group antigen

Abstract

A review of the published literature on Rh alloimmunization reveals that its incidence varies with the volume of infused D+ red blood cells (RBCs), the probable Rh genotype of the RBCs, and the immune competency of the D- recipient. Among the reports of Rh alloimmunization in different clinical circumstances, we identified five studies in which a combined total of 62 D- recipients of hematopoietic stem cell or solid-organ transplants were transfused with D+ RBCs and none (0%) formed anti-D. The observation that immunosuppressive protocols developed to prevent rejection of tissue and organ transplants also prevented alloimmunization to the D blood group antigen raises the possibility of practical applications in blood transfusion practice.