EurekAlert! -- Initial results of a study conducted at 100 centers worldwide indicate that belatacept, a first-in-class costimulation blocker can prevent the immune system rejecting new organs. The results also suggest that it may provide similar patient and graft survival to cyclosporine but with fewer side effects and superior kidney function after 12 months. The study, published today in the American Journal of Transplantation, provides the first findings to come from BENEFIT (Belatacept Evaluation of Nephroprotection and Efficacy as First-line Immunosuppression Trial).