[Renal xenotransplantation : state of the art].

Xenotransplantation could be an inexhaustible source of organs and change the life of end-stage kidney disease patients with reduction of morbidity and mortality. Through genetic engineering it is now possible to reduce the risk of hyperacute and acute graft rejection and improve the overall immune compatibility between two different species. Some experiments have already brought promising perspectives. Nevertheless, there are still difficulties to overcome. The risk of animal-related infectious diseases, ethnic limitations, safety, and applicability of large-scale xenotransplantation should be assessed. We still need to improve the technical aspects and define the purpose of these procedures: definitive replacement or temporary solution?