Bortezomib as rescue therapy for antibody mediated rejection: a single-center experience.

Case series have reported the use of bortezomib for treatment of primary and refractory treatment of cell-mediated acute rejection. The purpose of this article is to review a single-center experience with bortezomib used to treat humoral rejection in four transplant recipients. All patients received bortezomib after suffering antibody-mediated rejection refractory to intravenous immunoglobulin and plasmapheresis. Each patient had improved renal function after bortezomib treatment, biopsies became c4d negative in three of the four patients and the level of donor specific antibody reduction was mixed. Adverse drug events were not encountered, although two patients suffered infections, H1N1 pneumonia and cytomegalovirus colitis. In conclusion, these four cases demonstrate the promising use of bortezomib as rescue therapy for antibody mediated rejection. Future research is needed to explore the impact of bortezomib on HLA removal, histological reversal of rejection, and long-term graft function after transplantation.