Rituximab in hematopoietic cell transplantation.

IMPORTANCE OF THE FIELD: The success of rituximab therapy in managing B cell malignancies supports its widespread application in both autologous and allogeneic hematopoietic cell transplantation. AREAS COVERED IN THIS REVIEW: We searched the PubMed database using the terms rituximab, stem cell transplant, autologous, or allogeneic and limited the search to clinical trials in English. In total, 92 trials were identified and 16 were reviewed in detail for significance of rituximab intervention. In this review, we will examine rituximab's emerging roles in: i) in vivo graft purging; ii) maintenance following autologous transplantation; iii) allogeneic transplant conditioning; and iv) the rationale for its use in the treatment/prevention of chronic graft-versus-host disease and post-transplant lymphoproliferative disorder. WHAT THE READER WILL GAIN: The reader will gain an understanding of the use of rituximab not only in transplants for B cell malignancies, but also its extension to other diseases where we are learning that B cells are involved in the pathogenesis. TAKE HOME MESSAGE: With rituximab firmly established in the non-transplant therapy of B cell malignancies, the new challenge in transplantation is how to incorporate the drug for optimum efficacy in those patients coming to transplant with relapse after rituximab-containing therapy.