PMID- 27030315 OWN - NLM STAT- MEDLINE DCOM- 20170505 LR - 20211204 IS - 1365-2141 (Electronic) IS - 0007-1048 (Print) IS - 0007-1048 (Linking) VI - 174 IP - 1 DP - 2016 Jul TI - Post-transplant bendamustine reduces GvHD while preserving GvL in experimental haploidentical bone marrow transplantation. PG - 102-16 LID - 10.1111/bjh.14034 [doi] AB - Advances in haploidentical bone marrow transplantation (h-BMT) have drastically broadened the treatment options for patients requiring BMT. The possibility of significantly reducing the complications resulting from graft-versus-host disease (GvHD) with the administration of post-transplant cyclophosphamide (PT-CY) has substantially improved the efficacy and applicability of T cell-replete h-BMT. However, higher frequency of disease recurrence remains a major challenge in h-BMT with PT-CY. There is a critical need to identify novel strategies to prevent GvHD while sparing the graft-versus-leukaemia (GvL) effect in h-BMT. To this end, we evaluated the impact of bendamustine (BEN), given post-transplant, on GvHD and GvL using clinically relevant murine h-BMT models. We provide results indicating that post-transplant bendamustine (PT-BEN) alleviates GvHD, significantly improving survival, while preserving engraftment and GvL effects. We further document that PT-BEN can mitigate GvHD even in the absence of Treg. Our results also indicate that PT-BEN is less myelosuppressive than PT-CY, significantly increasing the number and proportion of CD11b(+) Gr-1(hi) cells, while decreasing lymphoid cells. In vitro we observed that BEN enhances the suppressive function of myeloid-derived suppressor cells (MDSCs) while impairing the proliferation of T- and B-cells. These results advocate for the consideration of PT-BEN as a new therapeutic platform for clinical implementation in h-BMT. CI - (c) 2016 John Wiley & Sons Ltd. FAU - Stokes, Jessica AU - Stokes J AD - Department of Pediatrics, University of Arizona, Tucson, Arizona. FAU - Hoffman, Emely A AU - Hoffman EA AD - Department of Pediatrics, University of Arizona, Tucson, Arizona. FAU - Zeng, Yi AU - Zeng Y AD - Department of Pediatrics, University of Arizona, Tucson, Arizona. AD - University of Arizona Cancer Center, University of Arizona, Tucson, Arizona. FAU - Larmonier, Nicolas AU - Larmonier N AD - Department of Pediatrics, University of Arizona, Tucson, Arizona. AD - Department of Immunobiology, University of Arizona, Tucson, Arizona. AD - University of Arizona Cancer Center, University of Arizona, Tucson, Arizona. FAU - Katsanis, Emmanuel AU - Katsanis E AD - Department of Pediatrics, University of Arizona, Tucson, Arizona. AD - Department of Immunobiology, University of Arizona, Tucson, Arizona. AD - Department of Medicine, University of Arizona, Tucson, Arizona. AD - Department of Pathology, University of Arizona, Tucson, Arizona. AD - University of Arizona Cancer Center, University of Arizona, Tucson, Arizona. LA - eng GR - P30 CA023074/CA/NCI NIH HHS/United States GR - R01 CA104926/CA/NCI NIH HHS/United States PT - Journal Article DEP - 20160331 PL - England TA - Br J Haematol JT - British journal of haematology JID - 0372544 RN - 8N3DW7272P (Cyclophosphamide) RN - 981Y8SX18M (Bendamustine Hydrochloride) SB - IM MH - Animals MH - Bendamustine Hydrochloride/*administration & dosage/pharmacology MH - Bone Marrow Transplantation/*methods MH - Cyclophosphamide/pharmacology MH - Graft vs Host Disease/drug therapy/*prevention & control MH - Graft vs Leukemia Effect/*drug effects MH - Histocompatibility/immunology MH - Immunosuppression Therapy MH - Mice MH - Transplantation, Homologous PMC - PMC4917459 MID - NIHMS763085 OTO - NOTNLM OT - bendamustine OT - bone marrow transplantation OT - cyclophosphamide OT - graft-versus-host disease OT - graft-versus-leukaemia COIS- The authors have declared that no conflict of interest exists. EDAT- 2016/04/01 06:00 MHDA- 2017/05/06 06:00 PMCR- 2017/07/01 CRDT- 2016/04/01 06:00 PHST- 2015/11/30 00:00 [received] PHST- 2016/01/06 00:00 [accepted] PHST- 2016/04/01 06:00 [entrez] PHST- 2016/04/01 06:00 [pubmed] PHST- 2017/05/06 06:00 [medline] PHST- 2017/07/01 00:00 [pmc-release] AID - 10.1111/bjh.14034 [doi] PST - ppublish SO - Br J Haematol. 2016 Jul;174(1):102-16. doi: 10.1111/bjh.14034. Epub 2016 Mar 31.