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The Effect of Mycophenolate Mofetil Dose per Kilogram on Clinical Outcomes of Allogeneic Hematopoietic Cell Transplant with Post-Transplant Cyclophosphamide

Year: 2020

Type: article

Abstract: Introduction Mycophenolate mofetil (MMF) dose/kg can influence clinical outcomes of allogeneic hematopoietic cell transplantation (HCT) including acute graft-versus-host disease (GVHD) (Harnicar BBMT 2015; Bejanyan BBMT 2018). When used for GVHD prophylaxis in conjunction with post-transplant cyclophosphamide (PTCy), MMF is generally dosed at 15 mg/kg three times daily (capped at a maximum of 3 g/day) and combined with either tacrolimus or sirolimus. Thus, many adults receive the maximum dose and a variable dose/kg of MMF. Objectives We sought to investigate the impact of MMF dose/kg on clinical outcomes of HCT in the setting of PTCy-based GVHD prophylaxis, where the effect of MMF dose/kg is unknown. Methods Included are 112 consecutive adult patients with hematologic malignancies who received myeloablative (n=70) or reduced intensity (n=42) HCT at the Moffitt Cancer Center between 2012-2018 with T-cell replete peripheral blood stem cells (n=94) or bone marrow (n=18). GVHD prophylaxis consisted of PTCy/MMF and either tacrolimus (n=57) or sirolimus (n=55). MMF dose relative to patient actual body weight (mg/kg/day), was stratified by tertiles into low ( 40 mg/kg/day, n=36). Results The median age at transplant was 57.8 (range: 21-75) years. Median follow-up was 12 months (range: 0.3-39). Donors were haploidentical related (n=74), mismatched unrelated (n=26), and matched related/unrelated (n=12). MMF dose groups had similar characteristics, except the low dose group having a higher proportion of males (p Conclusion In patients receiving PTCy based GVHD prophylaxis, MMF dose/kg had no significant effect on GVHD. However, lower MMF dose/kg was associated with worse DFS. This study suggests that

Source: Transplantation and Cellular Therapy

DOI: 10.1016/j.bbmt.2019.12.754