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. 2014 Feb;49(2):248-53.
doi: 10.1038/bmt.2013.167. Epub 2013 Oct 28.

Acute GVHD prophylaxis with standard-dose, micro-dose or no MTX after fludarabine/melphalan conditioning

Affiliations

Acute GVHD prophylaxis with standard-dose, micro-dose or no MTX after fludarabine/melphalan conditioning

G L Chen et al. Bone Marrow Transplant. 2014 Feb.

Abstract

MTX is a standard component of acute GVHD prophylaxis. However, its use can be limited by toxicity. On the basis of disease risk, we prospectively assigned 132 consecutive patients from January 2005 to February 2011 undergoing first allogeneic hematopoietic cell transplant after conditioning with fludarabine and melphalan to acute GVHD prophylaxis with tacrolimus/MTX (TAC/MTX, N=22), TAC/micro-dose MTX/mycophenolate mofetil (TAC/μMTX/MMF, N=78) or TAC/MMF (TAC/MMF, N=32), to optimize acute GVHD prevention and decrease mortality. The median (range) follow-up was 24 (0.8-60) months. The median patient ages (range) were 37 (23-63), 56 (20-68) and 54 (22-68) years (P<0.0001) for TAC/MTX, TAC/μMTX/MMF and TAC/MMF, respectively. The 100-day cumulative incidences of grade III-IV acute GVHD were 19, 23 and 49% (P=0.015), respectively. The cumulative incidences of severe chronic GVHD at 1 year were 38, 29 and 79% (P<0.001), respectively. Regimen-related toxicities were not significantly different among the three prophylaxis regimens. PFS and OS were equivalent between the TAC/MTX and TAC/μMTX/MMF arms despite significantly older patients in the latter arm, and both had superior PFS and OS than the TAC/MMF arm. Acute GVHD prophylaxis with TAC/μMTX/MMF is as effective as TAC/MTX and superior to TAC/MMF.

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Conflict of interest statement

CONFLICT OF INTEREST

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Cumulative incidences of grade III–IV acute GVHD for TAC/MTX, TAC/μMTX/MMF and TAC/MMF. TAC/MMF results in significantly greater incidence of grade III–IV acute GVHD than TAC/MTX or TAC/μMTX/MMF (a) Acute GVHD organ involvement is greater for TAC/MMF than TAC/MTX or TAC/μMTX/MMF in the gastrointestinal tract (b) but not liver (c) or skin (d) thick line—TAC/MTX, dashed line—TAC/μMTX/MMF, thin line—TAC/MMF. Abbreviations: μMTX = micro-dose MTX (7.5 mg/m2); MMF = mycophenolate mofetil; MTX = standard-dose MTX (30–40 mg/m2); TAC = tacrolimus.
Figure 2
Figure 2
Cumulative incidences of severe cGVHD. TAC/MMF results in significantly increased incidence of severe cGVHD than TAC/MTX or TAC/μMTX/MMF. Abbreviations: cGVHD = chronic GVHD; μMTX micro-dose MTX (7.5 mg/m2); MMF = mycophenolate mofetil; MTX = standard-dose MTX (30–40 mg/m2); TAC = tacrolimus.
Figure 3
Figure 3
OS and PFS. (a) TAC/μMTX/MMF results in significantly better OS than TAC/MMF. (b) There is a trend toward improved PFS for TAC/μMTX/MMF when compared to TAC/MMF. Abbreviations: μMTX = micro-dose MTX (7.5 mg/m2); MMF = mycophenolate mofetil; MTX = standard-dose MTX (30–40 mg/m2); TAC = tacrolimus.

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