alexa Reduced-intensity conditioning regimen workshop: defining the dose spectrum. Report of a workshop convened by the center for international blood and marrow transplant research.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Giralt S

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During the 2006 BMT Tandem Meetings, a workshop was convened by the Center for International Blood and Marrow Transplant Research (CIBMTR) to discuss conditioning regimen intensity and define boundaries of reduced-intensity conditioning (RIC) before hematopoietic cell transplantation (HCT). The goal of the workshop was to determine the acceptance of available RIC definitions in the transplant community. Participants were surveyed regarding their opinions on specific statements on conditioning regimen intensity. Questions covered the "Champlin criteria," as well as operational definitions used in registry studies, exemplified in clinical vignettes. A total of 56 participants, including transplantation physicians, transplant center directors, and transplantation nurses, with a median of 12 years of experience in HCT, answered the survey. Of these, 67% agreed that a RIC regimen should cause reversible myelosuppression when administered without stem cell support, result in low nonhematologic toxicity, and, after transplantation, result in mixed donor-recipient chimerism at the time of first assessment in most patients. Likewise, the majority (71%) agreed or strongly agreed that regimens including < 500 cGy of total body irradiation as a single fraction or 800 cGy in fractionated doses, busulfan dose < 9 mg/kg, melphalan dose <140 mg/m(2), or thiotepa dose < 10 mg/kg should be considered RIC regimens. However, only 32% agreed or strongly agreed that the combination of carmustine, etoposide, cytarabine, and melphalan (BEAM) should be considered a RIC regimen. These results demonstrate that although HCT professionals have not reached a consensus on what constitutes a RIC regimen, most accept currently used criteria and operational definitions. These results support the continued use of current criteria for RIC regimens until a consensus statement can be developed.

This article was published in Biol Blood Marrow Transplant. and referenced in Journal of Stem Cell Research & Therapy

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