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Blood, 2 April 2009, Vol. 113, No. 14, pp. 3375-3382. Prepublished online as a Blood First Edition Paper on December 8, 2008; DOI 10.1182/blood-2008-07-167379.
TRANSPLANTATION Nonmyeloablative allografting for newly diagnosed multiple myeloma: the experience of the Gruppo Italiano Trapianti di Midollo1 Division of Hematology, S Giovanni Battista Hospital, University of Torino, Torino, Italy; 2 Division of Hematology, Department of Clinical and Morphological Researches, University of Udine, Udine, Italy; 3 Division of Hematology, S Croce e Carle Hospital, Cuneo, Italy; 4 Division of Hematology, SS Antonio e Biagio Hospital, Alessandria, Italy; 5 Division of Oncology, Institute for Cancer Research and Treatment (IRCC), Candiolo, Italy; 6 Division of Hematology, Ospedali Riuniti, Bergamo, Italy; 7 Division of Hematology, Regional Hospital, Bolzano, Italy; 8 Division of Hematology, S Gerardo Hospital, University of Milano, Bicocca, Monza, Italy; 9 Division of Hematology, Ospedale Civile, Pescara, Italy; 10 Division of Hematology at the Fondazione Istituto Di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale Maggiore Policlinico, Mangiagalli e Regina Elena, Milano, Italy; 11 Division of Hematology, S Giovanni Battista Hospital, Torino, Italy; 12 Department of Medical Oncology and Hematology, Istituto Clinico Humanitas, Rozzano, Milano, Italy; 13 Division of Hematology, S Chiara Hospital, University of Pisa, Pisa, Italy; 14 Division of Hematology, University La Sapienza, Roma, Italy; 15 Division of Hematology, Istituto Nazionale Tumori, University of Milano, Milano, Italy; 16 Fred Hutchinson Cancer Research Center, University of Washington, Seattle; 17 Unità di Epidemiologia dei Tumori, S G B Hospital and CPO, Piemonte, Italy; and 18 Radiation Oncology Unit, S Giovanni Battista Hospital, University of Torino, Torino, Italy Despite recent advances, allografting remains the only potential cure for myeloma. From July 1999 to June 2005, 100 newly diagnosed patients younger than 65 years were enrolled in a prospective multicenter study. First-line treatment included vincristin, adriamycin, and dexamethasone (VAD)–based induction chemotherapy, a cytoreductive autograft (melphalan 200 mg/m2) followed by a single dose of nonmyeloablative total body irradiation and allografting from an human leukocyte antigen (HLA)–identical sibling. Primary end points were the overall survival (OS) and event-free survival (EFS) from diagnosis. After a median follow-up of 5 years, OS was not reached, and EFS was 37 months. Incidences of acute and chronic graft-versus-host disease (GVHD) were 38% and 50%, respectively. Complete remission (CR) was achieved in 53% of patients. Profound cytoreduction (CR or very good partial remission) before allografting was associated with achievement of posttransplantation CR (hazard ratio [HR] 2.20, P = .03) and longer EFS (HR 0.33, P < .01). Conversely, development of chronic GVHD was not correlated with CR or response duration. This tandem transplantation approach allows prolonged survival and long-term disease control in patients with reduced tumor burden at the time of allografting. We are currently investigating the role of "new drugs" in intensifying pretransplantation cytoreduction and posttransplantation graft-versus-myeloma effects to further improve clinical outcomes. (http://ClinicalTrials.gov; NCT-00702247.)
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