Summary:
A prospective randomized trial was conducted to study the timing of high-dose intravenous melphalan and autologous stem cell transplantation (HDM/SCT) in AL amyloidosis. In all, 100 newly diagnosed patients were randomized to receive HDM/SCT, either as initial therapy (Arm-1) or following two cycles of oral melphalan and prednisone (Arm-2). The objectives of the trial were to compare survival and hematologic and clinical responses. With a median follow-up of 45 months (range 24–70), the overall survival was not significantly different between the two treatment arms (P=0.39). The hematologic response and organ system improvements after treatment did not differ between the two groups. Fewer patients received HDM/SCT in Arm-2 because of disease progression during the oral chemotherapy phase of the study, rendering them ineligible for subsequent high-dose therapy. This affected patients with cardiac involvement particularly, and led to a trend for an early survival disadvantage in Arm-2. Hence, newly diagnosed patients with AL amyloidosis eligible for HDM/SCT did not benefit from initial treatment with oral melphalan and prednisone, and there was a survival disadvantage for patients with cardiac involvement if HDM/SCT was delayed by initial oral chemotherapy.
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Acknowledgements
This work was supported by grants from the Food and Drug Administration (FD-R-001346), the National Institute of Health (HL 68705), the Gerry Foundation, and the Amyloid Research Fund at Boston University. Dr Seldin is a scholar of the Leukemia and Lymphoma Society of America. Results of this study were presented at the 43rd Annual Meeting of the American Society of Hematology. We gratefully acknowledge the numerous current and former colleagues in the Amyloid Treatment and Research Program, Clinical Trials Office and the Center for Cancer and Blood Disorders at Boston University Medical Center, who assisted with the multidisciplinary evaluation and treatment of the patients with AL amyloidosis. We thank Dr Michael LaValley for assistance with study design and randomization of participants.
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Sanchorawala, V., Wright, D., Seldin, D. et al. High-dose intravenous melphalan and autologous stem cell transplantation as initial therapy or following two cycles of oral chemotherapy for the treatment of AL amyloidosis: results of a prospective randomized trial. Bone Marrow Transplant 33, 381–388 (2004). https://doi.org/10.1038/sj.bmt.1704346
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DOI: https://doi.org/10.1038/sj.bmt.1704346
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