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Abstract
We report the clinical results of sustainedly integrating imatinib and interferon-α into maintenance therapy in the patients ineligible for allogeneic hematopoietic stem cell transplantation (allo-HSCT). Maintenance therapy lasted for 5 years with imatinib 400 mg daily, interferon-α 3 million units, 2∼3 doses per week, and chemotherapy including vindesine and dexamethasone scheduled monthly in first year, once every 2 months in second year, and once every 3 months in third year. The chemotherapy was discontinued after 3 years and the imatinib and interferon-α continued for another 2 years. For 41 patients without allo-HSCT with a median follow-up of 32 months, the 3-year DFS and OS were 42.7 ± 8.6% and 57.9 ± 8.4%, respectively. Our study suggests that sustaining maintenance with low-dose chemotherapy, imatinib and interferon-α improved survival of adult Philadelphia-positive acute lymphoblastic leukemia (Ph + ALL) patients ineligible for allo-HSCT, and even provided an opportunity for cure. BCR/ABL persistent negativity at 6 and 9 months may have benefit to choose suitable patients for the imatinib/interferon-α maintenance strategy.
Acknowledgements
We would like to thank all of the participants in this study, including patients, nurses and laboratory technicians for their contributions. This study is supported by the Grant of National Public Health Grand Research Foundation (No.201202017) and the Grant of National Science and Technology Pillar Program, the Ministry of Science and Technology of China (Grant No. 2008BAI61B01).
Potential conflict of interest:
Disclosure forms provided by the authors are available with the full text of this article at http://dx.doi.org/10.3109/10428194.2016.1144882.