Abstract
Eltrombopag (EPAG) and romiplostim (ROM), thrombopoietin receptor-agonists with demonstrated efficacy against aplastic anemia (AA) in prospective controlled studies, were authorized in Japan for use in adults with aplastic anemia in 2017 and 2019, respectively. So far, no data are available on the potential contribution of switching from ROM to EPAG or vice versa in terms of efficacy or tolerance. Efficacies and tolerance profiles of ten patients, who failed to respond to the maximum dose of EPAG and then switched to ROM, were evaluated. All ten patients received a maximum dose of ROM (20 μg/kg/week). At a median follow-up of twelve months, seven of ten patients (70%) had achieved either neutrophil, erythroid, or platelet response, including one complete response. No patients showed platelet count fluctuations that were reported during ROM treatment for immune thrombocytopenia. In univariate analysis of the relationship between efficacy and demographics, the response had a correlation with neither factors. None of the patients stopped the ROM treatment because of adverse events. Although a larger number of patients and a longer follow-up period are needed to confirm our findings, our results show the efficacy of ROM in patients with EPAG-refractory AA.
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The authors would like to thank Editage (www.editage.com) for English language editing.
Funding
The Practical Research for Innovative Cancer Control from the Japan Agency for Medical Research and Development, AMED (19ck0106251h0003): Establishment of molecular-based risk-stratification system in acute myeloid leukemia and confirmation of its practical application and usefulness in clinics.
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Kensuke Usuki has received research funding from Astellas Pharma Inc., Alexion Pharmaceuticals, AbbVie GK, Gilead, SymBio Pharmaceuticals Ltd., Daiichi Sankyo Co., Ltd., Sumitomo Dainippon Pharma Co., Ltd., Chugai Pharmaceutical Co., Ltd., Otsuka Pharmaceutical Co., Ltd., Novartis Pharma K.K., Bristol-Myers Squibb Company, Ono Pharmaceutical Co., Ltd., Janssen Pharmaceutical K.K., Celgene Corporation, Takeda Pharmaceutical Co., Ltd., Nippon Boehringer Ingelheim Co., Ltd., Mundipharma K.K., Astellas-Amgen-Biopharma KK, Apellis Pharmaceuticals Inc, Nippon Shinyaku Co., Ltd., Kyowa Kirin Co., Ltd., and Pfizer Japan Inc., and has served on speakers bureaus for Novartis Pharma K.K., Alexion Pharmaceuticals, Eisai Co., Ltd., Ono Pharmaceutical Co., Ltd., Kyowa Kirin Co., Ltd., MSD K.K., Otsuka Pharmaceutical Co., Ltd., SymBio Pharmaceuticals Ltd., Celgene Corporation, Daiichi Sankyo Co., Ltd., Takeda Pharmaceutical Co., Ltd., Nippon Shinyaku Co., Ltd., PharmaEssentia Corp., Bristol-Myers Squibb Company, and Yakult Honsha Co. Ltd.
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Ise, M., Iizuka, H., Kamoda, Y. et al. Romiplostim is effective for eltrombopag-refractory aplastic anemia: results of a retrospective study. Int J Hematol 112, 787–794 (2020). https://doi.org/10.1007/s12185-020-02971-1
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DOI: https://doi.org/10.1007/s12185-020-02971-1