Abstract
Minimal residual disease (MRD)-negative status in multiple myeloma (MM) is associated with favorable outcomes. Although EuroFlow next-generation flow (NGF) is a global standard for MRD detection, its operating cost is high. Therefore, it is desirable to develop a less expensive method with equivalent sensitivity to that of EuroFlow-NGF. In this study, we compared the analytical ability of our BML 10-color multiparameter flow cytometry (MFC) to that of EuroFlow-NGF. Bone marrow samples collected from 51 patients with MM were subjected to MRD detection using BML 10-color-MFC and EuroFlow-NGF. Our antibody panel consisted of CD38 multiepitope, CD138, CD45, CD56, CD19, CD27, CD81, CD117, cytoplasmic immunoglobulin (cIg) κ, and cIgλ in a single tube. The median percentages of total plasma cells, as per 10-color-MFC and EuroFlow-NGF, were 0.2148% and 0.2200%, respectively, with a good correlation between the methods (r = 0.950). The median percentages of myeloma cells determined via 10-color-MFC and EuroFlow-NGF were 0.0012% and 0.0007%, respectively, with a strong correlation (r = 0.954). Our 10-color-MFC demonstrated high sensitivity to detect MRD; the results showed a good correlation with those obtained using EuroFlow-NGF. Therefore, our cost-effective single-tube MFC (approximately 100 USD/sample) is a promising alternative method for the detection of MRD in patients with MM.
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The authors thank all the participants, physicians, and staff involved in this study. We would like to thank Editage (www.editage.com) for the English language editing.
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All authors contributed to the study conception and design. Sample collection was performed by K. Sato, K. Okazuka, T. Ishida, J. Nashimoto, Y. Uto, M. Ogura, Y. Yoshiki, Y. Abe, and N. Tsukada. Material preparation, data collection, and analysis were performed by J. Sakamoto, S. Kaneko, A. Maeda, H. Hamazaki, and Y. Hiragohri. The first draft of the manuscript was written by K. Sato, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This study was approved by the Ethics Committee of the Japanese Red Cross Medical Center.
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Written informed consent was obtained from all patients, in accordance with the Declaration of Helsinki.
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K. Suzuki received personal fees from Celgene, Takeda, Ono Pharmaceuticals, Astellas, Novartis, Sanofi, Bristol Myers Squibb, Janssen, and AbbVie. T. Ishida received personal fees from Janssen, Celgene, Ono Pharmaceuticals, and Takeda. N. Tsukada received personal fees from Takeda. J. Sakamoto, S. Kaneko, A. Maeda, H. Hamazaki, and Y. Hiragohri are employees of BML, Inc. The other authors declare no conflict of interest.
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Sato, K., Okazuka, K., Ishida, T. et al. Minimal residual disease detection in multiple myeloma: comparison between BML single-tube 10-color multiparameter flow cytometry and EuroFlow multiparameter flow cytometry. Ann Hematol 100, 2989–2995 (2021). https://doi.org/10.1007/s00277-021-04634-5
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DOI: https://doi.org/10.1007/s00277-021-04634-5