Volume 193, Issue 2 pp. 380-385
Short Report

Implications of detecting serum monoclonal protein by MASS-fix following stem cell transplantation in multiple myeloma

Jithma P. Abeykoon

Jithma P. Abeykoon

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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David L. Murray

David L. Murray

Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA

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Isaiah Murray

Isaiah Murray

Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA

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Dragan Jevremovic

Dragan Jevremovic

Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA

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Gregory E. Otteson

Gregory E. Otteson

Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA

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Angela Dispenzieri

Angela Dispenzieri

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Bonnie K. Arendt

Bonnie K. Arendt

Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA

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Surendra Dasari

Surendra Dasari

Department of Health Science and Research, Mayo Clinic, Rochester, MN, USA

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Morie Gertz

Morie Gertz

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Wilson I. Gonsalves

Wilson I. Gonsalves

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Taxiarchis V. Kourelis

Taxiarchis V. Kourelis

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Eli Muchtar

Eli Muchtar

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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David Dingli

David Dingli

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Rahma Warsame

Rahma Warsame

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Ronald S. Go

Ronald S. Go

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Martha Q. Lacy

Martha Q. Lacy

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Nelson Leung

Nelson Leung

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Francis Buadi

Francis Buadi

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Yi Lin

Yi Lin

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Robert A. Kyle

Robert A. Kyle

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Vincent Rajkumar

Vincent Rajkumar

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Shaji Kumar

Shaji Kumar

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

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Prashant Kapoor

Corresponding Author

Prashant Kapoor

Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, MN, USA

Correspondence: Prashant Kapoor, Assistant Professor of Medicine and Oncology, Mayo Clinic, Division of Hematology, 200 First Street SW, Rochester, MN 55905, USA.

E-mail: [email protected]

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First published: 20 November 2020
Citations: 14

Summary

Measurable residual disease (MRD) assessment by marrow-based next-generation flow cytometry (NGF) following autologous stem cell transplantation (ASCT) may lead to false-negative results due to patchy marrow involvement and extramedullary disease in patients with multiple myeloma. We assessed the value of simultaneous MRD evaluation with NGF and serum matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MASS-FIX). Of all 61 complete responders who were NGF-negative for MRD, around day-100 post ASCT, 59% were MASS-FIX-positive. At median follow-up of 26 months, 69% of MASS-FIX(+)/NGF(−) patients were alive and progression-free versus 96% of MASS-FIX(-)/NGF(−) patients, P = 0·02. MASS-FIX, a simple peripheral blood-based assay complements marrow-based NGF to accurately prognosticate patients with myeloma.

Conflicts of interest

David L. Murray and Surendra Dasari have intellectual property rights encompassing the MASS-FIX process which have been licensed to The Binding Site. Prashant Kapoor is a PI for research studies for which Mayo Clinic has received funding from AbbVie, Takeda, Sanofi, Janssen and Amgen. Advisory Board: Sanofi, Pharmacyclics, Cellectar and Karyopharm.

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