Cited by 21Multiple Myeloma Research and TreatmentsChronic Lymphocytic Leukemia ResearchLymphoma Diagnosis and Treatment

IgM-MM is predominantly a pre–germinal center disorder and has a distinct genomic and transcriptomic signature from WM

Open access
Bazarbachi, Abdul Hamid, Avet-Loiseau, Hervé, Szalat, Raphael, Samur, Anil Aktas, Hunter, Zachary, Shammas, Masood, Corre, Jill, Fulciniti, Mariateresa +6 more·2021·Blood

Abstract

Immunoglobulin M (IgM) multiple myeloma (MM) is a rare disease subgroup. Its differentiation from other IgM-producing gammopathies such as Waldenström macroglobulinemia (WM) has not been well characterized but is essential for proper risk assessment and treatment. In this study, we investigated genomic and transcriptomic characteristics of IgM-MM samples using whole-genome and transcriptome sequencing to identify differentiating characteristics from non–IgM-MM and WM. Our results suggest that IgM-MM shares most of its defining structural variants and gene-expression profiling with MM, but has some key characteristics, including t(11;14) translocation, chromosome 6 and 13 deletion as well as distinct molecular and transcription-factor signatures. Furthermore, IgM-MM translocations were predominantly characterized by VHDHJH recombination-induced breakpoints, as opposed to the usual class-switching region breakpoints; coupled with its lack of class switching, these data favor a pre–germinal center origin. Finally, we found elevated expression of clinically relevant targets, including CD20 and Bruton tyrosine kinase, as well as high BCL2/BCL2L1 ratio in IgM-MM, providing potential for targeted therapeutics.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1182/blood.2021011452

Cites

25 of 25 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Rare IgM-MM lacks class switching.

    “coupled with its lack of class switching, these data favor a rare pre-GC origin.66”

    From Evolution of Multiple Myeloma from a Genomic Perspective (2026) · cites this paper as [66]

    The Driver mutations section reports that most IgM-MM samples (73%) lacked the class-switch deletions seen in IgG/IgA-MM. It also says four samples appeared to have fully class switched, although their cells exclusively produced IgM. Thus, lack of class switching is supported as a predominant pattern, not an absolute one. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • The VHDHJH breakpoints and lack of class switching in rare IgM-MM favor a rare pre-germinal-center origin.

    “coupled with its lack of class switching, these data favor a rare pre-GC origin.66”

    From Evolution of Multiple Myeloma from a Genomic Perspective (2026) · cites this paper as [66]

  • In rare IgM-MM, IgH translocations are predominantly characterized by VHDHJH recombination-induced breakpoints, as opposed to the usual class-switching region breakpoints.

    “In rare cases of IgM-MM, IgH translocations are predominantly characterized by VHDHJH recombination-induced breakpoints, as opposed to the usual class-switching region breakpoints;”

    From Evolution of Multiple Myeloma from a Genomic Perspective (2026) · cites this paper as [66]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. M.K.S., 0000-0002-9978-5682. Correspondence: Mehmet Kemal Samur, Dana-Farber Cancer Institute, Harvard T.H. Chan School of Public Health, 450 Brookline Ave, Boston, MA 02215; e-mail: mehmet_samur@dfci.harvard.edu; and Nikhil C. Munshi, Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Ave, Boston, MA 02215; e-mail: nikhil_munshi@dfci.harvard. edu. Footnotes Submitted 28 February 2021; accepted 18 August 2021; prepublished online on Blood First Edition 31 August 2021. DOI 10.1182/ blood.2021011452.

Cited by

Sorted by citations

Authors
Bazarbachi, A. H., Avet-Loiseau, H., Szalat, R., Samur, A. A., Hunter, Z., Shammas, M., Corre, J., Fulciniti, M., Anderson, K. C., Parmigiani, G., Treon, S. P., Mohty, M., Munshi, N. C., & Samur, M. K.
Affiliations
  • Albert Einstein College of Medicine (US)
  • University Cancer Center of Toulouse, Institut National de la Santé, Toulouse, France;
  • Boston University (US)
  • Department of Data Science, Dana-Farber Cancer Institute, Boston, MA;
  • Harvard University (US)
  • Inserm (FR)
Venue
Blood
Published
2021-11-18
Volume
138
Issue
20
Pages
1980-1985
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W3196948396
Cited by
21
References
25
Citations by year
2026: 1 · 2025: 4 · 2024: 3 · 2023: 6 · 2022: 6 · 2021: 1
FWCI
2.61
Type
journal article
Language
en
Open access
Locations
  • Blood (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Funders
  • U.S. Department of Veterans Affairs (I01 BX001584)
  • National Institutes of Health (CA100707)
  • National Cancer Institute (P50CA100707, P01CA155258, CA100707)
Topics
  • Health Sciences › Medicine › Hematology › Multiple Myeloma Research and Treatments
  • Health Sciences › Medicine › Genetics › Chronic Lymphocytic Leukemia Research
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Lymphoma Diagnosis and Treatment
Keywords
Waldenström macroglobulinemia, structural variants, gene expression profiling, CD20, Bruton's tyrosine kinase, targeted therapy
MeSH terms
Humans, Immunoglobulin M, Waldenstrom Macroglobulinemia, Multiple Myeloma, Mutation, Translocation, Genetic, Germinal Center, DNA Copy Number Variations, Transcriptome

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review