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Obesity Accelerates Multiple Myeloma Progression in Certain Mouse Models and in Humans.

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|March 16, 2026
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Summary
This summary is machine-generated.

Severe obesity increases multiple myeloma (MM) risk and mortality. A new high-fat diet mouse model (HFD-C57BL/6J 5TGM1-TKGFP+/Luc+) successfully mimics obesity-accelerated MM, aiding future research.

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Area of Science:

  • Oncology
  • Metabolic Diseases
  • Animal Models

Background:

  • Severe obesity is linked to increased multiple myeloma (MM) risk and patient mortality.
  • Existing mouse models have limitations in fully capturing obesity-accelerated cancer, creating a knowledge gap.

Purpose of the Study:

  • To evaluate the impact of obesity on MM progression using three distinct high-fat diet (HFD) murine models.
  • To identify a suitable preclinical model for studying obesity-driven MM.

Main Methods:

  • Tested three HFD murine MM models: SCID-beige MM.1SGFP+/Luc+ xenograft, C57BL/6J Vk*MYC syngeneic, and C57BL/6J 5TGM1-TKGFP+/Luc+ semi-syngeneic.
  • Analyzed MM incidence, serum IgG levels, and bioluminescent tumor signals in HFD-fed mice.
  • Examined clinical data from the MMRF CoMMpass study.

Main Results:

  • Only the HFD-C57BL/6J 5TGM1-TKGFP+/Luc+ model demonstrated obesity-accelerated MM.
  • HFD-fed mice in this model showed significantly higher MM incidence, IgG levels, and tumor burden.
  • Clinical data confirmed associations between obesity and increased MM patient mortality, identifying distinct gene expression profiles.

Conclusions:

  • The HFD-C57BL/6J 5TGM1-TKGFP+/Luc+ model is the first bioluminescent model to accurately represent obesity-accelerated MM in mice.
  • This model enables non-invasive tracking of tumor growth and clearance, facilitating further research into obesity's role in MM.
  • Findings support obesity as a contributing factor to human MM progression.