Cited by 27Multiple Myeloma Research and TreatmentsHistone Deacetylase Inhibitors ResearchGenomics and Chromatin Dynamics

Plasma cell dependence on histone/protein deacetylase 11 reveals a therapeutic target in multiple myeloma

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Mostofa, AGM, Distler, Allison, Meads, Mark B., Sahakian, Eva, Powers, John J., Achille, Alexandra, Noyes, David, Wright, Gabriela +23 more·2021·JCI Insight

Abstract

The clinical utility of histone/protein deacetylase (HDAC) inhibitors in combinatorial regimens with proteasome inhibitors for patients with relapsed and refractory multiple myeloma (MM) is often limited by excessive toxicity due to HDAC inhibitor promiscuity with multiple HDACs. Therefore, more selective inhibition minimizing off-target toxicity may increase the clinical effectiveness of HDAC inhibitors. We demonstrated that plasma cell development and survival are dependent upon HDAC11, suggesting this enzyme is a promising therapeutic target in MM. Mice lacking HDAC11 exhibited markedly decreased plasma cell numbers. Accordingly, in vitro plasma cell differentiation was arrested in B cells lacking functional HDAC11. Mechanistically, we showed that HDAC11 is involved in the deacetylation of IRF4 at lysine103. Further, targeting HDAC11 led to IRF4 hyperacetylation, resulting in impaired IRF4 nuclear localization and target promoter binding. Importantly, transient HDAC11 knockdown or treatment with elevenostat, an HDAC11-selective inhibitor, induced cell death in MM cell lines. Elevenostat produced similar anti-MM activity in vivo, improving survival among mice inoculated with 5TGM1 MM cells. Elevenostat demonstrated nanomolar ex vivo activity in 34 MM patient specimens and synergistic activity when combined with bortezomib. Collectively, our data indicated that HDAC11 regulates an essential pathway in plasma cell biology establishing its potential as an emerging theraputic vulnerability in MM.

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  • Treatment of MM cells with elevenostan induces apoptosis similar to downregulation of HDAC11.

    “As a result, treatment of MM cells with elevenostan, a hydroxamic acid derivative and putative selective HDAC11 inhibitor (Fig. 3), induces apoptosis similar to downregulation of HDAC11.”

    From HDACs and the epigenetic plasticity of cancer cells: target the complexity (2022) · cites this paper as Mostofa et al., 2021

  • In MM, HDAC11 regulates cell proliferation and survival by controlling IRF4 acetylation.

    “In MM, HDAC11 regulates cell proliferation and survival by controlling IRF4 acetylation.”

    From HDACs and the epigenetic plasticity of cancer cells: target the complexity (2022) · cites this paper as Mostofa et al., 2021

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Authors
Mostofa, A., Distler, A., Meads, M. B., Sahakian, E., Powers, J. J., Achille, A., Noyes, D., Wright, G., Fang, B., Izumi, V., Koomen, J., Rampakrishnan, R., Nguyen, T. P., De Avila, G., Silva, A. S., Sudalagunta, P., Canevarolo, R. R., Siqueira Silva, M. D. C., Alugubelli, R. R., Dai, H. A., Kulkarni, A., Dalton, W. S., Hampton, O. A., Welsh, E. A., Teer, J. K., Tungesvik, A., Wright, K. L., Pinilla-Ibarz, J., Sotomayor, E. M., Shain, K. H., & Brayer, J.
Affiliations
  • Immunology Program,
  • Department of Malignant Hematology,
  • Proteomics & Metabolomics Core Facility, and
  • Chemical Biology and Molecular Medicine Program,
  • Moffitt Cancer Center (US)
  • Department of Cancer Physiology, Moffitt Cancer Center & Research Institute, Tampa, Florida, USA.
  • George Washington University (US)
  • M2Gen, Tampa, Florida, USA.
Corresponding author
Brayer, Jason
Venue
JCI Insight
Published
2021-12-22
Volume
6
Issue
24
ISSN
2379-3708 (ISSN-L)
OpenAlex
W3214304478
Cited by
27
References
68
Citations by year
2026: 9 · 2025: 7 · 2024: 2 · 2023: 2 · 2022: 7
FWCI
1.80
Type
journal article
Language
en
Open access
Locations
  • JCI Insight (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
H. Lee Moffitt Cancer Center and Research Institute (N/A)
Topics
  • Health Sciences › Medicine › Hematology › Multiple Myeloma Research and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Histone Deacetylase Inhibitors Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
HDAC11, multiple myeloma, plasma cells, IRF4, histone deacetylase inhibitors, plasma cell differentiation, bortezomib combination therapy, therapeutic target
MeSH terms
Animals, Histones, Humans, Multiple Myeloma, Plasma Cells, Mice, Histone Deacetylase Inhibitors

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