Cited by 93Histone Deacetylase Inhibitors ResearchMultiple Myeloma Research and TreatmentsEpigenetics and DNA Methylation

HDAC3 regulates DNMT1 expression in multiple myeloma: therapeutic implications

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Harada, T, Ohguchi, H, Grondin, Y, Kikuchi, S, Sagawa, M, Tai, Y-T, Mazitschek, R, Hideshima, T +1 more·2017·Leukemia

Abstract

Epigenetic signaling pathways are implicated in tumorigenesis and therefore histone deacetylases (HDACs) represent novel therapeutic targets for cancers, including multiple myeloma (MM). Although non-selective HDAC inhibitors show anti-MM activities, unfavorable side effects limit their clinical efficacy. Isoform- and/or class-selective HDAC inhibition offers the possibility to maintain clinical activity while avoiding adverse events attendant to broad non-selective HDAC inhibition. We have previously reported that HDAC3 inhibition, either by genetic knockdown or selective inhibitor BG45, abrogates MM cell proliferation. Here we show that knockdown of HDAC3, but not HDAC1 or HDAC2, as well as BG45, downregulate expression of DNA methyltransferase 1 (DNMT1) mediating MM cell proliferation. DNMT1 expression is regulated by c-Myc, and HDAC3 inhibition triggers degradation of c-Myc protein. Moreover, HDAC3 inhibition results in hyperacetylation of DNMT1, thereby reducing the stability of DNMT1 protein. Combined inhibition of HDAC3 and DNMT1 with BG45 and DNMT1 inhibitor 5-azacytidine (AZA), respectively, triggers synergistic downregulation of DNMT1, growth inhibition and apoptosis in both MM cell lines and patient MM cells. Efficacy of this combination treatment is confirmed in a murine xenograft MM model. Our results therefore provide the rationale for combination treatment using HDAC3 inhibitor with DNMT1 inhibitor to improve patient outcome in MM.

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Authors
Harada, T., Ohguchi, H., Grondin, Y., Kikuchi, S., Sagawa, M., Tai, Y.-T., Mazitschek, R., Hideshima, T., & Anderson, K. C.
Affiliations
  • Harvard University (US)
  • Massachusetts General Hospital (US)
Corresponding author
Anderson, K C
Venue
Leukemia
Published
2017-05-11
Volume
31
Issue
12
Pages
2670-2677
ISSN
  • 0887-6924 (ISSN-L)
  • 1476-5551
OpenAlex
W2613870926
Cited by
89
References
42
Citations by year
2026: 6 · 2025: 7 · 2024: 7 · 2023: 12 · 2022: 10 · 2021: 14 · 2020: 11 · 2019: 14 · 2018: 6 · 2017: 2
FWCI
3.80
Type
journal article
Language
en
Open access
Locations
  • Leukemia (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (acceptedVersion)
Funders
  • National Institutes of Health (5p01ca078378-15, 5r01ca178264-05)
  • National Cancer Institute (R01-CA178264, P01-CA078378, P50CA100707, R01CA050947, P01CA155258)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Histone Deacetylase Inhibitors Research
  • Health Sciences › Medicine › Hematology › Multiple Myeloma Research and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
Keywords
HDAC3, DNMT1, multiple myeloma, histone deacetylase inhibitors, azacitidine, c-Myc, protein stability, DNA methylation, epigenetic regulation, combination therapy, drug synergy, apoptosis, histone acetylation
MeSH terms
DNA (Cytosine-5-)-Methyltransferase 1, Histone Deacetylase 3, Acetylation, Animals, Disease Models, Animal, Histone Deacetylases, Humans, Models, Biological, Multiple Myeloma, Gene Expression Regulation, Neoplastic, Proto-Oncogene Proteins c-myc, Apoptosis, Gene Expression Profiling, Xenograft Model Antitumor Assays, RNA Interference, Cell Line, Tumor, Mice, Protein Stability, Gene Knockdown Techniques, Histone Deacetylase Inhibitors

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