Cited by 158Bone Metabolism and DiseasesBone health and osteoporosis researchHistone Deacetylase Inhibitors Research

HDAC5 Controls MEF2C-Driven Sclerostin Expression in Osteocytes

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Wein, Marc N, Spatz, Jordan, Nishimori, Shigeki, Doench, John, Root, David, Babij, Philip, Nagano, Kenichi, Baron, Roland +4 more·2015·Journal of Bone and Mineral Research

Abstract

Osteocytes secrete paracrine factors that regulate the balance between bone formation and destruction. Among these molecules, sclerostin (encoded by the gene SOST) inhibits osteoblastic bone formation and is an osteoporosis drug target. The molecular mechanisms underlying SOST expression remain largely unexplored. Here, we report that histone deacetylase 5 (HDAC5) negatively regulates sclerostin levels in osteocytes in vitro and in vivo. HDAC5 shRNA increases, whereas HDAC5 overexpression decreases SOST expression in the novel murine Ocy454 osteocytic cell line. HDAC5 knockout mice show increased levels of SOST mRNA, more sclerostin-positive osteocytes, decreased Wnt activity, low trabecular bone density, and reduced bone formation by osteoblasts. In osteocytes, HDAC5 binds and inhibits the function of MEF2C, a crucial transcription factor for SOST expression. Using chromatin immunoprecipitation, we have mapped endogenous MEF2C binding in the SOST gene to a distal intergenic enhancer 45 kB downstream from the transcription start site. HDAC5 deficiency increases SOST enhancer MEF2C chromatin association and H3K27 acetylation and decreases recruitment of corepressors NCoR and HDAC3. HDAC5 associates with and regulates the transcriptional activity of this enhancer, suggesting direct regulation of SOST gene expression by HDAC5 in osteocytes. Finally, increased sclerostin production achieved by HDAC5 shRNA is abrogated by simultaneous knockdown of MEF2C, indicating that MEF2C is a major target of HDAC5 in osteocytes. © 2014 American Society for Bone and Mineral Research.

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  • FFSS induces the disruption of the FAK-integrin complex, thereby inhibiting HDAC4/5, a negative regulator of SOST expression in osteocytes modulated by PTH treatment.

    “Recently, Sato et al.20,44 showed that FFSS induces the disruption of the FAK-integrin complex, thereby inhibiting histone deacetylase 4/5 (HDAC4/5), a negative regulator of SOST expression in osteocytes45 modulated by parathyroid hormone (PTH) treatment.46”

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Authors
Wein, M. N., Spatz, J., Nishimori, S., Doench, J., Root, D., Babij, P., Nagano, K., Baron, R., Brooks, D., Bouxsein, M., Pajevic, P. D., & Kronenberg, H. M.
Affiliations
  • Massachusetts General Hospital (US)
  • Broad Institute (US)
  • Amgen (United States) (US)
  • Harvard University (US)
Corresponding author
Kronenberg, Henry M
Venue
Journal of Bone and Mineral Research
Published
2014-10-01
Volume
30
Issue
3
Pages
400-411
ISSN
  • 0884-0431 (ISSN-L)
  • 1523-4681
OpenAlex
W2151454340
Cited by
158
References
64
Citations by year
2026: 11 · 2025: 6 · 2024: 7 · 2023: 10 · 2022: 12 · 2021: 17 · 2020: 18 · 2019: 14 · 2018: 10 · 2017: 25 · 2016: 15 · 2015: 11 · 2014: 2
FWCI
7.25
Type
journal article
Language
en
Open access
Locations
  • Journal of Bone and Mineral Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Institutional Repositories DataBase (IRDB) (submittedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (P01DK11794, P01DK011794, F32DK100215, T32DK007028)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (UH3AR059655)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Histone Deacetylase Inhibitors Research
Keywords
HDAC5, sclerostin, MEF2C, osteocytes, histone deacetylase, transcriptional regulation, enhancers, Wnt signaling, bone formation, osteoporosis, H3K27 acetylation, NCoR, HDAC3, chromatin binding
MeSH terms
Animals, Glycoproteins, Histone Deacetylases, Osteocytes, Mice, Knockout, Intercellular Signaling Peptides and Proteins, Adaptor Proteins, Signal Transducing, Mice, MEF2 Transcription Factors

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