Cited by 202Bone Metabolism and DiseasesHedgehog Signaling Pathway StudiesBone health and osteoporosis research

Hedgehog Signaling in Mature Osteoblasts Regulates Bone Formation and Resorption by Controlling PTHrP and RANKL Expression

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Mak, Kinglun Kingston, Bi, Yanming, Wan, Chao, Chuang, Pao-Tien, Clemens, Thomas, Young, Marian, Yang, Yingzi·2008·Developmental Cell

Abstract

Hedgehog (Hh) signaling is required for osteoblast differentiation from mesenchymal progenitors during endochondral bone formation. However, the role of Hh signaling in differentiated osteoblasts during adult bone homeostasis remains to be elucidated. We found that in the postnatal bone, Hh signaling activity was progressively reduced as osteoblasts mature. Upregulating Hh signaling selectively in mature osteoblasts led to increased bone formation and excessive bone resorption. As a consequence, these mutant mice showed severe osteopenia. Conversely, inhibition of Hh signaling in mature osteoblasts resulted in increased bone mass and protection from bone loss in older mice. Cellular and molecular studies showed that Hh signaling indirectly induced osteoclast differentiation by upregulating osteoblast expression of PTHrP, which promoted RANKL expression via PKA and its target transcription factor CREB. Our results demonstrate that Hh signaling in mature osteoblasts regulates both bone formation and resorption and that inhibition of Hh signaling reduces bone loss in aged mice.

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Crossref · 10.1016/j.devcel.2008.02.003

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  • Hedgehog signaling is important for maintaining bone homeostasis in adult mice, with down-regulation of hedgehog signaling being protective against bone loss.

    “In addition to the roles that IHH and SHH play in regulating bone development, hedgehog signaling is also important for maintaining bone homeostasis in adult mice, with down-regulation of hedgehog signaling being protective against bone loss (41, 42).”

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Authors
Mak, K. K., Bi, Y., Wan, C., Chuang, P.-T., Clemens, T., Young, M., & Yang, Y.
Affiliations
  • National Human Genome Research Institute (US)
  • National Institute of Dental and Craniofacial Research (US)
  • University of Alabama at Birmingham (US)
  • University of California, San Francisco (US)
Corresponding author
Yang, Yingzi
Venue
Developmental Cell
Publisher
Elsevier BV
Published
2008-05
Volume
14
Issue
5
Pages
674-688
ISSN
1534-5807 (ISSN-L)
OpenAlex
W2092827845
Cited by
202
References
69
Citations by year
2026: 6 · 2025: 8 · 2024: 8 · 2023: 9 · 2022: 8 · 2021: 11 · 2020: 18 · 2019: 8 · 2018: 13 · 2017: 10 · 2016: 14 · 2015: 14 · 2014: 11 · 2013: 14 · 2012: 10
FWCI
5.49
Type
journal article
Language
en
Open access
Locations
  • Developmental Cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Dental and Craniofacial Research (HL66600, HL67822, R01 AR049410)
  • National Institutes of Health
  • National Human Genome Research Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Hedgehog Signaling Pathway Studies
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
Keywords
Hedgehog signaling, bone formation, bone resorption, parathyroid hormone-related protein, RANKL, osteoclastogenesis, pKa, CREB, bone homeostasis, osteopenia, aging, bone loss
MeSH terms
Animals, Bone Diseases, Metabolic, Bone Resorption, Cell Differentiation, Cell Survival, Gene Expression Regulation, Organ Size, Osteoblasts, Osteoclasts, Osteogenesis, Signal Transduction, Up-Regulation, Cyclic AMP Response Element-Binding Protein, Cyclic AMP-Dependent Protein Kinases, Parathyroid Hormone-Related Protein, Cell Proliferation, Mice, RANK Ligand, Hedgehog Proteins

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