Cited by 1,076Bone Metabolism and DiseasesBone health and osteoporosis researchWnt/β-catenin signaling in development and cancer

Osteocytes, mechanosensing and Wnt signaling

Open access
Bonewald, Lynda F., Johnson, Mark L.·2008·Bone

Abstract

The majority of bone cell biology focuses on activity on the surface of the bone with little attention paid to the activity that occurs below the surface. However, with recent new discoveries, osteocytes, cells embedded within the mineralized matrix of bone, are becoming the target of intensive investigation. In this article, the distinctions between osteoblasts and their descendants, osteocytes, are reviewed. Osteoblasts are defined as cells that make bone matrix and osteocytes are thought to translate mechanical loading into biochemical signals that affect bone (re)modeling. Osteoblasts and osteocytes should have similarities as would be expected of cells of the same lineage, yet these cells also have distinct differences, particularly in their responses to mechanical loading and utilization of the various biochemical pathways to accomplish their respective functions. For example, the Wnt/beta-catenin signaling pathway is now recognized as an important regulator of bone mass and bone cell functions. This pathway is important in osteoblasts for differentiation, proliferation and the synthesis bone matrix, whereas osteocytes appear to use the Wnt/beta-catenin pathway to transmit signals of mechanical loading to cells on the bone surface. New emerging evidence suggests that the Wnt/beta-catenin pathway in osteocytes may be triggered by crosstalk with the prostaglandin pathway in response to loading which then leads to a decrease in expression of negative regulators of the pathway such as Sost and Dkk1. The study of osteocyte biology is becoming an intense area of research interest and this review will examine some of the recent findings that are reshaping our understanding of bone/bone cell biology.

Integrity signals

Registry

Crossref · 10.1016/j.bone.2007.12.224

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  • Mechanical unloading downregulates anabolic factors and stimulates osteocytes to produce sclerostin and DKK-1 (inhibitors of osteoblast activity) and factors that stimulate local osteoclastogenesis.

    “On the other hand, mechanical unloading downregulates anabolic factors and stimulates osteocytes to produce sclerostin and DKK-1, which are inhibitors of osteoblast activity [185–188], as well as specific factors that stimulate local osteoclastogenesis [189].”

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Authors
Bonewald, L. F., & Johnson, M. L.
Affiliations
University of Missouri–Kansas City (US)
Venue
Bone
Publisher
Elsevier BV
Published
2008-04
Volume
42
Issue
4
Pages
606-615
ISSN
  • 1873-2763 (ISSN-L)
  • 8756-3282
OpenAlex
W2011828467
Cited by
1,076
References
120
Citations by year
2026: 28 · 2025: 32 · 2024: 24 · 2023: 58 · 2022: 49 · 2021: 58 · 2020: 64 · 2019: 75 · 2018: 59 · 2017: 73 · 2016: 71 · 2015: 74 · 2014: 63 · 2013: 71 · 2012: 67
FWCI
5.37
Type
journal article
Language
en
Open access
Locations
  • Bone (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR053949, P01AR046798)
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 › Wnt/β-catenin signaling in development and cancer
Keywords
osteocytes, osteoblasts, mechanosensing, Wnt/β-catenin signaling, mechanical loading, bone remodeling, prostaglandin signaling, sclerostin, DKK1, bone matrix synthesis, osteocyte differentiation
MeSH terms
Animals, Humans, Models, Biological, Osteocytes, Stress, Mechanical, Biosensing Techniques, Signal Transduction, Wnt Proteins

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