Cited by 477Genetic and Kidney Cyst DiseasesBone Metabolism and DiseasesCellular Mechanics and Interactions

Primary cilia mediate mechanosensing in bone cells by a calcium-independent mechanism

Open access
Malone, Amanda M. D., Anderson, Charles T., Tummala, Padmaja, Kwon, Ronald Y., Johnston, Tyler R., Stearns, Tim, Jacobs, Christopher R.·2007·Proceedings of the National Academy of Sciences

Abstract

Primary cilia are sensory organelles that translate extracellular chemical and mechanical cues into cellular responses. Bone is an exquisitely mechanosensitive organ, and its homeostasis depends on the ability of bone cells to sense and respond to mechanical stimuli. One such stimulus is dynamic fluid flow, which triggers biochemical and transcriptional changes in bone cells by an unknown mechanism. Here we report that bone cells possess primary cilia that project from the cell surface and deflect during fluid flow and that these primary cilia are required for osteogenic and bone resorptive responses to dynamic fluid flow. We also show that, unlike in kidney cells, primary cilia in bone translate fluid flow into cellular responses in bone cells independently of Ca 2+ flux and stretch-activated ion channels. These results suggest that primary cilia might regulate homeostasis in diverse tissues by allowing mechanical signals to alter cellular activity via tissue-specific pathways. Our identification of a mechanism for mechanotransduction in bone could lead to therapeutic approaches for combating bone loss due to osteoporosis and disuse.

Integrity signals

Registry

Crossref · 10.1073/pnas.0700636104

Cites

102 of 102 references verified0 citation errors · 0 not checkable

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  • Osteocytes might sense FFSS through collagen hillocks, β3 and β1 integrins, primary cilia, connexin43, and mechanosensitive ion channels such as Piezo1.

    “Osteocytes might sense FFSS through 1. “collagen hillocks”, which are collagen matrix projections in osteocyte canaliculi that directly link the matrix to osteocyte dendrites;29 2. β3 and β1 integrins, which participate to focal adhesion kinase (FAK) complex formation in osteocyte dendritic projections;30 3. primary cilia, which have a flow-sensing function that leads to increased osteoprotegerin”

Cites

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Research works printed but not linked: 2

  1. GC Reilly, TR Haut, CE Yellowley, HJ Donahue, CR Jacobs Biorheology 40, 591–603 (2003).
  2. 10.1097/00006534-200301000-00037 · DOI

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Authors
Malone, A. M. D., Anderson, C. T., Tummala, P., Kwon, R. Y., Johnston, T. R., Stearns, T., & Jacobs, C. R.
Affiliations
  • VA Palo Alto Health Care System (US)
  • Stanford University (US)
  • Stanford Medicine (US)
Venue
Proceedings of the National Academy of Sciences
Published
2007-08-14
Volume
104
Issue
33
Pages
13325-13330
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2104440688
Cited by
477
References
102
Citations by year
2026: 17 · 2025: 11 · 2024: 9 · 2023: 20 · 2022: 21 · 2021: 24 · 2020: 32 · 2019: 21 · 2018: 19 · 2017: 26 · 2016: 33 · 2015: 27 · 2014: 24 · 2013: 36 · 2012: 40
FWCI
15.53
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • University of Missouri
  • National Institutes of Health
  • National Institute of General Medical Sciences (R01GM052022)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR-45989, R01AR045989)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Kidney Cyst Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
Keywords
primary cilia, mechanosensing, mechanotransduction, bone cells, fluid flow, osteogenic differentiation, bone resorption, calcium-independent signaling, stretch-activated channels, bone homeostasis, osteoporosis, disuse bone loss
MeSH terms
Animals, Base Sequence, Calcium, Cilia, Fluorescent Antibody Technique, Osteoblasts, Blotting, Western, 3T3 Cells, DNA Primers, Mechanotransduction, Cellular, TRPP Cation Channels, Mice

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