Cited by 1,350Bone health and osteoporosis researchBone Metabolism and DiseasesCellular Mechanics and Interactions

Mechanical Stimulation of Bone in Vivo Reduces Osteocyte Expression of Sost/Sclerostin

Open access
Robling, Alexander G., Niziolek, Paul J., Baldridge, Lee A., Condon, Keith W., Allen, Matthew R., Alam, Imranul, Mantila, Sara M., Gluhak-Heinrich, Jelica +3 more·2008·Journal of Biological Chemistry

Abstract

Sclerostin, the protein product of the Sost gene, is a potent inhibitor of bone formation. Among bone cells, sclerostin is found nearly exclusively in the osteocytes, the cell type that historically has been implicated in sensing and initiating mechanical signaling. The recent discovery of the antagonistic effects of sclerostin on Lrp5 receptor signaling, a crucial mediator of skeletal mechanotransduction, provides a potential mechanism for the osteocytes to control mechanotransduction, by adjusting their sclerostin (Wnt inhibitory) signal output to modulate Wnt signaling in the effector cell population. We investigated the mechanoregulation of Sost and sclerostin under enhanced (ulnar loading) and reduced (hindlimb unloading) loading conditions. Sost transcripts and sclerostin protein levels were dramatically reduced by ulnar loading. Portions of the ulnar cortex receiving a greater strain stimulus were associated with a greater reduction in Sost staining intensity and sclerostin-positive osteocytes (revealed via in situ hybridization and immunohistochemistry, respectively) than were lower strain portions of the tissue. Hindlimb unloading yielded a significant increase in Sost expression in the tibia. Modulation of sclerostin levels appears to be a finely tuned mechanism by which osteocytes coordinate regional and local osteogenesis in response to increased mechanical stimulation, perhaps via releasing the local inhibition of Wnt/Lrp5 signaling.

Integrity signals

Registry

Crossref · 10.1074/jbc.m705092200

Cites

48 of 48 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • 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].”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Robling, A. G., Niziolek, P. J., Baldridge, L. A., Condon, K. W., Allen, M. R., Alam, I., Mantila, S. M., Gluhak-Heinrich, J., Bellido, T. M., Harris, S. E., & Turner, C. H.
Affiliations
  • Purdue University West Lafayette (US)
  • Indiana University Indianapolis (US)
  • Indiana University School of Medicine (US)
  • University of Arkansas for Medical Sciences (US)
  • The University of Texas at San Antonio Health Science Center (US)
Corresponding author
Robling, Alexander G.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2008-02
Volume
283
Issue
9
Pages
5866-5875
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1996161852
Cited by
1,350
References
48
Citations by year
2026: 51 · 2025: 47 · 2024: 54 · 2023: 53 · 2022: 73 · 2021: 87 · 2020: 97 · 2019: 99 · 2018: 79 · 2017: 82 · 2016: 79 · 2015: 104 · 2014: 77 · 2013: 105 · 2012: 59
FWCI
43.90
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-076007, R01DK076007)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR046530, R01AR046530, AR53237, P01AR046798, AR 46798)
Topics
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
  • 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
sclerostin, SOST gene, osteocytes, mechanical stimulation, mechanotransduction, Wnt signaling, hindlimb unloading, bone formation, cortical bone strain
MeSH terms
Animals, Female, Genetic Markers, Glycoproteins, Male, Osteocytes, Osteogenesis, Rats, Inbred Lew, Tibia, Ulna, Weight-Bearing, In Situ Hybridization, Weightlessness Simulation, Bone Morphogenetic Proteins, LDL-Receptor Related Proteins, Intercellular Signaling Peptides and Proteins, Mechanotransduction, Cellular, Adaptor Proteins, Signal Transducing, Wnt Proteins, Mice, Rats, Low Density Lipoprotein Receptor-Related Protein-5

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review