Cited by 81Bone Metabolism and DiseasesBone health and osteoporosis researchAlkaline Phosphatase Research Studies

Histomorphometric analysis of the effects of osteocyte density on osteonal morphology and remodeling

Metz, Lionel N, Martin, R.Bruce, Turner, A.Simon·2003·Bone

Abstract

Osteocytes, the most abundant cells in the cortical bone matrix, are thought to have mechanosensory and chemosensory regulatory roles. Marotti theorized that osteocytes signal to osteoblasts to recruit them into the osteocyte lineage. Martin extended this theory, assuming that osteocytes display a general inhibitory effect on osteoblast function. The current study provides a quantitative analysis of the relationships between osteonal osteocyte density (Ot.N/BV), wall width (W.Wi), individual osteon porosity (IOP), and formation period (FP) in ulnar cortices from sheep labeled with tetracycline and calcein double labels. We postulated that osteocytes inhibit refilling so that the osteon wall width is thin enough, and the haversian canal is large enough, to allow adequate delivery of nutrients to the osteocytes throughout the forming and completed osteon. Therefore we tested the hypotheses that Ot.N/BV correlates negatively to FP and W.Wi, and positively to IOP, and that FP correlates positively with W.Wi. We found that Ot.N/BV correlated positively with IOP (P < 0.0001) and W.Wi correlated positively with FP (P < 0.0001). Significant negative correlations were observed between Ot.N/BV and both W.Wi (P < 0.0001) and FP (P = 0.006). These data support the general hypothesis that osteocytes contribute to the regulation of osteon morphology via the control of refilling rate and formation period, and the specific hypotheses that, for a given cement line diameter, high osteocyte density (1) reduces the rate of refilling and decreases the formation period and (2) decreases wall width and increases individual osteon porosity.

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Crossref · 10.1016/s8756-3282(03)00245-x

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  • Osteocytes represent more than 90% of bone cells in the adult skeleton, with an average cell density highly dependent on the species, bone anatomical site, and subject analyzed.

    “Osteocytes represent more than 90% of bone cells in the adult skeleton14 with a average cell density highly dependent on the specie, bone anatomical site, and subiect analyzed.15”

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Authors
Metz, L. N., Martin, R. B., & Turner, A. S.
Affiliations
  • University of California Davis Medical Center (US)
  • Colorado State University (US)
Corresponding author
Martin, R.Bruce
Venue
Bone
Publisher
Elsevier BV
Published
2003-11
Volume
33
Issue
5
Pages
753-759
ISSN
  • 1873-2763 (ISSN-L)
  • 8756-3282
OpenAlex
W2119247732
Cited by
81
References
22
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 4 · 2016: 4 · 2015: 2 · 2014: 6 · 2013: 11 · 2012: 7
FWCI
1.38
Type
journal article
Language
en
Open access
closed
Locations
  • Bone (publishedVersion)
  • PubMed (publishedVersion)
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
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Alkaline Phosphatase Research Studies
Keywords
osteocytes, osteocyte density, formation period, cortical bone, sheep
MeSH terms
Animals, Cell Count, Female, Osteocytes, Sheep, Ulna, Bone Remodeling

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