Cited by 152Bone Metabolism and DiseasesBone health and osteoporosis researchAlkaline Phosphatase Research Studies

Coupling of Bone Resorption and Formation in Real Time: New Knowledge Gained From Human Haversian BMUs

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Lassen, Nicolai Ernlund, Andersen, Thomas Levin, Pløen, Gro Grunnet, Søe, Kent, Hauge, Ellen Margrethe, Harving, Søren, Eschen, Gete Ester Toft, Delaisse, Jean-Marie·2017·Journal of Bone and Mineral Research

Abstract

It is well known that bone remodeling starts with a resorption event and ends with bone formation. However, what happens in between and how resorption and formation are coupled remains mostly unknown. Remodeling is achieved by so-called basic multicellular units (BMUs), which are local teams of osteoclasts, osteoblasts, and reversal cells recently proven identical with osteoprogenitors. Their organization within a BMU cannot be appropriately analyzed in common histology. The originality of the present study is to capture the events ranging from initiation of resorption to onset of formation as a functional continuum. It was based on the position of specific cell markers in longitudinal sections of Haversian BMUs generating new canals through human long bones. It showed that initial resorption at the tip of the canal is followed by a period where newly recruited reversal/osteoprogenitor cells and osteoclasts alternate, thus revealing the existence of a mixed “reversal-resorption” phase. Three-dimensional reconstructions obtained from serial sections indicated that initial resorption is mainly involved in elongating the canal and the additional resorption events in widening it. Canal diameter measurements show that the latter contribute the most to overall resorption. Of note, the density of osteoprogenitors continuously grew along the “reversal/resorption” surface, reaching at least 39 cells/mm on initiation of bone formation. This value was independent of the length of the reversal/resorption surface. These observations strongly suggest that bone formation is initiated only above a threshold cell density, that the length of the reversal/resorption period depends on how fast osteoprogenitor recruitment reaches this threshold, and thus that the slower the rate of osteoprogenitor recruitment, the more bone is degraded. They lead to a model where the newly recognized reversal/resorption phase plays a central role in the mechanism linking osteoprogenitor recruitment and the resorption-formation switch. © 2017 American Society for Bone and Mineral Research.

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Crossref · 10.1002/jbmr.3091

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  • Secondary osteoclasts establish a functional link with reversal cells as focal bone remodeling progresses within a single BRC.

    “first, primary osteoclasts have been identified at the cutting cone and secondary osteoclasts have been shown to establish a functional link with reversal cells (Figs. 1 and 3) as focal bone remodeling progresses within a single BRC,256”
  • Primary osteoclasts have been identified at the cutting cone.

    “first, primary osteoclasts have been identified at the cutting cone and secondary osteoclasts have been shown to establish a functional link with reversal cells (Figs. 1 and 3) as focal bone remodeling progresses within a single BRC,256”
  • Lassen et al.'s findings indicate that a pure reversal period, as commonly depicted following a halt in resorption, does not take place.

    “Lassen et al.’s256 findings indicate that a pure reversal period, as commonly depicted following a halt in resorption,8 does not take place.”

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Research works printed but not linked: 4

  1. Baron R. Importance of the intermediate phases between resorption and formation in the measurement and understanding of the bone remodeling sequence. In: Meunier PJ, editor. Bone histo- morphometry: second international workshop Lyon. Toulouse: Armour Montagu; 1977. p. 179-83.
  2. Aubin JE. Osteoprogenitor cell frequency in rat bone marrow stromal populations: role for heterotypic cell-cell interactions in osteoblast differentiation. J Cell Biochem. 1999;72(3):396-410.
  3. Parfitt AM. The physiologic and clinical significance of bone histomorphometric data. In: Recker RR, editor. Bone histomorphometry: techniques and interpretation. Boca Raton: CRC Press; 1983. p. 143-223.
  4. Baron R, Vignery A, Lang R. Reversal phase and osteopenia: defective coupling of resorption to formation in the pathogene- sis of osteoporosis. In: Deluca HF, Frost HM, Jee WSS, Johnston CC, Parfitt AM, editors. Osteoporosis: recent advances in pathogenesis and treatment. Baltimore: University Park Press; 1980. p. 311-20.

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Authors
Lassen, N. E., Andersen, T. L., Pløen, G. G., Søe, K., Hauge, E. M., Harving, S., Eschen, G. E. T., & Delaisse, J.-M.
Affiliations
  • University of Southern Denmark (DK)
  • Aarhus University (DK)
  • Aalborg University Hospital (DK)
  • Department of Plastic SurgeryAarhus University HospitalAarhusDenmark
  • Clinical Cell BiologyInstitute of Regional Health ResearchUniversity of Southern DenmarkVejle/Lillebaelt HospitalVejleDenmark
Venue
Journal of Bone and Mineral Research
Published
2017-02-08
Volume
32
Issue
7
Pages
1395-1405
ISSN
  • 0884-0431 (ISSN-L)
  • 1523-4681
OpenAlex
W2586325787
Cited by
152
References
44
Citations by year
2026: 10 · 2025: 19 · 2024: 16 · 2023: 19 · 2022: 17 · 2021: 21 · 2020: 20 · 2019: 20 · 2018: 6 · 2017: 3
FWCI
5.48
Type
journal article
Language
en
Open access
Locations
  • Journal of Bone and Mineral Research (publishedVersion)
  • PubMed (publishedVersion)
  • VBN Forskningsportal (Aalborg Universitet) (publishedVersion, other-oa)
  • Scopus (Elsevier) (submittedVersion)
  • University of Southern Denmark Research Portal (University of Southern Denmark) (submittedVersion, other-oa)
Funders
Velux Foundation (VELUX34368)
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
bone remodeling, basic multicellular unit, bone resorption, bone formation, osteoprogenitor cells, osteoclasts, osteoblasts, Haversian canals, long bones, canal diameter, 3D reconstruction
MeSH terms
Bone Resorption, Humans, Osteoclasts, Bone Remodeling

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