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Related Concept Videos

Bone Remodeling01:40

Bone Remodeling

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Osteoclasts in Bone Remodeling01:31

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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Related Experiment Video

Updated: May 17, 2025

A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling
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Developing a Bone-Mimicking Microenvironment: Surface Coating Method for Investigating Bone Remodeling in Vitro.

A Sieberath1,2,3, D Eglin4, C M Sprecher2

  • 1Newcastle University, Newcastle upon Tyne NE1 7RU, U.K.

ACS Biomaterials Science & Engineering
|April 10, 2025
PubMed
Summary

Researchers developed a novel coating for cell culture plates to mimic bone environments. This new assay allows simultaneous measurement of bone formation and resorption, aiding bone remodeling research.

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bone remodelingcoculturein vitroosteoblastosteoclast

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Orthopedics

Background:

  • Investigating bone formation and resorption in vitro requires biomimetic microenvironments.
  • Existing cell culture substrates lack the necessary complexity to accurately model bone remodeling.

Purpose of the Study:

  • To develop a coating technique for creating bone-like microenvironments on cell culture plastic (CCP) multiwell plates.
  • To establish an assay for simultaneously measuring cellular mineral formation and resorption in coculture models.

Main Methods:

  • A composite matrix of collagen type I and carbonated apatitic calcium phosphate was deposited onto CCP using simulated body fluid (SBF) supplemented with collagen type I.
  • Osteogenic differentiation, cell attachment, and proliferation were assessed using qPCR and fluorescence microscopy.
  • Osteoclast differentiation and resorption activity were evaluated on the coated substrates.

Main Results:

  • The coating successfully promoted osteogenic differentiation, attachment, and proliferation of human bone-marrow-derived mesenchymal stem cells.
  • Human bone-marrow-derived mononuclear cells differentiated into functional osteoclasts that resorbed the coated substrate.
  • An in vitro coculture system enabling real-time monitoring of mineral formation and resorption was established.

Conclusions:

  • The developed coating provides a physiologically relevant in vitro model for studying bone remodeling.
  • This assay facilitates screening of therapeutic compounds and identification of factors influencing bone remodeling.
  • The technique enhances translational research in bone health by offering a controlled experimental system.