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Related Concept Videos

Compact Bone01:27

Compact Bone

Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
Bone Remodeling01:40

Bone Remodeling

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.
Components of Stress01:23

Components of Stress

Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
Interestingly, the hidden cube faces also experience these stresses, equal and opposite to those on the...
Bone Cells and Tissue01:30

Bone Cells and Tissue

Bones contain a relatively small number of cells entrenched in a matrix of organic and inorganic components. Although bone cells compose only a small amount of the bone volume, they are crucial to its function. Four types of cells are found within the bone tissue— osteoblasts, osteocytes, osteogenic cells, and osteoclasts.
Osteoblasts and Osteocytes
The osteoblast is the bone cell responsible for forming new bone tissue. It is found in the growing portions of bone, including the periosteum and...
The Bone Matrix01:18

The Bone Matrix

Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in acid or...
Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

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 bone...

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Related Experiment Video

Updated: Jul 2, 2026

A Fluorescent Intravital Imaging Approach to Study Load-Induced Calcium Signaling Dynamics in Mouse Osteocytes
05:03

A Fluorescent Intravital Imaging Approach to Study Load-Induced Calcium Signaling Dynamics in Mouse Osteocytes

Published on: February 24, 2023

[Osteocytes and mechanical stress].

Hiroshi Kamioka1, Takashi Yamashiro

  • 1Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Department of Orthodontics.

Clinical Calcium
|September 2, 2008
PubMed
Summary
This summary is machine-generated.

Osteocytes regulate bone metabolism through mechanical stimuli. New hypotheses explore how fluid flow and cell structure activate osteocytes, requiring 3D imaging for validation.

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Analysis and Imaging of Osteocytes
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Analysis and Imaging of Osteocytes

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A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling

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Related Experiment Videos

Last Updated: Jul 2, 2026

A Fluorescent Intravital Imaging Approach to Study Load-Induced Calcium Signaling Dynamics in Mouse Osteocytes
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A Fluorescent Intravital Imaging Approach to Study Load-Induced Calcium Signaling Dynamics in Mouse Osteocytes

Published on: February 24, 2023

Analysis and Imaging of Osteocytes
10:19

Analysis and Imaging of Osteocytes

Published on: November 29, 2024

A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling
08:28

A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling

Published on: May 21, 2020

Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Skeletal Biology

Context:

  • Osteocytes are crucial for bone metabolism and responding to mechanical forces.
  • The precise mechanisms by which osteocytes detect mechanical stimuli remain debated.
  • In vitro studies often fail to replicate in vivo mechanical effects on bone cells.

Purpose:

  • To explore the mechanisms of osteocyte mechanotransduction.
  • To introduce and discuss recent hypotheses on osteocyte mechanical stimulation.
  • To highlight the importance of 3D osteocyte morphology and pericellular matrix interactions.

Summary:

  • Osteocytes play a key role in bone metabolism and mechanical load regulation.
  • Current theories emphasize fluid flow-induced shear stress as a primary mechanical stimulus for osteocytes.
  • Novel hypotheses include strain amplification, integrin-mediated signaling, and osteocyte lacuna strain.

Impact:

  • Understanding osteocyte mechanobiology is vital for developing treatments for bone diseases.
  • This research could lead to new strategies for bone tissue engineering and fracture healing.
  • Accurate 3D visualization of osteocytes and their environment is essential for validating these hypotheses.