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Related Concept Videos

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...
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: Jun 8, 2026

Obtaining Primary Osteocytes Through Murine Calvarial Fractionation of GFP-Expressing Osteocytes
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Identification of osteocyte-selective proteins.

Dayong Guo1, Andrew Keightley, Jill Guthrie

  • 1Department of Oral Biology, School of Dentistry, University of Missouri, Kansas City, MO 64108, USA.

Proteomics
|September 17, 2010
PubMed
Summary

Proteomics identified key proteins in osteocytes, revealing mechanisms for bone cell embedding, dendritic process formation, and survival in low-oxygen environments. This advances understanding of osteocyte-specific functions within bone matrix.

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Related Experiment Videos

Last Updated: Jun 8, 2026

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Area of Science:

  • Bone Biology
  • Cellular Proteomics
  • Osteocyte Function

Background:

  • Osteocytes, embedded within bone matrix, have poorly understood functions.
  • Osteoblasts are precursor cells to osteocytes, sharing some cellular machinery.

Purpose of the Study:

  • To identify proteins with higher expression in osteocytes compared to osteoblasts.
  • To elucidate osteocyte-specific functions using a proteomics approach.

Main Methods:

  • Comparative proteomics of osteocyte (MLO-Y4) and osteoblast (MC3T3) cell lines.
  • Validation of protein expression using gene expression, Western blotting, and in vivo immuno-staining.
  • Analysis of protein clusters related to glycolysis, protein folding, and actin cytoskeleton regulation.

Main Results:

  • Identified three protein clusters: glycolysis, protein folding, and actin cytoskeleton regulation.
  • Validated higher expression of ORP-150, CapG, and destrin in osteocytes.
  • Demonstrated selective in vivo expression of destrin, CapG, and ORP-150 in osteocytes embedded within bone matrix.

Conclusions:

  • Proteomics successfully identified osteocyte-specific proteins and functions.
  • Key proteins (ORP-150, CapG, destrin) are involved in osteocyte matrix embedding, dendritic process formation, and hypoxic protection.
  • This study provides insights into the molecular mechanisms underlying osteocyte adaptation and survival within the bone microenvironment.