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Bone Remodeling01:40

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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 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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Osteoclast Derivation from Mouse Bone Marrow
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The osteocyte: key player in regulating bone turnover.

Steven R Goldring1

  • 1Research Division , Hospital for Special Surgery, Weill Cornell Medical College , New York, New York , USA.

RMD Open
|November 12, 2015
PubMed
Summary
This summary is machine-generated.

Osteocytes, the most common bone cells, regulate bone remodeling by sensing mechanical and hormonal signals. They coordinate osteoclast and osteoblast activity for bone adaptation and repair.

Keywords:
Bone Mineral DensityCytokinesOsteoarthritisOsteoporosis

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Area of Science:

  • Bone Biology
  • Skeletal Physiology
  • Cellular Mechanotransduction

Background:

  • Osteocytes are the most abundant cells within the mineralized bone matrix.
  • They form an interconnected network, crucial for sensing mechanical and systemic stimuli.
  • This network regulates bone remodeling and adaptation.

Purpose of the Study:

  • To elucidate the role of osteocytes in regulating bone remodeling.
  • To understand how osteocytes coordinate osteoblast and osteoclast activity.
  • To explore osteocyte signaling in response to biomechanical and hormonal factors.

Main Methods:

  • The study focuses on the functional role of osteocytes within the bone multicellular unit.
  • It examines osteocyte-mediated signaling through cell-cell interactions and soluble mediators.
  • The research investigates the adaptive mechanisms of the skeleton.

Main Results:

  • Osteocytes are strategically positioned to sense and respond to biomechanical and systemic cues.
  • They orchestrate bone remodeling by influencing osteoclast and osteoblast activity.
  • Osteocyte signaling is vital for skeletal adaptation and repair of damaged bone.

Conclusions:

  • Osteocytes play a central role in regulating bone homeostasis and adaptation.
  • Their communication with osteoclasts and osteoblasts is essential for bone remodeling.
  • Understanding osteocyte function is key to addressing bone diseases and injuries.