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Related Concept Videos

Bone Cells and Tissue01:30

Bone Cells and Tissue

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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...
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Bone Structure01:55

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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
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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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Compact Bone01:27

Compact Bone

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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...
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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
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The Hyoid Bone01:12

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The hyoid bone is a small U-shaped bone located in the upper neck at the level of the inferior mandible, with its tips pointing posteriorly. It does not directly articulate with any other bone in the body. The hyoid acts as the attachment site for the tongue, the larynx, and the pharynx. It is held in position by a series of small muscles attached from above or below. These muscles help to move the hyoid up/down or forward/back in coordination with movements of the tongue, larynx, and pharynx...
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Use of Human Perivascular Stem Cells for Bone Regeneration
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Use of Human Perivascular Stem Cells for Bone Regeneration

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Human bone cellsin vitro.

Pamela Gehron Robey1, John D Termine1

  • 1Mineralized Tissue Research Branch, National Institute of Dental Research, National Institutes of Health, Bldg 30 Rm 214, 20205, Bethesda, Maryland, USA.

Calcified Tissue International
|January 27, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel in vitro system using human bone cells to study osteoblast metabolism. This method successfully cultured bone cells, enabling detailed analysis of their metabolic processes and matrix formation.

Keywords:
Bone-specific proteinsCell cultureExtracellular matrixOsteoblasts

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Orthopedics

Background:

  • Osteoblasts are crucial for bone formation and remodeling.
  • Understanding osteoblast metabolism in vitro is vital for bone disease research.
  • Existing models may not fully recapitulate the complexity of bone cell function.

Purpose of the Study:

  • To establish a robust in vitro model for studying human osteoblast metabolism.
  • To characterize the functional and biosynthetic properties of cultured human bone cells.
  • To investigate the response of these cells to parathyroid hormone stimulation.

Main Methods:

  • Establishing human bone cell cultures from collagenase-treated bone fragments in low calcium medium.
  • Assessing alkaline phosphatase activity and intracellular cAMP response to human parathyroid hormone (1-34 fragment).
  • Inducing extracellular matrix mineralization using calcium, ascorbic acid, and β-glycerol phosphate.

Main Results:

  • Cultured cells demonstrated high alkaline phosphatase activity.
  • Cells showed a significant increase in intracellular cAMP upon parathyroid hormone stimulation.
  • The cells produced type I collagen, osteonectin, and bone proteoglycans, and formed a mineralized matrix.

Conclusions:

  • The established human bone cell culture system is a valuable tool for in vitro osteoblast research.
  • This model effectively mimics key aspects of osteoblast function and bone matrix production.
  • Further studies can utilize this system to investigate bone metabolism and therapeutic interventions.