Related Experiment Video
Updated: Mar 1, 2026
04:24
A Mouse Distraction Osteogenesis Model
Published on: November 14, 2018
6.8K
[Regulation of distractional osteogenesis: biochemical aspects]
Vestnik Rossiiskoi Akademii Meditsinskikh Nauk
|March 21, 2000
Summary
Bone regeneration involves specific cell types and environmental factors. Distraction-regenerate bone (DRB) cells, influenced by hypoxia and local factors, contribute to new cancellous bone (NCB) formation during osteosynthesis.
Area of Science:
- Orthopedics and Regenerative Medicine
- Biomaterials Science
- Cell Biology
Background:
- Bone defects pose significant clinical challenges.
- Distraction-osteosynthesis is a method for bone reconstruction.
- Understanding the cellular and molecular mechanisms of bone regeneration is crucial.
Purpose of the Study:
- To analyze the composition of bone tissue fractions during distraction-compression osteosynthesis.
- To compare the cellular origins of different bone tissue types, including bone tissue of new-born puppies (BP), distractional regenerate bone (DRB), and new cancellous bone (NCB).
- To investigate the factors influencing the proliferation of immature distractional regenerate bone.
Main Methods:
- Fractionation of bone samples (intact compact bone, BP, DRB, NCB) by maturity.
- Comparative analysis of the mineral and organic matrix composition.
- Assessment of cellular phenotypes and proliferation potential.
- Evaluation of environmental factors like hypoxia and local growth factors.
Main Results:
- Low-mineralized fractions of bone tissue of new-born puppies (BP) and new cancellous bone (NCB) were found to be compositionally identical.
- These fractions are suggested to originate from distractional regenerate bone (DRB) cells.
- DRB cells involved in regeneration exhibit phenotypes distinct from classical osteogenic cells.
- The high proliferative capacity of immature DRB fractions is linked to relative hypoxia and dynamic local factor concentrations.
Conclusions:
- Distractional regenerate bone (DRB) cells play a key role in forming new cancellous bone (NCB) during distraction-compression osteosynthesis.
- The unique cellular environment, including hypoxia, within the distraction zone influences the regenerative process.
- Phenotypic plasticity of DRB cells is essential for successful bone regeneration.
More Related Videos
09:26An Efficient and Reproducible Protocol for Distraction Osteogenesis in a Rat Model Leading to a Functional Regenerated Femur
Published on: October 23, 2017
8.0K
07:35Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
Published on: April 11, 2012
18.9K
Related Concept Videos
01:40Bone Remodeling
40.7K
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.
40.7K
01:08Allosteric Regulation
63.8K
Allosteric regulation of enzymes occurs when the binding of an effector molecule to a site that is different from the active site causes a change in the enzymatic activity. This alternate site is called an allosteric site, and an enzyme can contain more than one of these sites. Allosteric regulation can either be positive or negative, resulting in an increase or decrease in enzyme activity. Most enzymes that display allosteric regulation are metabolic enzymes involved in the degradation or...
63.8K
01:17Hormones and Bone Tissue
4.0K
The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
4.0K
01:29Bone Disorders
5.7K
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.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
5.7K
01:19Regulation of Metabolism
11.9K
Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
11.9K