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Related Concept Videos

Bone Remodeling01:40

Bone Remodeling

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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 in Bone Remodeling01:31

Osteoclasts in 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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Overview of Regeneration and Repair01:19

Overview of Regeneration and Repair

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Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
Regeneration
All animals have varying degrees of...
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Fractures: Bone Repair01:27

Fractures: Bone Repair

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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
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Role of Vitamins in Maintaining Bone Health01:25

Role of Vitamins in Maintaining Bone Health

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The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
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Whole Body Regeneration01:33

Whole Body Regeneration

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Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential;...
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Related Experiment Video

Updated: Aug 9, 2025

Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect
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Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect

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MSC-Exos: Important active factor of bone regeneration.

Sihang Ren1,2,3, Yuyang Lin1, Wenyue Liu1

  • 1Department of Plastic Surgery, The Second Hospital of Dalian Medical University, Dalian, China.

Frontiers in Bioengineering and Biotechnology
|February 23, 2023
PubMed
Summary

Mesenchymal stem cell exosomes (MSC-Exos) show promise for bone regeneration by delivering messages that support osteogenesis. This review summarizes their contents and binding methods for enhanced bone repair.

Keywords:
MSC-Exosbiomaterialsbone regenarationmesenchyaml stem cellsosteogenic cells

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Related Experiment Videos

Last Updated: Aug 9, 2025

Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect
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Visualizing Angiogenesis by Multiphoton Microscopy In Vivo in Genetically Modified 3D-PLGA/nHAp Scaffold for Calvarial Critical Bone Defect Repair
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Site-Directed Immobilization of Bone Morphogenetic Protein 2 to Solid Surfaces by Click Chemistry
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Site-Directed Immobilization of Bone Morphogenetic Protein 2 to Solid Surfaces by Click Chemistry

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Area of Science:

  • Regenerative Medicine
  • Biomaterials Science
  • Orthopedic Surgery

Background:

  • Bone defects present significant challenges in reconstructive surgery, leading to functional and aesthetic issues.
  • Mesenchymal stem cells (MSC) are a key focus in regenerative medicine for bone tissue repair.
  • MSC-derived exosomes (MSC-Exos) are increasingly recognized for their role in mediating MSCs' regenerative effects.

Purpose of the Study:

  • To review the composition and function of MSC-Exos in bone regeneration.
  • To summarize advancements in methods for integrating MSC-Exos with biomaterial scaffolds.
  • To highlight the potential of MSC-Exos in promoting osteogenesis.

Main Methods:

  • Literature review of studies on MSC-Exos and bone regeneration.
  • Analysis of exosomal content relevant to osteogenesis.
  • Examination of techniques for scaffold-exosome binding.

Main Results:

  • MSC-Exos contain various bioactive molecules that directly and indirectly promote osteogenesis.
  • MSC-Exos can influence osteogenic cells and the local microenvironment.
  • Effective strategies exist for binding MSC-Exos to bone regeneration scaffolds.

Conclusions:

  • MSC-Exos are a potent therapeutic tool for enhancing bone regeneration.
  • Further research into exosome content and scaffold integration will optimize clinical applications.
  • MSC-Exos demonstrate significant potential for promoting osteogenesis in bone defect repair.