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Related Concept Videos

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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Bone Cells and Tissue01:30

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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.
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Hormones and Bone Tissue01:17

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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.
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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...
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Bone as Supporting Connective Tissue01:23

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Bone tissue forms the internal skeleton of vertebrate animals, providing structure to the body.
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Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
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Author Spotlight: Insights into the Use of Apple-Derived Cellulose Scaffolds for Bone Tissue Engineering
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Biofunctionalized Scaffold in Bone Tissue Repair.

Francesca Diomede1, Marco D'Aurora2, Agnese Gugliandolo3

  • 1Department of Medical, Oral and Biotechnological Sciences, University "G. d'Annunzio", Chieti-Pescara, via dei Vestini, 31, 66100 Chieti, Italy. francesca.diomede@unich.it.

International Journal of Molecular Sciences
|March 30, 2018
PubMed
Summary
This summary is machine-generated.

Human periodontal ligament stem cells (hPDLSCs) and their conditioned medium (CM) significantly enhance bone regeneration. This approach, using scaffolds, shows promise for repairing critical-sized bone defects, particularly in calvarial injuries.

Keywords:
bone regenerationconditioned mediummesenchymal stem cellsscaffold

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Stem Cell Biology

Background:

  • Bone tissue engineering utilizes bone grafting for defect repair.
  • Mesenchymal stem cells (MSCs) can improve bone regeneration rates and quality.
  • The stem cell secretome, including growth factors, influences cellular behavior.

Purpose of the Study:

  • To investigate the osteogenic potential of human periodontal ligament stem cells (hPDLSCs) and their conditioned medium (CM) for bone regeneration.
  • To evaluate the efficacy of a commercial scaffold (EVO) combined with hPDLSCs and/or CM in a rat calvarial defect model.

Main Methods:

  • Implantation of EVO scaffolds alone, or with hPDLSCs and/or CM, into rat calvarial defects.
  • Assessment of bone regeneration using micro-computed tomography (CT) and osteopontin level analysis.
  • In vitro analysis of gene expression related to bone regeneration via RT-PCR.

Main Results:

  • EVO membranes enriched with hPDLSCs and CM demonstrated superior osteogenic ability in repairing calvarial defects.
  • Micro-CT imaging and increased osteopontin levels confirmed enhanced bone regeneration.
  • In vitro RT-PCR showed upregulation of COL5A1, COL16A1, and TGFβ1, and downregulation of 26 other bone regeneration genes.

Conclusions:

  • Conditioned medium from hPDLSCs combined with scaffolds shows significant potential for bone defect restoration.
  • This strategy is particularly promising for calvarial repair following trauma.
  • Further research into CM applications could advance bone tissue engineering strategies.