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Related Experiment Videos

Injectable bone.

F Chen1, T Mao, K Tao

  • 1Department of Oral and Maxillofacial Surgery, Dental School, Qin Du Hospital, Fourth Military Medical University, Kang Fu Road #7, Xi'an 710032, PR China. cflfx@163.net

The British Journal of Oral & Maxillofacial Surgery
|August 30, 2003
PubMed
Summary
This summary is machine-generated.

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Injecting bone marrow mesenchymal cells within a temperature-dependent polyethylene oxide hydrogel promoted new bone generation in mice. This cell-hydrogel complex shows potential for clinical applications in bone regeneration.

Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Bone marrow mesenchymal cells are crucial for bone regeneration.
  • Developing effective delivery vehicles for these cells is essential for therapeutic applications.

Purpose of the Study:

  • To evaluate the efficacy of a temperature-dependent polymerising polyethylene oxide hydrogel as a vehicle for delivering bone marrow mesenchymal cells.
  • To investigate the potential of this cell-hydrogel complex to induce new bone formation in vivo.

Main Methods:

  • Bone marrow mesenchymal cells were cultured in vitro and suspended in polyethylene oxide solution at a density of 5 x 10^7 cells/ml.
  • The cell-hydrogel complex was formed by adjusting the temperature above 6°C.
  • 0.5 ml aliquots were injected subcutaneously into nude mice (n=6), with controls (n=4) receiving hydrogel alone.

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  • New bone formation was assessed via gross inspection, radiography, and histological examination after two months.

    • Main Results:

    • Subcutaneous hard nodes formed in all cell-hydrogel injected mice, indicating successful implantation and tissue response.
    • Radiographs revealed a distinct shadow in cell-seeded mice, suggesting ossification.
    • Histological analysis confirmed the presence of trabecular bone and neocartilage within the nodes.
    • Control hydrogel was completely absorbed without significant tissue formation.

    Conclusions:

    • The polyethylene oxide hydrogel effectively delivered bone marrow mesenchymal cells and supported the generation of new bone and cartilage.
    • This cell-hydrogel composite demonstrates significant potential as a therapeutic strategy for bone regeneration applications.
    • The temperature-dependent nature of the hydrogel facilitates minimally invasive delivery via injection.