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Related Experiment Videos

Autogenous cultured bone graft--bone reconstruction using tissue engineering approach.

T Yoshikawa1, H Ohgushi

  • 1First Department of Pathology, Nara Medical University, Kashihara City, Japan. tyoshi@naramed-u.ac.jp

Annales Chirurgiae Et Gynaecologiae
|October 26, 1999
PubMed
Summary

Researchers created a bone graft using patient cells and hydroxyapatite ceramics. This cultured bone construct effectively regenerated bone tissue after implantation, offering a novel approach for bone reconstruction surgery.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Orthopedic Surgery

Background:

  • Bone defects pose significant challenges in reconstructive surgery.
  • Current bone grafting methods have limitations, including donor site morbidity and graft availability.
  • Developing functional, autologous bone substitutes is a key goal in regenerative medicine.

Purpose of the Study:

  • To construct and evaluate an in vitro cultured bone/hydroxyapatite (HA) composite for bone regeneration.
  • To assess the osteogenic potential and biological activity of the fabricated construct both in vitro and in vivo.
  • To explore the feasibility of using aged human marrow cells for bone tissue engineering.

Main Methods:

  • Culturing rat bone marrow cells on porous HA ceramics in the presence of dexamethasone and beta-glycerophosphate.

Related Experiment Videos

  • Characterizing the in vitro construct using Scanning Electron Microscopy (SEM), alkaline phosphatase (ALP) activity assays, and osteocalcin measurements.
  • Evaluating the in vivo osteogenic capacity and biological activity of the implanted construct through histological analysis and Northern blot analysis.

    • Main Results:

    • The in vitro construct exhibited mineralized collagen fibers, high ALP activity, and osteocalcin production, indicating osteoblast differentiation.
    • In vivo implantation resulted in significant bone matrix increase and new bone formation within one week.
    • The cultured bone/HA construct demonstrated sustained osteogenic activity for up to one year and expressed ALP and osteocalcin mRNA comparable to native bone.
    • Successful fabrication using aged human marrow cells led to thick lamellar bone formation post-implantation.

    Conclusions:

    • The in vitro fabricated bone/HA construct possesses significant in vivo bone-forming capability.
    • This approach offers a promising alternative for bone reconstruction surgery using patient-derived, autogenous cultured bone.
    • Autologous bone tissue can be fabricated from patient marrow cells obtained via minimally invasive needle aspiration.