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Osteogenesis of cryopreserved osteogenic matrix cell sheets
Takamasa Shimizu1, Manabu Akahane, Tomoyuki Ueha
1Department of Orthopedic Surgery, Nara Medical University, Kashihara, Nara 634-8522, Japan. tk-shimi@naramed-u.ac.jp
Cryobiology
|April 9, 2013
Summary
Cryopreservation of osteogenic matrix cell sheets (OMCS) effectively preserves their bone-forming ability. This technique allows for the storage and use of engineered bone tissue, simplifying clinical applications.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Large-scale clinical application of tissue-engineered bone (TEB) requires effective cryopreservation methods.
- Osteogenic matrix cell sheets (OMCS) derived from bone-marrow-derived mesenchymal stem cells (BMSCs) are a promising precursor for TEB.
- Maintaining the osteogenic potential of OMCS post-cryopreservation is crucial.
Purpose of the Study:
- To evaluate the in vivo osteogenic potential of cryopreserved OMCS.
- To determine if cryopreservation affects the bone-forming capability of OMCS.
- To assess the feasibility of using cryopreserved OMCS for TEB production.
Main Methods:
- OMCS were cryopreserved for 4 and 12 weeks at -80°C using Cell Banker 1®.
- Cryopreserved OMCS were thawed and wrapped around Hydroxyapatite (HA) scaffolds.
- Constructs were implanted subcutaneously in rats for 4 weeks to assess in vivo bone formation.
Main Results:
- Histological analysis revealed extensive bone formation within HA pores in cryopreserved groups.
- High alkaline phosphatase (ALP) activity and osteocalcin (OC) content were detected in cryopreserved OMCS constructs.
- Cryopreserved/thawed OMCS successfully produced mineralized matrix, indicating retained osteogenic potential.
Conclusions:
- Cryopreservation of OMCS does not significantly impair their osteogenic ability.
- This cryopreservation technique is suitable for hard tissue reconstruction.
- It simplifies cell preparation for clinical use in tissue engineering.
