A three-dimensional scaffold of type I collagen and hydroxyapatite enriched with polycaprolactone nanofibers (Coll/HA/PCL), autologous mesenchymal stem cells (MSCs) in osteogenic media, and thrombocyte-rich solution (TRS) was an optimal implant for bone regeneration in vivo in white rabbits. Nanofibers optimized the viscoelastic properties of the Coll/HA scaffold for bone regeneration. MSCs and TRS in the composite scaffold improved bone regeneration. Three types of Coll/HA/PCL scaffold were prepared: an MSC-enriched scaffold, a TRS-enriched scaffold, and a scaffold enriched with both MSCs and TRS. These scaffolds were implanted into femoral condyle defects 6 mm in diameter and 10-mm deep. Untreated defects were used as a control. Macroscopic and histological analyses of the regenerated tissue from all groups were performed 12 weeks after implantation. The highest volume and most uniform distribution of newly formed bone occurred in defects treated with scaffolds enriched with both MSCs and TRS compared with that in defects treated with scaffolds enriched by either component alone. The modulus of elasticity in compressive testing was significantly higher in the Coll/HA/PCL scaffold than those without nanofibers. The composite Coll scaffold functionalized with PCL nanofibers and enriched with MSCs and TRS appears to be a novel treatment for bone defects.

• MeSH
• hydroxyapatit chemie   MeSH
• kolagen chemie   MeSH
• králíci MeSH
• kultivované buňky MeSH
• mezenchymální kmenové buňky cytologie   metabolismus   MeSH
• nanovlákna chemie   MeSH
• polyestery chemie   MeSH
• regenerace kostí * MeSH
• tkáňové podpůrné struktury chemie   MeSH
• trombocyty chemie   MeSH
• zvířata MeSH
• Check Tag
• králíci MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

Pulsed laser deposition was proved as a suitable method for hydroxyapatite (HA) coating of coaxial poly-ɛ-caprolactone/polyvinylalcohol (PCL/PVA) nanofibers. The fibrous morphology of PCL/PVA nanofibers was preserved, if the nanofiber scaffold was coated with thin layers of HA (200 nm and 400 nm). Increasing thickness of HA, however, resulted in a gradual loss of fibrous character. In addition, biomechanical properties were improved after HA deposition on PCL/PVA nanofibers as the value of Young's moduli of elasticity significantly increased. Clearly, thin-layer hydroxyapatite deposition on a nanofiber surface stimulated mesenchymal stem cell viability and their differentiation into osteoblasts. The optimal depth of HA was 800 nm.

• MeSH
• buněčná diferenciace účinky léků   MeSH
• hydroxyapatit chemie   farmakologie   MeSH
• mezenchymální kmenové buňky cytologie   MeSH
• nanovlákna chemie   MeSH
• osteoblasty cytologie   MeSH
• polyestery chemie   MeSH
• polyvinylalkohol chemie   MeSH
• prasata MeSH
• proliferace buněk účinky léků   MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

Collagen/hydroxyapatite (HA) composite scaffolds are known to be suitable scaffolds for seeding with mesenchymal stem cells (MSCs) differentiated into osteoblasts and for the in vitro production of artificial bones. However, the optimal collagen/HA ratio remains unclear. Our study confirmed that a higher collagen content increased scaffold stiffness but that a greater stiffness was not sufficient for bone tissue formation, a complex process evidently also dependent on scaffold porosity. We found that the scaffold pore diameter was dependent on the concentration of collagen and HA and that it could play a key role in cell seeding. In conclusion, the optimal scaffold for new bone formation and cell proliferation was found to be a composite scaffold formed from 50 wt % HA in 0.5 wt % collagen I solution.

• MeSH
• biokompatibilní materiály chemie   metabolismus   MeSH
• biologické markery metabolismus   MeSH
• buněčná adheze MeSH
• buněčná diferenciace fyziologie   MeSH
• extracelulární matrix chemie   metabolismus   MeSH
• hydroxyapatity chemie   metabolismus   MeSH
• kolagen chemie   metabolismus   MeSH
• lidé MeSH
• mezenchymální kmenové buňky cytologie   fyziologie   MeSH
• modul pružnosti MeSH
• osteoblasty cytologie   fyziologie   MeSH
• poréznost MeSH
• proliferace buněk MeSH
• skot MeSH
• testování materiálů MeSH
• tkáňové podpůrné struktury chemie   MeSH
• zvířata MeSH
• Check Tag
• lidé MeSH
• skot MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• hodnotící studie MeSH
• práce podpořená grantem MeSH