J Korean Orthop Assoc.  2003 Jun;38(3):259-266.

Osteogenic Differentiation of Human Mesenchymal Stem Cells: Effects of the compositions of biodegradable polymers and the initial cell-seeding density

• Kim HW
• Joo SY
• Kang HJ
• Hahn SB
• Han CD

Abstract

PURPOSE
To investigate the effects of initial cell-seeding density and the compositions of biodegradable polymer scaffolds on the osteogenic differentiation of human mesenchymal stem cells. MATERIALS AND METHODS: Human mesenchymal stem cells (hBMSCs) were cultured three-dimensionally onto biodegradable polymers with three different compositions (65/35 PLGA, 85/15 PLGA, PLLA), and osteogenic differentiation was studied by; histology, immuno-histochemistry, and transmision/scanning electron microscopy.
RESULTS
In terms of the amount of extracellular matrix (ECM) produced, the 65/35 PLGA (23% of the whole volume) was found to produce more ECM than 85/15 PLGA (21%) and PLLA (13%). Osteoblastic differentiation of hBMSCs was induced in all scaffolds examined and the deposition of ECM with calcifications started after 2 weeks of culture. The amount of calcium deposited on the 65/35 PLGA dramatically increased at 4 weeks. On comparing low cell-seeding density with the high cell-seeding density on 65/35 PLGA, calcium deposits reached similar levels at 6 weeks. CONCLUSION: Three-dimensional culture of hBMSCs on biodegrable polymer scaffolds induced bone formation, which was dependent on the compositions of the scaffolds and the initial cell-seeding density.

Keyword

Human mesenchymal stem cells; Osteogenic differentation; Biodegradable polymers

MeSH Terms

Calcium
Extracellular Matrix
Humans*
Mesenchymal Stromal Cells*
Microscopy, Electron
Osteoblasts
Osteogenesis
Polymers*
Calcium
Polymers