Fig. 4

Monolayered and triple-layered chondrocyte sheets constructed from the cells on G5 and PS surfaces. Scale bars show 1 cm (a). Quantitative RT-PCR analysis of collagen type II, aggrecan and collagen type I expressions in human chondrocytes sheets constructed from the human chondrocytes on the G5 (open bar) and PS (close bar) surfaces (b). Data represent average values with the standard deviation determined from triplicate independent experiments and considered significant at *p < 0.05 and **p < 0.01