FIG. 4.

(A) Representative images of chondrogenic pellets cultured from chondrocytes following culture in hPL either in the Quantum^® bioreactor or on TCP and in FBS on TCP. Chondrogenic pellets were stained using toluidine blue to assess glycosaminoglycans. Scale bars represent 100 μm. (B) For two donors, chondrogenic pellets could not be formed or maintained in hPL until 28 days, as demonstrated in the table; Y = yes and N = no. For another two donors, there were IC harvested following FBS expansion to set sufficient numbers of chondrogenic pellets for analysis. IC, insufficient cells.