Fig. 6.
Expression profile of COL1A1, COL2A1, COL10A1, ACAN, and SOX9 after 3 weeks of chondrogenic induction in monolayer (a) and pellet (b) culture. Gene expression of each group was normalized to the AC group. Data are presented as mean ± SD. *P < 0.05. AC articular chondrocyte, MSC mesenchymal stem cell, NP nanoparticle