Human iliac crest-derived mesenchymal stem cells (MSCs) from three donors aged 22–24 years (Lonza Biosciences) were subjected to Transwell chondrogenic differentiation as described by Murdoch et al. [34 (link)] and Barter et al. [35 (link)]. Cartilage discs were harvested after 3, 7 and 14 days and RNA extracted from the ground tissue using the Trizol/chloroform method (Invitrogen). cDNA was synthesised as for cartilage samples and subjected to qRT-PCR, as above.
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