Freshly outgrown CPC were characterized morphologically and by immunocytochemical stainings. A: Cartilage slice after 11 days of cultivation with emigrated cells of fibroblastoid appearence. B-F: Immunocytochemical staining of chondrogenic progenitor cells (CPC) specific for CD73 (B), CD90 (C), CD166 (D) and CD54 (E); F: negative control. The bar indicates 100 μm.
Joos et al. Arthritis Research & Therapy 2013 15:R119 doi:10.1186/ar4299