Fig. 4From: Pellet coculture of osteoarthritic chondrocytes and infrapatellar fat pad-derived mesenchymal stem cells with chitosan/hyaluronic acid nanoparticles promotes chondrogenic differentiationImmunofluorescence assay of monoculture of IPFP mesenchymal stem cells (MSCs), monoculture of articular chondrocytes (ACs), and coculture of MSCs and ACs after 3Â weeks of chondrogenic induction. a Fluorescent images of two-dimensional monolayers. b Fluorescent images of three-dimensional pellet sections. Col collagenBack to article page