has subject area Cartilage, Articular Cells, Cultured Chondrocytes Drug Synergism Fibronectins Humans In Vitro Techniques Integrin alpha5beta1 Interleukin-1 Interleukin-6 Interleukin-7 Interleukins Knee Joint Matrix Metalloproteinase 13 Peptide Fragments Up-Regulation