Immunology / Membrane Proteins / Transcription Factors / Gene expression / Osteoarthritis / Humans / Peroxisome proliferator-activated receptor / Arthritis / Clinical Sciences / Public health systems and services research / Isoenzymes / Human Fibroblasts / DNA binding proteins / Ligands / Humans / Peroxisome proliferator-activated receptor / Arthritis / Clinical Sciences / Public health systems and services research / Isoenzymes / Human Fibroblasts / DNA binding proteins / Ligands