Figure 1.

Gene expression patterns in rheumatoid arthritis (RA) and osteoarthritis (OA) fibroblast-like synoviocytes (FLSs). Total RNA of control RA (a) and OA FLSs (c) and of RA (b) and OA FLSs (d) stimulated for 4 hours with protein I/II were first reverse-transcribed and ³²P-labeled and then hybridized to Atlas human cancer cDNA expression arrays. Arrows indicate double spots representing IL-6.