Figure 4

Expression of phosphorylated p38 protein kinase and transcription factor ETS-1 in synovial microvessels and synovial endothelial cells. Immunohistochemistry of synovial microvessels (a,c) and synovial endothelial cells (b,d) of patients with RA shows the expression of phosphorylated p38 protein kinase (a,b) and ETS-1 transcription factor (c,d) in the endothelium of synovial microvessels.