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Figure 4 | Arthritis Research & Therapy

Figure 4

From: Transition of healthy to diseased synovial tissue in rheumatoid arthritis is associated with gain of mesenchymal/fibrotic characteristics

Figure 4

α-Smooth muscle actin (α-sma) staining in healthy and arthritic synovial tissue. (a) No α-sma staining was found in the lining layer of healthy synovial tissue. (c) In synovial biopsies from rheumatoid arthritis patients, cells positive for α-sma expression were found in the lining layer. Relative isotype controls are shown in (b,d). Arrows indicate α-sma positive cells from the lining layer.

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