Fig. 3
From: Abatacept reduces synovial regulatory T-cell expression in patients with psoriatic arthritis
Representative images of immunofluorescent staining in cryostat synovial sections in a patient. a Nuclear staining of forkhead box protein transcription factor 3 (FOXP3) (green), b CD4+ T lymphocytes (red), c double-stained CD4+FOXP3+ T lymphocytes (green nuclear staining surrounded by red cytoplasmic staining), insert shows magnification × 40, white arrow points to a double-stained CD4+FOXP3+ T cell. d Reduction in the number of double-stained CD4+FOXP3+ T cells from baseline to 6 months. Magnification of photomicrographs × 20