Fig. 4

ICC representative images for all the three profibrotic markers α-SMA (top row), Col-1 (middle row), and SM22 (bottom row) in control fibroblasts stimulated with IgGs (a) and with sera (b). For IgG stimulation (a), data are represented for ratio 1:100 only due to the better window shown in qPCR and ICC quantification. For serum stimulation (b), data are represented with respect to SSc sera negative for anti-Cenp-B and anti-Topo-I antibodies and for other ENAs. Negative control is represented in the middle and obtained by replacing the primary antibody with PBS