Fig. 1 pDCs infiltrate the skin of SSc patients and spontaneously secrete IFN-α and CXCL4. pDCs infiltrate the skin of SSc patients and spontaneously secrete.

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Presentation transcript:

Fig. 1 pDCs infiltrate the skin of SSc patients and spontaneously secrete IFN-α and CXCL4. pDCs infiltrate the skin of SSc patients and spontaneously secrete IFN-α and CXCL4. Skin biopsies from (A) control subjects or (B) systemic sclerosis (SSc) patients were immunostained for CD123 (red signal; original magnification, ×200; inset, ×400), and (C) quantification of the number of CD123+ counted in five high-power microscopic fields (based on five bioptic samples of patients with SSc and of five controls) is shown. (D) Representative dot plots of plasmacytoid dendritic cells (pDCs), B cells, conventional DCs (cDCs), and monocytes from peripheral blood mononuclear cells (PBMCs) from healthy donors (HDs) or SSc patients analyzed by flow cytometry. (E) Percentages of pDCs, monocytes, B cells, and cDCs within PBMC of either HDs (open circle, n = 10 to 15) or SSc patients (n = 14 to 33) defined as early diffuse (closed circle), late diffuse (closed square), or limited (closed triangle) were quantified by flow cytometry. ns, not significant. (F) Purified pDCs from HDs (n = 8) or SSc patients (n = 20) were cultured for 24 hours without stimuli. CXCL4 and interferon-α (IFN-α) were quantified by enzyme-linked immunosorbent assay (ELISA). Results were normalized to 10,000 cells to account for the differences between donors in the number of cells put in culture. (G) The mean fluorescence intensity (MFI) of the costimulatory molecules CD83 and CD86 expressed on pDCs (n = 10 for HDs; n = 33 for SSc patients) was quantified by flow cytometry. Statistical significance was evaluated using a Mann-Whitney U test. *P < 0.05, **P < 0.01, ***P < 0.001. Marie Dominique Ah Kioon et al., Sci Transl Med 2018;10:eaam8458 Published by AAAS