Fig. 5.
Irf5 deletion abrogates vascular destabilization and EndoMT induced by BLM. (A, Left) Evaluation for the extravasation of Evans blue dye injected into the caudal vein of BLM-treated mice. (Right) Quantification of Evans blue dye extravasation by formamide extraction (n = 6). (B) Immunohistochemistry for α-SMA in the skin of PBS- or BLM-treated mice. (Scale bars, 100 µm.) (C) Immunofluorescence staining for FSP1 (green), VE-cadherin (red), and DAPI (blue) in skin samples from each group. Arrows represent FSP1/VE-cadherin double-positive cells. (Scale bar, 100 µm.) (n = 4). (D, Upper) ChIP assay with anti-IRF5 antibody in human dermal microvascular endothelial cells with or without HMGB1 stimulation (10 μg/mL for 24 h) and in Tlr4+/+ and Tlr4−/− murine dermal microvascular endothelial cells. (Lower) Quantification by qRT-PCR (n = 5). *P < 0.05 by two-tailed unpaired t-test.