Fig. 3
From: Myofibroblasts and lung fibrosis induced by carbon nanotube exposure
α-SMA expression induced by MWCNTs in mouse lungs. Pulmonary exposure to MWCNTs (XNRI MWNT-7, 40 μg) for 7 days strongly induces α-SMA expression. α-SMA expression in well-formed fibrotic foci is shown by immunohistochemistry (upper panel) and in less well-formed, early stage fibrotic foci by immunofluorescence (lower panel), respectively (scale bar: 20 µm; for immunofluorescence, red: α-SMA staining, blue: nuclear DAPI staining)