Minimal vascular pulmonary remodeling after MCT.

A. Representative images 400x indicating only mild thickening of pulmonary arterioles from WT and COX-2 KD mice after MCT compared to saline. Lower panels are representative of WT and COX-2 KD MCT-treated mice that required euthanasia. Sections were stained with H&E. Lungs from 38 mice were evaluated microscopically with 2 lung sections/mouse, as follows: WT/saline, n = 6; COX-2 KD saline, n = 6; WT/MCT, n = 14; COX-2 KD/MCT, n = 12. B. Representative photomicrographs at 200x (a, c) of lung sections from a COX-2 KD MCT-treated mouse showing pulmonary mild perivascular edema with neutrophil infiltration in small arterioles. Boxed areas from a and c are shown at 400x in b and d.