NF-κB p65 staining in pulmonary vascular cells in lung parenchyma a patient with idiopathic pulmonary arterial hypertension.

<p>Light microscopy demonstrating immunohistochemical p65+ (pink)-staining in vascular cells in diseased pulmonary arteries in lung sections from pulmonary arterial hypertension (PAH) subjects. Pulmonary arterial endothelial cells show intense staining for p65+ as indicated with a black arrow (A and B). Pulmonary arterial smooth muscle cells (PASMC) stain positive for nuclear p65+ (black arrow) and p65-stain negative (unfilled arrow) (C). Results representative of those from 12 PAH subjects. Magnification x200.