Figure 4.

Lung endothelial cell apoptosis in neonatal WT mice exposed to hyperoxia. One-day-old WT mice were exposed to either 21% O₂ (normoxia) or 70% O₂ (hyperoxia) for one or two weeks (n = 6/exposure/time-point), after which the lung sections were processed for colocalization studies. (A–D) Representative merged images of lung sections stained with TUNEL (green), anti-vWF (red) antibody, and DAPI (blue). The frames in the original magnification figures represent the zoomed regions. Scale bar = 50 µM.