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. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: Pediatr Res. 2010 Jun;67(6):591–597. doi: 10.1203/PDR.0b013e3181dbac3d

Figure 2. Photomicrographs of lungs from neonatal mice exposed to room air or hyperoxia while being treated with vehicle (Veh), vitamin A (VA) alone, retinoic acid (RA) alone, or vitamin A + retinoic acid (VARA).

Figure 2

(H&E stain; 400x; calibration bar = 50 μm; Br = Bronchus). Exposure to hyperoxia led to hemorrhage (erythrocytes within alveoli and in alveolar septae) and airway epithelial injury (denuded epithelial cells within Br) that were attenuated with VA, RA, and to a greater extent with VARA.