Age-related differences in GSH-shuttle enzymes in NO2- or O3-exposed rat lungs.

The effect of age on changes in glutathione (GSH)-shuttle enzyme activities in rat lungs following a 72-hr exposure to NO2 (14 ppm) or O3 (approximately 0.9 ppm) was investigated. Exposed animals survived and were in the adaptive recovery phase at sacrifice.

Cytologic responses of postnatal rat lungs to O3 or NO2 exposure.

At the level of exposure employed (approximately 14.0 ppm NO2 or 0.85 ppm O3) epithelial cells at the juncture of the terminal airways and proximal alveoli have previously been shown to be seriously injured or destroyed in maturing (35 days of age or older) and adult lungs.