Effects of hyperoxia on LAT1 expression in alveolar epithelial cells
in vitro. Effects on LAT1 accumulation detected by immunoblot in whole cell lysates (A–F, 90 μg/lane) and plasma membrane fractions (G, H, 30 μg/lane) in R3/1, L2, and A549 cells. Representative immunoblots and densitometry for R3/1 (A, B) L2 (C, D), and A549 (E, F) cells after exposure to air or hyperoxia (60% or 90%). Densitometry analysis of LAT1 expression (80 kDa bands, gray bars; 40 kDa bands, black bars) normalized to β actin or pan-cadherin, mean of 4–5±SEM for whole cell lysates. Data for plasma membrane fractions are pooled from 4 plates. *p<0.05 versus corresponding air control.