RAGE gene expression in ventilated patients. Relative mRNA expression levels of the receptor for advanced glycation end products (RAGE) in human bronchoalveolar lavage fluid cells (A) (n = 31 pairs) and lung brush samples (B) (n = 15 pairs). Samples were obtained from patients at baseline and after 5 h of mechanical ventilation (MV). Gene expression was normalized to the house-keeping gene hypoxanthine-guanine phosphoribosyl transferase (HPRT). Data represent mean (SEM), *p < 0.05.