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mRNA and protein expression levels of NGAL in groups treated with different mechanical ventilation protocols. NGAL (A) mRNA (B) protein expression levels, expressed as the mean ± standard deviation. *P<0.05, **P<0.01 vs. control. (C) Representative western blot images of NGAL protein expression levels. NGAL, neutrophil gelatinase-associated lipocalin; BAL, bronchoalveolar lavage fluid; LV2, low volume exposure for 2; HV2, high volume exposure for 2 h; PIP, peak inflation pressure.
