PTEN and acute respiratory distress syndrome: The expression levels of PTEN, Bax/Bcl-2 and Cleaved-Caspase3 were significantly downregulated in the TAG + ARDS group compared with the ARDS, confirming TAG relieves apoptosis (TAG + ARDS vs. ARDS, 0.45 ± 0.06 vs. 0.87 ± 0.08, 0.88 ± 0.06 vs. 1.36 ± 0.17, 0.63 ± 0.06 vs. 0.87 ± 0.05, respectively, p < 0.01; Figure 4D).