Effects of MEK1/2 inhibition on the expression of HSP32 induced by HBO. The phosphorylation of MEK1/2 was detected after HBO exposure (A). Neurons were pretreated with U0126 (10 μM) or trametinib (10 μM) 30 min before HBO exposure, and the phosphorylation of MEK1/2 was detected immediately after HBO exposure (B), the expression of HSP32 was detected 12 h after HBO exposure (C). Significance compared with Air group, **p<0.01; significance compared with HBO group ††p<0.01. MEK1/2, mitogen-activated and extracellular signal-regulated kinases; Seq, sequence.