Six-hour exposure to mechanical ventilation significantly increased nuclear factor κB activation in hippocampal tissues. (A) Nuclear factor κB (NF-κB) p65 expression was detected by Western blot analysis. (B) NF-κB p65 protein expression was significantly increased in the mechanical ventilation (MV) groups compared with the surgery groups (S) at 6 hours, 1 day and 3 days postsurgery or post-MV. Western blot assay data are expressed as mean ± standard error of the mean. n =6/group. *P <0.05 compared with group S. †
P <0.05 compared with group C.