Levels of (A) KC and (B) MIP-2 were measured in lung homogenates of young and aged mice at 6 and 24 h after sham (open bars) or burn (solid bars) injury. Data are represented as average concentration in pg/mg protein ± SEM; n =8–13 mice per group; *, P < 0.05, compared with age- and time-matched sham groups; #, P < 0.05, compared with burn animals at 6 h;†, P < 0.05, compared with the young burn group at the same time-point.