WT mice were subjected to a single i.v. dose of
rSectm1a (rSEC: 300 μg/kg) or IgG2a (190 μg/kg, stoichiometrically
matched amount) at 0.5 h post-CLP surgery. (A) Survival was monitored for 4 days
(*, P < 0.05; n = 8 for rSectm1a-treated group, n=15 for
IgG2a-treated group). (B and C) The spleen and lung tissues were collected from
both IgG2a-treated and rSectm1a-treated mice at 24 h post-CLP, and wet weight to
dry weight ratios of spleen (B) and lung (C) were quantified (n = 5–6).
(D-F) Bacterial burdens in blood (D), spleen (E) and lung (F) were compared
between two treatment groups at 24 h post-CLP (n = 5–6). (G-H) Serum
levels of cytokines (G: IL-6 and H: TNFα) of two mouse groups were
measured at 24 h after CLP surgery (n = 5–6). Data are representative of
two independent experiments. The survival results were analyzed by Log-rank
(Mantel-Cox) test. All other results are presented as
mean ± SEM and analyzed by student’s t test.