Figure 2. Release of interleukin-6 (IL-6) by splenic macrophages (A) or peritoneal macrophages (B) and Kupffer cells (C) at 2 hours after sham operation or trauma-hemorrhage. Values are means ± SEM of seven or eight animals per group; analysis of variance, *P < .05 vs. proestrus sham; #P < .05 vs. ovariectomy sham.