title: Interleukin-10 prevents early cytokine release in severe intraabdominal infection and sepsis.
abstract: Early release of macrophage-derived proinflammatory cytokines, such as tumor necrosis factor (TNF), interleukin (IL)-1, and IL-6, are important in the pathogenesis of septic shock and multisystem organ failure in various models of sepsis. IL-10 is a mediator that inhibits cytokine release from activated macrophages. The aim of this study was to determine if IL-10 would decrease serum cytokine elevation in a murine model of cecal ligation and puncture (CLP). CLP in animals is a model that closely mimics the physiologic changes seen in human sepsis. Four groups of 14 female Swiss-Webster mice were used. Group 1 underwent laparotomy alone, groups 2, 3, and 4 underwent laparotomy and CLP. Groups 1 and 2 received intraperitoneal (IP) saline injections to serve as control vehicle. Group 3 (prophylactic) received 10,000 U IP IL-10 1 hr prior to CLP and every 3 hr thereafter. Group 4 (therapeutic) received 10,000 U IP IL-10 1 hr following CLP and every 3 hr thereafter. Animals were sacrificed at 3 and 9 hr following CLP. Serum TNF-alpha, IL-1 beta, and IL-6 were determined by enzyme-linked immunosorbent assay (ELISA), CLP produced a significant rise in serum TNF,IL-6, and IL-1 in untreated controls. Prophylactic or therapeutic administration of IL-10 significantly attenuated this early rise in serum cytokines. These results support the hypothesis that (1) CLP produces an early systemic rise in macrophage-derived cytokines and (2) IL-10 given either before or after the onset of CLP-induced intraabdominal infection and sepsis is able to inhibit this early release of macrophage-derived systemic mediators. IL-10 has potential clinical benefits in the therapeutic management of intraabdominal infection and sepsis.
authors.affiliation: Department of Surgery, University of California Los Angeles, USA.
authors.forename: A J
authors.initials: AJ
authors.lastname: Rongione
authors.forename: A M
authors.initials: AM
authors.lastname: Kusske
authors.forename: S W
authors.initials: SW
authors.lastname: Ashley
authors.forename: H A
authors.initials: HA
authors.lastname: Reber
authors.forename: D W
authors.initials: DW
authors.lastname: McFadden
mesh_terms: D000006:Abdomen, Acute / Q000503:physiopathology; D000208:Acute Disease; D000818:Animals; D002432:Cecum / Q000293:injuries; D005260:Female; D007375:Interleukin-1 / Q000097:blood*; D016753:Interleukin-10 / Q000494:pharmacology*; D015850:Interleukin-6 / Q000097:blood*; D007410:Intestinal Diseases / Q000503:physiopathology*; D051379:Mice; D018805:Sepsis / Q000503:physiopathology*; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*
chemical_list: D007375:Interleukin-1; D015850:Interleukin-6; D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10