PMID- 8328833 OWN - NLM STAT- MEDLINE DCOM- 19930809 LR - 20190514 IS - 0003-4932 (Print) IS - 1528-1140 (Electronic) IS - 0003-4932 (Linking) VI - 218 IP - 1 DP - 1993 Jul TI - Comparison of peripheral blood leukocyte kinetics after live Escherichia coli, endotoxin, or interleukin-1 alpha administration. Studies using a novel interleukin-1 receptor antagonist. PG - 79-90 AB - OBJECTIVE: This study was undertaken to evaluate whether hematologic and immunologic effects observed after bacteremia and endotoxemia in the host could be replicated by administration of recombinant human interleukin-1 alpha (IL-1 alpha) in a primate model. Furthermore, to determine whether endogenously produced interleukin-1 (IL-1) contributes to the changes observed during endotoxemia or gram-negative septic shock, a specific IL-1 receptor antagonist (IL-1 ra) was administered. SUMMARY BACKGROUND DATA: The lipopolysaccharide (LPS) component of the outer membrane of gram-negative bacteria initiates a constellation of metabolic and immunologic host responses. IL-1, a macrophage-derived cytokine, acts as a key mediator in the host response to infection and inflammation. METHODS: Baboons were randomly assigned to receive either recombinant human IL-1 alpha, LPS, or live Escherichia coli both with or without concomitant administration of IL-1ra. Blood was collected hourly and analyzed using flow cytometric techniques. RESULTS: Both endotoxemia and live E. coli bacteremia induced an acute granulocytopenia; however, the granulocytopenia gradually resolved in the endotoxemic group, but was sustained in the bacteremic group. An early lymphopenia and monocytopenia was elicited by LPS or E. coli and persisted throughout the experiment. Recombinant human IL-1 alpha induced the following: (1) an early, transient decline in granulocytes followed by a sustained granulocytosis; (2) a lymphopenia; and (3) a transient monocytopenia followed by a gradual return to baseline. Although IL-1ra had no effect on leukocyte kinetics with either live E. coli or LPS, the IL-1ra significantly abrogated the monocytopenia seen with recombinant human IL-1 alpha administration alone. CONCLUSIONS: These results suggest that administration of recombinant human IL-1 alpha can replicate some of the characteristic patterns of hematologic change associated with bacteremia and endotoxemia. However, an endogenous IL-1 response is not required for these changes to occur. Rather, the data suggest that other inflammatory mediators induced by endotoxemia or gram-negative bacteremia, such as tumor necrosis factor-alpha (TNF alpha), may be involved. FAU - Hawes, A S AU - Hawes AS AD - Department of Surgery, Cornell University Medical College, New York, New York. FAU - Fischer, E AU - Fischer E FAU - Marano, M A AU - Marano MA FAU - Van Zee, K J AU - Van Zee KJ FAU - Rock, C S AU - Rock CS FAU - Lowry, S F AU - Lowry SF FAU - Calvano, S E AU - Calvano SE FAU - Moldawer, L L AU - Moldawer LL LA - eng GR - CA 52108/CA/NCI NIH HHS/United States GR - GM 34695/GM/NIGMS NIH HHS/United States GR - GM 40586/GM/NIGMS NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Ann Surg JT - Annals of surgery JID - 0372354 RN - 0 (Endotoxins) RN - 0 (IL1RN protein, human) RN - 0 (Interleukin 1 Receptor Antagonist Protein) RN - 0 (Interleukin-1) RN - 0 (Lipopolysaccharides) RN - 0 (Sialoglycoproteins) SB - IM MH - Animals MH - Bacteremia/blood/immunology MH - Cell Division MH - Endotoxins/administration & dosage/*immunology MH - Escherichia coli/*immunology MH - Female MH - Granulocytes/cytology/immunology MH - Interleukin 1 Receptor Antagonist Protein MH - Interleukin-1/administration & dosage/*immunology MH - Kinetics MH - Leukocytes/cytology/*immunology MH - Lipopolysaccharides/administration & dosage/*immunology MH - Male MH - Monocytes/cytology/immunology MH - Papio MH - Random Allocation MH - Sialoglycoproteins/immunology MH - Toxemia/blood/immunology PMC - PMC1242904 EDAT- 1993/07/01 00:00 MHDA- 1993/07/01 00:01 PMCR- 1993/07/01 CRDT- 1993/07/01 00:00 PHST- 1993/07/01 00:00 [pubmed] PHST- 1993/07/01 00:01 [medline] PHST- 1993/07/01 00:00 [entrez] PHST- 1993/07/01 00:00 [pmc-release] AID - 10.1097/00000658-199307000-00013 [doi] PST - ppublish SO - Ann Surg. 1993 Jul;218(1):79-90. doi: 10.1097/00000658-199307000-00013.