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Protection against lethal Escherichia coli bacteremia in baboons (Papio anubis) by pretreatment with a 55-kDa TNF receptor (CD120a)-Ig fusion protein, Ro 45-2081.

K J Van Zee, L L Moldawer, H S Oldenburg, W A Thompson, S A Stackpole, W J Montegut, M A Rogy, C Meschter, H Gallati, C D Schiller, W F Richter, H Loetscher, A Ashkenazi, S M Chamow, F Wurm, S E Calvano, S F Lowry and W Lesslauer
J Immunol March 15, 1996, 156 (6) 2221-2230;
K J Van Zee
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L L Moldawer
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H S Oldenburg
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W A Thompson
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S A Stackpole
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W J Montegut
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M A Rogy
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C Meschter
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H Gallati
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C D Schiller
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W F Richter
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H Loetscher
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A Ashkenazi
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S M Chamow
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F Wurm
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S E Calvano
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S F Lowry
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W Lesslauer
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Abstract

Fusion proteins of the human 55-kDa TNF receptor extracellular domain with hinge and C2/C3 constant domains of human IgG1 or IgG3 heavy chains were tested in a primate sepsis model. Twenty-four baboons received 4.6, or 0.2 mg/kg of TNFR5-G1,3, or placebo, before the administration of a lethal dose of live Escherichia coli. Treatment with TNFR5-G1,3 decreased 5-day mortality from 88% in the placebo group to 12% in the TNFR5-G1,3-treated animals (p < 0.01 by Fisher's exact test). Treatments with TNR5-G1 and TNFR5-G3 in doses from 0.2 to 4.6 mg/kg were efficacious. Free plasma TNF was neutralized by all treatments, but inactive TNF/TNFR5-G1,3 complexes remained in circulation for prolonged periods. TNFR5-1,3 treatments attenuated the hemodynamic disturbances, reduced fluid requirements, and decreased the systemic IL-1 beta, IL-6, and IL-8 responses. In addition, TNFR5-G1,3 treatment shortened the granulocytopenia and reduced the loss of cellular TNF receptors from granulocytes. The decrease in fibrinogen concentrations and increase in prothrombin and partial thromboplastin times were significantly attenuated by TNFR5-G1,3 treatment. TNFR5-G1,3 treatment markedly attenuated the rise in plasma lactate concentration. Histologic studies of TNFR5-G1,3 revealed dose-dependent protection against tissue injury by Escherichia coli administration.

  • Copyright © 1996 by American Association of Immunologists

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The Journal of Immunology
Vol. 156, Issue 6
15 Mar 1996
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Protection against lethal Escherichia coli bacteremia in baboons (Papio anubis) by pretreatment with a 55-kDa TNF receptor (CD120a)-Ig fusion protein, Ro 45-2081.
K J Van Zee, L L Moldawer, H S Oldenburg, W A Thompson, S A Stackpole, W J Montegut, M A Rogy, C Meschter, H Gallati, C D Schiller, W F Richter, H Loetscher, A Ashkenazi, S M Chamow, F Wurm, S E Calvano, S F Lowry, W Lesslauer
The Journal of Immunology March 15, 1996, 156 (6) 2221-2230;

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Protection against lethal Escherichia coli bacteremia in baboons (Papio anubis) by pretreatment with a 55-kDa TNF receptor (CD120a)-Ig fusion protein, Ro 45-2081.
K J Van Zee, L L Moldawer, H S Oldenburg, W A Thompson, S A Stackpole, W J Montegut, M A Rogy, C Meschter, H Gallati, C D Schiller, W F Richter, H Loetscher, A Ashkenazi, S M Chamow, F Wurm, S E Calvano, S F Lowry, W Lesslauer
The Journal of Immunology March 15, 1996, 156 (6) 2221-2230;
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