Abstract
Objective
To assess the impact of different doses of anti-interferon gamma (anti-IFNγ) F(ab′)2 fragments, administered prophylactically, on survival and on serum concentration of cytokines in a murine model of sepsis induced by cecal ligation and puncture (CLP). We further explore the impact of therapeutic administration of the most protective dose on survival.
Subjects and treatment
Balb/c mice were prophylactically treated by the intraperitoneal route with anti-IFNγ initiated 2 h before CLP and every 24 h for a total of five times in each of the following doses: 0.01, 0.1, or 1 mg/kg. Sham and control groups received sterile saline solution in a similar scheme.
Methods
Serum tumor necrosis factor (TNF), interleukin (IL)-1β, IL-6, IL-10 and IFNγ were measured at 3, 24 and 48 h after CLP by ELISA. Survival curves were compared using a Mantel–Haenzel method.
Results
Significant prophylactic protection was found only with 0.01 mg/kg, in association with regulation of IL-1β and IL-10 concentrations. As therapy, anti-IFNγ fragments were protective only when initiated 24 h after CLP.
Conclusions
Delicate modulation of IFNγ at the correct timing, even when the septic process has begun, is an exciting alternative to explore in the treatment of sepsis.
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Acknowledgments
This study was supported by Laboratorios Silanes, S. A. de C. V and FUNSALUD, Mexico.
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Márquez-Velasco, R., Martínez-Velázquez, A.X., Amezcua-Guerra, L.M. et al. Enhanced survival from CLP-induced sepsis following late administration of low doses of anti-IFNγ F(ab′)2 antibody fragments. Inflamm. Res. 60, 947–953 (2011). https://doi.org/10.1007/s00011-011-0355-0
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DOI: https://doi.org/10.1007/s00011-011-0355-0