Enhanced survival from CLP-induced sepsis following late administration of low doses of anti-IFNγ F(ab')2 antibody fragments.
Inflamm Res 2011;
60:947-53. [PMID:
21725677 DOI:
10.1007/s00011-011-0355-0]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2009] [Revised: 06/01/2011] [Accepted: 06/14/2011] [Indexed: 11/24/2022] Open
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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