Previous Article | Next Article ![]()
Infect. Immun., 09 1997, 3847-3851, Vol 65, No. 9
KR Walley, NW Lukacs, TJ Standiford, RM Strieter and SL Kunkel
We hypothesized that chemokines may play important roles in a cecal
ligation and puncture (CLP) model of septic peritonitis in CD-1 mice.
Concentrations of C-X-C (macrophage inflammatory protein 2 [MIP-2] and
ENA-78) and C-C (MIP-1alpha and JE) chemokines were measured (by enzyme-
linked immunosorbent assay) in serum, peritoneal lavage fluid, lung, and
liver at 4, 8, 24, 48, and 96 h after CLP. Significant elevations in all
measured chemokines occurred in peritoneal fluid after CLP (P < 0.05).
MIP-2, in particular, increased dramatically (>400-fold, P < 0.001)
in peritoneal fluid, serum, and to a lesser extent lung and liver (P <
0.05). Increased MIP-2 was correlated with severity of sepsis (P <
0.001). To determine the significance of this finding, mice were passively
immunized prior to CLP with polyclonal antibody to MIP- 2, which decreased
mortality from 85 to 38% at 96 h (P < 0.01). To further understand the
mechanism of the effect of MIP-2, additional measurements demonstrated that
anti-MIP-2 prior to CLP decreased the percent neutrophils in peritoneal
fluid (55% +/- 12%, compared with 82% +/- 10% in controls), but no
significant changes in tumor necrosis factor alpha, interleukin-6, or
interleukin-10 occurred. MIP-2 contributes to the inflammatory response and
overall mortality in this model of severe septic peritonitis, possibly by
increasing recruitment of neutrophils, which clear bacteria but may also
injure the host.
Copyright © 1997, American Society for Microbiology
Elevated levels of macrophage inflammatory protein 2 in severe murine peritonitis increase neutrophil recruitment and mortality
Pulmonary Research Laboratory, University of British Columbia, Vancouver, Canada.
This article has been cited by other articles:
| J. Bacteriol. | J. Virol. | Eukaryot. Cell |
|---|
| Microbiol. Mol. Biol. Rev. | Clin. Vaccine Immunol. | All ASM Journals |
|---|