Role of IFN-γ in bacterial containment in a model of intra-abdominal sepsis

Gang Qiu, Congli Wang, Rodman Smith, Kathryn Harrison, Kingsley Yin

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Interferon-gamma (IFN-γ) is a specific activator of macrophage function and plays a critical role in the host immune defense to bacterial infection. In this study we examined the role of IFN-γ in the regulation of bacterial load in the cecal ligation and puncture (CLP) model of intra-abdominal sepsis in the rat. In initial studies, levels of IL-12, MCP-1, and IFN-γ were measured in the peritoneal lavage fluid 24 and 48 h after CLP. IL-12 and MCP-1 levels were both significantly increased at 24 h after CLP compared to sham controls and this difference was maintained at 48 h after CLP. Interestingly, IFN-γ levels were not significantly increased 24 h after CLP, but were increased at 48 h after CLP. These results clearly suggest that although an inflammatory response had occurred 24 h post-surgery, with increases in the proinflammatory cytokine IL-12 and the potent chemotactic agent MCP-1, levels of IFN-γ in CLP rats were similar to sham controls. To further investigate the role of IFN-γ on the development of sepsis we examined the effect(s) of administering anti-IFN-γ antibody on bacterial load after CLP. We show that use of anti-IFN-γ antibody can significantly decrease bacterial load in the peritoneum. The mechanism of the effect(s) of anti-IFN-γ is probably by increasing intestinal adhesions to seal the cecum and reduce bacterial movement into the peritoneum.

Original languageEnglish (US)
Pages (from-to)425-429
Number of pages5
JournalShock
Volume16
Issue number6
DOIs
StatePublished - Jan 1 2001

Fingerprint

Interferon-gamma
Punctures
Sepsis
Ligation
Bacterial Load
Interleukin-12
Peritoneum
Activator Appliances
Peritoneal Lavage
Cecum
Antibodies
Ascitic Fluid
Bacterial Infections
Macrophages
Cytokines

All Science Journal Classification (ASJC) codes

  • Critical Care and Intensive Care Medicine
  • Emergency Medicine

Cite this

Qiu, Gang ; Wang, Congli ; Smith, Rodman ; Harrison, Kathryn ; Yin, Kingsley. / Role of IFN-γ in bacterial containment in a model of intra-abdominal sepsis. In: Shock. 2001 ; Vol. 16, No. 6. pp. 425-429.
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Role of IFN-γ in bacterial containment in a model of intra-abdominal sepsis. / Qiu, Gang; Wang, Congli; Smith, Rodman; Harrison, Kathryn; Yin, Kingsley.

In: Shock, Vol. 16, No. 6, 01.01.2001, p. 425-429.

Research output: Contribution to journalArticle

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