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MCP-1 protects mice in lethal endotoxemia

D A Zisman1, S L Kunkel, R M Strieter

  • 1Department of Medicine, Division of Pulmonary and Critical Care Medicine, The University of Michigan Medical School, Ann Arbor, Michigan 48109-0360, USA.

The Journal of Clinical Investigation
|June 15, 1997
PubMed
Summary

Monocyte chemoattractant protein-1 (MCP-1) plays a protective role in sepsis. This study shows MCP-1 shifts cytokine balance towards anti-inflammatory responses, improving survival in endotoxemia models.

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Area of Science:

  • Immunology
  • Sepsis Pathophysiology

Background:

  • Sepsis involves excessive proinflammatory cytokine production, leading to severe outcomes like shock and organ dysfunction.
  • Monocyte chemoattractant protein-1 (MCP-1) is investigated for its role in mediating sepsis.

Purpose of the Study:

  • To evaluate the role of MCP-1 in endotoxin-induced sepsis in mice.
  • To determine if MCP-1 acts as a protective or detrimental factor during endotoxemia.

Main Methods:

  • Mice were challenged with lipopolysaccharide (LPS) to induce endotoxemia.
  • MCP-1 levels were measured in plasma, lung, and liver.
  • Mice were passively immunized with anti-MCP-1 antibodies or treated with recombinant MCP-1.
  • Mortality rates and cytokine levels (TNF-α, IL-10, IL-12) were assessed.

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Main Results:

  • LPS administration significantly increased MCP-1 levels.
  • Passive immunization against MCP-1 dramatically increased mortality (10% to 65%) and elevated TNF-α and IL-12 levels.
  • Administration of recombinant MCP-1 significantly protected mice from lethality, increasing IL-10 and decreasing IL-12 and TNF-α levels.

Conclusions:

  • MCP-1 is a protective cytokine in murine endotoxemia.
  • MCP-1 exerts its protective effects by promoting an anti-inflammatory cytokine profile.
  • Targeting MCP-1 could be a therapeutic strategy for sepsis.