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Related Experiment Videos

Interleukin 10 protects mice from lethal endotoxemia

M Howard1, T Muchamuel, S Andrade

  • 1DNAX Research Institute, Palo Alto, California 94304.

The Journal of Experimental Medicine
|April 1, 1993
PubMed
Summary

Interleukin 10 (IL-10) effectively protected mice from endotoxin-induced shock by suppressing inflammatory monokines. This suggests IL-10 is a promising anti-inflammatory treatment for conditions like bacterial sepsis.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Pharmacology

Background:

  • Interleukin 10 (IL-10) is known to inhibit the production of pro-inflammatory cytokines such as IL-1, IL-6, and TNF-alpha in vitro.
  • Neutralization of IL-10 in mice results in increased levels of these same monokines, indicating a regulatory role.

Purpose of the Study:

  • To investigate whether the monokine-suppressing property of IL-10 confers protection against lipopolysaccharide (LPS)-induced shock in mice.
  • To evaluate IL-10 as a potential therapeutic agent for inflammatory conditions.

Main Methods:

  • BALB/c mice were administered recombinant murine IL-10 before or concurrently with a lethal dose of LPS.
  • The protective effects were assessed, and the impact on endotoxin-induced TNF-alpha release was measured.
  • Neutralizing anti-IL-10 antibodies were used to confirm the specificity of IL-10's effect.

Main Results:

  • A single injection of 0.5-1 microgram of recombinant murine IL-10 reproducibly protected mice from lethal LPS-induced shock.
  • IL-10 administration, even 30 minutes after LPS, conferred protection.
  • The protective effect was abrogated by anti-IL-10 antibodies and correlated with reduced TNF-alpha levels.

Conclusions:

  • Interleukin 10 demonstrates significant protective effects against LPS-induced shock in mice.
  • IL-10 effectively suppresses endotoxin-induced inflammatory responses, particularly TNF-alpha release.
  • These findings support the potential of IL-10 as a therapeutic candidate for bacterial sepsis and as a general anti-inflammatory agent.

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