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The extracellular matrix protein matrilin-2 induces post-burn inflammatory responses as an endogenous danger signal

Yunfei Chi1, Jiake Chai2, Chengfeng Xu1

  • 1Department of Burn and Plastic Surgery, The First Affiliated Hospital of PLA General Hospital, 51 Fucheng Road, Beijing, 100048, China.

Inflammation Research : Official Journal of the European Histamine Research Society ... [Et Al.]
|August 15, 2015
PubMed
Abstract

Insights

Matrilin-2 is released after burn injury and acts as a danger signal, triggering inflammatory responses. This protein contributes to post-burn inflammation, partly via Toll-like receptor 4 (TLR4).

Area of Science:

  • Biochemistry
  • Immunology
  • Trauma Research

Background:

  • Burn injuries trigger complex inflammatory responses.
  • Endogenous danger signals play a crucial role in modulating post-burn inflammation.
  • Matrilin-2 is a protein of interest in inflammatory processes.

Purpose of the Study:

  • To determine if matrilin-2 is released following burn injury.
  • To investigate matrilin-2's role in inducing post-burn inflammatory responses.
  • To elucidate the mechanism by which matrilin-2 influences inflammation.

Main Methods:

  • Quantified matrilin-2 levels in burn patients and mice using ELISA and real-time PCR.
  • Assessed inflammatory cytokine production in matrilin-2-deficient and wild-type mice.
  • Activated macrophages with recombinant matrilin-2 and anti-Toll-like receptor 4 (TLR4) antibody.

Main Results:

  • Matrilin-2 serum levels were significantly elevated in burn patients and mice.
  • Matrilin-2-deficient mice exhibited reduced inflammatory cytokine production and neutrophil infiltration.
  • Exogenous matrilin-2 stimulated pro-inflammatory cytokine release in macrophages, inhibited by anti-TLR4 antibody.

Conclusions:

  • Matrilin-2 functions as an endogenous danger signal after burn injury.
  • Matrilin-2 contributes to post-burn inflammatory responses.
  • The inflammatory effects of matrilin-2 are partly mediated through TLR4.
Keywords:
BurnExtracellular matrixInflammationMatrilin-2Toll-like receptor 4

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