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Quantitative Measurement of Invadopodia-mediated Extracellular Matrix Proteolysis in Single and Multicellular Contexts
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Published on: August 27, 2012

The extracellular matrix protein mindin is a pattern-recognition molecule for microbial pathogens

You-Wen He1, Hong Li, Jun Zhang

  • 1Department of Immunology, Duke University Medical Center, Durham, North Carolina 27710, USA. he000004@mc.duke.edu

Nature Immunology
|December 24, 2003
PubMed

Insights

Mindin, an extracellular matrix protein, is crucial for innate immunity by binding microbes and enhancing macrophage clearance of bacterial infections. Mice lacking mindin show impaired bacterial infection responses.

Area of Science:

  • Immunology
  • Microbiology
  • Extracellular Matrix Biology

Background:

  • Microbial pathogens exploit host extracellular matrix (ECM) for infection.
  • ECM components can also function in innate immunity.
  • Mindin (spondin 2) is a conserved ECM protein involved in immune responses.

Purpose of the Study:

  • To investigate the role of mindin in innate immunity against microbial pathogens.
  • To determine if mindin acts as a pattern-recognition molecule.

Main Methods:

  • Analysis of mice lacking mindin expression.
  • Assessment of macrophage responses to microbial stimuli.
  • Direct binding assays between mindin and microbial components.
  • Evaluation of mindin's role in bacterial phagocytosis.

Main Results:

  • Mice lacking mindin exhibited impaired bacterial infection clearance.
  • Mindin-deficient macrophages showed defective responses to microbial stimuli.
  • Mindin directly binds to bacteria and their components.
  • Mindin functions as an opsonin, promoting macrophage phagocytosis of bacteria.

Conclusions:

  • Mindin is essential for initiating the innate immune response to bacterial pathogens.
  • Mindin acts as a unique ECM-based pattern-recognition molecule.
  • Mindin enhances bacterial clearance through macrophage-mediated phagocytosis.

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