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Published on: September 15, 2017

Microparticles as mediators of cellular cross-talk in inflammatory disease

Jörg H W Distler1, Lars C Huber, Steffen Gay

  • 1Department of Internal Medicine 3, University of Erlangen, Erlangen, Germany.

Autoimmunity
|December 21, 2006
PubMed

Insights

Microparticles, small cell-derived vesicles, are key in intercellular communication during inflammation. They can promote or reduce inflammation and are implicated in rheumatologic diseases, offering insights into novel cellular signaling pathways.

Area of Science:

  • Cell Biology
  • Immunology
  • Biochemistry

Background:

  • Microparticles are vesicles released from cells during activation or apoptosis.
  • They bud from the cell surface and can be identified by cell surface markers and annexin V.
  • Microparticles play a role in intercellular communication, particularly in inflammation.

Purpose of the Study:

  • To explore the role of microparticles in intercellular communication.
  • To investigate the pro- and anti-inflammatory properties of microparticles.
  • To examine the involvement of microparticles in rheumatologic diseases.

Main Methods:

  • In vitro studies analyzing microparticle release and function.
  • Staining for cell surface markers and annexin V to identify microparticles.
  • Observational studies in patients with rheumatologic diseases.

Main Results:

  • Microparticles transfer molecules like chemokine receptors and arachidonic acid between cells.
  • They can activate complement, promote leukocyte rolling, and stimulate pro-inflammatory mediator release.
  • Microparticles can also induce immune cell apoptosis and anti-inflammatory mediator production.
  • Elevated microparticle levels are observed in systemic sclerosis, vasculitis, and antiphospholipid antibody syndrome.
  • Leukocyte-derived microparticles stimulate cytokine and matrix metalloproteinase production by synovial fibroblasts.

Conclusions:

  • Microparticles are versatile mediators of intercellular communication with both pro- and anti-inflammatory effects.
  • They are implicated in the pathogenesis of rheumatologic diseases.
  • Microparticles represent novel signaling pathways in cellular cross-talk, bridging cytokine signaling and direct cell-cell contact.

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