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S100A8/A9: From basic science to clinical application.

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The S100A8/A9 protein, released by immune cells, acts as an alarmin that drives inflammation. Targeting S100A8/A9 shows promise for diagnosing and treating inflammatory and autoimmune diseases.

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Area of Science:

  • Immunology
  • Biochemistry
  • Molecular Biology

Background:

  • Neutrophils and monocytes are key immune cells involved in inflammation.
  • S100A8/A9 is a heterodimeric protein abundant in these cells.
  • Extracellular S100A8/A9 functions as an alarmin, modulating immune responses.

Purpose of the Study:

  • To provide a comprehensive overview of S100A8/A9 structure and function.
  • To explore the diagnostic and therapeutic potential of S100A8/A9.

Main Methods:

  • Literature review of S100A8/A9 research.
  • Analysis of S100A8/A9's role in inflammatory pathways.
  • Examination of S100A8/A9 as a biomarker and therapeutic target.

Main Results:

  • S100A8/A9 interacts with TLR4 and RAGE, promoting inflammation.
  • S100A8/A9 (MRP8/14) is a biomarker for inflammatory diseases like IBD and RA.
  • Pre-clinical studies show S100A8/A9 can be used for imaging and that inhibitors are effective in autoimmune models.

Conclusions:

  • S100A8/A9 is a critical mediator of inflammation with significant diagnostic and therapeutic implications.
  • Targeting S100A8/A9 offers a promising strategy for managing inflammatory and autoimmune conditions.