Matrix metalloproteinase MMP-19 (RASI-1) is expressed on the surface of activated peripheral blood mononuclear cells

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Non-invasive In Vivo Fluorescence Optical Imaging of Inflammatory MMP Activity Using an Activatable Fluorescent Imaging Agent
06:46

Non-invasive In Vivo Fluorescence Optical Imaging of Inflammatory MMP Activity Using an Activatable Fluorescent Imaging Agent

Published on: May 8, 2017

R Sedlacek1, S Mauch, B Kolb

  • 1Faculty of Biology, University of Konstanz, Germany. Radek-Sedlacek@uni-konstanz.de

Immunobiology
|May 1, 1998
PubMed

Insights

Researchers identified matrix metalloproteinase-19 (MMP-19) as a novel autoantigen in rheumatoid arthritis (RA). This protein, found on activated immune cells, is recognized by autoantibodies in RA and systemic lupus erythematosus (SLE) patients, potentially contributing to joint damage.

Area of Science:

  • Immunology
  • Rheumatology
  • Molecular Biology

Background:

  • Rheumatoid arthritis (RA) pathogenesis involves complex autoimmune responses.
  • Identifying specific autoantigens is crucial for understanding RA and developing targeted therapies.

Purpose of the Study:

  • To characterize the autoimmune response in RA pathogenesis.
  • To identify novel autoantigens involved in RA-associated joint tissue destruction.

Main Methods:

  • Screening of a cDNA expression library from RA synovium with autologous IgG autoantibodies.
  • Identification of gene rasi-1 encoding a protein with sequence identity to matrix metalloproteinase-19 (MMP-19).
  • Detection of MMP-19 on activated peripheral blood mononuclear cells (PBMCs), TH1 lymphocytes, and Jurkat T lymphoma cells.

Main Results:

  • MMP-19 was identified as a novel autoantigen.
  • MMP-19 exhibits gelatinolytic activity.
  • Autoantibodies against MMP-19 were detected in 26% of RA patient sera and 33% of systemic lupus erythematosus (SLE) patient sera.

Conclusions:

  • MMP-19 is a novel autoantigen implicated in RA pathogenesis.
  • MMP-19 may play a role in the joint tissue destruction associated with RA.
  • The findings suggest MMP-19 as a potential target for diagnostic or therapeutic strategies in RA and SLE.

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