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Toll-like receptor 2 (TLR2) induces migration and invasive mechanisms in rheumatoid arthritis

Trudy McGarry1, Douglas J Veale2, Wei Gao3

  • 1Department of Rheumatology, St. Vincent's University Hospital, Elm Park, Dublin Academic Health Care and The Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland. trudy.mc-garry@ucdconnect.ie.

Arthritis Research & Therapy
|June 10, 2015
PubMed
Abstract

Insights

Toll-like receptor 2 (TLR2) activation promotes rheumatoid arthritis (RA) cell migration and invasion. Blocking TLR2 or β1-integrin can inhibit these RA pathogenesis mechanisms, suggesting TLR2 as a therapeutic target.

Area of Science:

  • Immunology
  • Rheumatology
  • Cell Biology

Background:

  • Rheumatoid arthritis (RA) pathogenesis involves complex cellular mechanisms.
  • Toll-like receptor 2 (TLR2) plays a role in inflammatory responses.

Purpose of the Study:

  • To investigate the role of TLR2 in regulating migratory and invasive mechanisms in rheumatoid arthritis (RA).

Main Methods:

  • Assessed cell migration, invasion, matrix metalloproteinase (MMP) expression, and β-integrin binding in RA synovial tissue explants and cells.
  • Utilized TLR2 ligand (Pam3CSK4) and antibodies for TLR2 and β1-integrin blockade.
  • Employed techniques including Transwell assays, ELISA, RT-PCR, Western blot, and zymography.

Main Results:

  • TLR2 activation by Pam3CSK4 significantly increased cell migration, invasion, and MMP expression in RA models.
  • β1-integrin expression was elevated in RA tissue and critical for Pam3CSK4-induced migration and invasion.
  • Blocking TLR2 or β1-integrin inhibited key RA pathogenic mechanisms.

Conclusions:

  • TLR2 activation drives critical migratory and invasive processes in RA pathogenesis.
  • Targeting TLR2 presents a potential therapeutic strategy for RA treatment.

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