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Updated: Sep 4, 2025

Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease
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Toll-like receptor triggering in systemic sclerosis: time to target

Steven O'Reilly1

  • 1Biosciences, Durham University, Durham, UK.

Rheumatology (Oxford, England)
|July 21, 2022
PubMed

Insights

Scleroderma (SSc) involves vascular issues, inflammation, and fibrosis. Toll-like receptors (TLRs) activation in SSc fibroblasts drives collagen production, contributing to disease pathogenesis and fibrosis.

Area of Science:

  • Immunology
  • Rheumatology
  • Cell Biology

Background:

  • Scleroderma (SSc) is a complex autoimmune disease characterized by vascular abnormalities, inflammation, and progressive fibrosis in the skin and lungs.
  • Toll-like receptors (TLRs) are crucial in innate immunity, recognizing danger signals and initiating inflammatory responses.
  • The interplay between inflammation and fibrosis is central to SSc pathogenesis, with fibroblast activation playing a key role.

Approach:

  • This review synthesizes current evidence on the expression and function of TLRs in SSc.
  • It examines the mechanisms by which TLR ligation on fibroblasts contributes to collagen production and fibrosis.
  • The review also explores potential therapeutic strategies targeting TLRs to mitigate SSc-associated fibrosis.

Key Points:

  • TLR activation on SSc fibroblasts directly stimulates collagen synthesis, a key feature of scleroderma.
  • Damage-associated molecular patterns (DAMPs) are implicated in the fibrotic processes observed in SSc.
  • Understanding TLR signaling pathways offers insights into disease mechanisms and potential therapeutic targets.

Conclusions:

  • TLRs play a significant role in the pathogenesis of SSc, particularly in driving fibrosis.
  • Targeting TLRs presents a promising therapeutic avenue for managing inflammation and fibrosis in SSc.
  • Further research into TLR-mediated pathways could lead to novel treatments for scleroderma.
Keywords:
DAMPsLPSSSccytokinesfibrosisinflammationtoll-like receptors

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