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04:44
Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease
Published on: June 16, 2020
Fibrosis in systemic sclerosis: common and unique pathobiology
Swati Bhattacharyya1, Jun Wei1, Warren G Tourtellotte1
1Departments of Medicine and Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
Fibrogenesis & Tissue Repair
|December 25, 2012
Summary
Systemic sclerosis (SSc) fibrosis involves fibroblast activation pathways. Nuclear receptor PPAR-γ may regulate fibrosis progression, offering potential therapeutic targets.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Systemic sclerosis (SSc) is a complex polygenic autoimmune disease characterized by proliferative/obliterative vasculopathy and fibrosis.
- Fibrosis in SSc shares features with other fibrotic diseases but has unique pathobiologic characteristics.
- Key pathways implicated in SSc pathogenesis include transforming growth factor-β (TGF-β), Wnts, innate immune receptors, oxidative stress, and reactive oxygen species (ROS).
Purpose of the Study:
- To explore the pathobiology of fibrosis in systemic sclerosis (SSc).
- To investigate the role of nuclear orphan receptor PPAR-γ in regulating fibroblast activation and mesenchymal progenitor cell differentiation in SSc.
- To identify potential therapeutic targets for SSc fibrosis through understanding signaling pathway perturbations.
Main Methods:
- Review of existing literature on SSc pathogenesis, focusing on fibrotic mechanisms.
- Analysis of signaling pathways involved in fibroblast activation, including TGF-β, Wnts, and innate immune receptors.
- Examination of the role of transcriptional regulators, epigenetic factors, microRNAs, and PPAR-γ in fibrotic responses.
Main Results:
- Fibroblast activation is driven by TGF-β, Wnts, innate immune receptors, oxidative stress, and ROS.
- The precise roles of endothelial-mesenchymal transition and bone marrow-derived fibrocytes in SSc require further investigation.
- PPAR-γ appears crucial for controlling fibroblast activation and mesenchymal progenitor cell differentiation; defects in PPAR-γ may drive uncontrolled fibrosis in SSc.
Conclusions:
- Understanding the molecular mechanisms of SSc fibrosis, including the role of PPAR-γ, is essential for developing targeted therapies.
- Identifying specific signaling pathway perturbations allows for the selective targeting of fibrosis.
- Drug repurposing strategies may offer innovative treatment options for SSc-associated fibrosis.
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