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Therapeutic targets in fibrotic pathways

Travis Lear1, Bill B Chen2

  • 1Department of Environmental and Occupational Health, School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA; Department of Medicine, Acute Lung Injury Center of Excellence, University of Pittsburgh, Pittsburgh, PA 15213, USA.

Cytokine
|September 23, 2016
PubMed

Insights

Researchers identified Fibrosis Inducing E3 Ligase 1 (FIEL1) as a key regulator in pulmonary fibrosis. Inhibiting FIEL1 shows promise for treating this complex lung disease.

Area of Science:

  • Pulmonary Medicine
  • Molecular Biology
  • Drug Discovery

Background:

  • Pulmonary fibrosis is a complex lung disease with heterogeneous pathogenesis, presenting therapeutic challenges.
  • Transforming growth factor-beta (TGF-β) signaling is a critical pathway implicated in driving fibrotic processes and reducing lung function.

Purpose of the Study:

  • To investigate the role of the E3 ligase Fibrosis Inducing E3 Ligase 1 (FIEL1) in regulating TGF-β signaling and pulmonary fibrosis.
  • To evaluate the therapeutic potential of targeting FIEL1 in preclinical models of lung fibrosis.

Main Methods:

  • Investigated the interaction between FIEL1 and PIAS4 in the context of TGF-β signaling.
  • Utilized bleomycin-induced murine models to assess the impact of FIEL1 modulation on pulmonary fibrosis.
  • Developed and tested a small molecule inhibitor of FIEL1 (BC-1485).

Main Results:

  • FIEL1 was identified as a regulator of TGF-β signaling via selective degradation of PIAS4.
  • FIEL1 exacerbates bleomycin-induced pulmonary fibrosis in mice; FIEL1 silencing attenuates this fibrotic phenotype.
  • The FIEL1 inhibitor BC-1485 prevented PIAS4 degradation and ameliorated fibrosis in murine models.

Conclusions:

  • FIEL1 is a significant regulator in the pathogenesis of pulmonary fibrosis.
  • Targeting the FIEL1/PIAS4 pathway represents a promising therapeutic strategy for pulmonary fibrosis.
Keywords:
FIEL1FibrosisIPFTGFbetaUbiquitin

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