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PDGF in organ fibrosis.

Barbara Mara Klinkhammer1, Jürgen Floege2, Peter Boor3

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Fibrosis, a detrimental tissue repair response, involves extracellular matrix deposition and affects all organs. Platelet-derived growth factor (PDGF) signaling drives fibrosis, presenting potential therapeutic targets.

Keywords:
Extracellular matrixFibroblastsFibrogenesisGrowth factorMyofibroblastsPericytesSmooth muscle cells

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Area of Science:

  • Biomedical Science
  • Cell Biology
  • Pathology

Background:

  • Fibrosis is an excessive extracellular matrix deposition during tissue repair, often detrimental in chronic diseases.
  • It affects all organs, leading to irreversible tissue dysfunction and impacting a large patient population.
  • Pathological fibrosis is driven by stromal mesenchymal cells activated by various signaling pathways.

Purpose of the Study:

  • To review the critical role of platelet-derived growth factor (PDGF) signaling in organ fibrosis.
  • To focus on the less-understood PDGF-C and -D ligands in fibrotic processes.
  • To explore PDGF as a potential therapeutic target for anti-fibrotic strategies.

Main Methods:

  • Literature review of studies on PDGF signaling in fibrosis.
  • Analysis of PDGF receptor (PDGFR) alpha and beta expression and activation in stromal mesenchymal cells.
  • Discussion of recent findings on PDGF-C and -D ligands.

Main Results:

  • PDGF signaling is a central mediator in fibrosis, driving key fibrotic processes.
  • Stromal mesenchymal cells, including fibroblasts, pericytes, and myofibroblasts, are key executors of fibrosis.
  • PDGFR activation promotes cell proliferation, migration, and extracellular matrix production.

Conclusions:

  • PDGF signaling is a crucial pathway in the pathogenesis of organ fibrosis.
  • Emerging PDGF ligands (PDGF-C, -D) warrant further investigation in fibrotic diseases.
  • Targeting PDGF signaling presents opportunities and challenges for developing anti-fibrotic therapies.