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IGF-I regulates HT1080 fibrosarcoma cell migration through a syndecan-2/Erk/ezrin signaling axis

Maria Mytilinaiou1, Dragana Nikitovic1, Aikaterini Berdiaki1

  • 1Laboratory of Anatomy-Histology-Embryology, School of Medicine, University of Crete, 71003 Heraklion, Greece.

Experimental Cell Research
|October 1, 2017
PubMed

Insights

Syndecan-2 (SDC-2) is crucial for fibrosarcoma cell migration, enhancing Insulin-like Growth Factor-I (IGF-I) signaling. Reduced SDC-2 impairs cell movement and downstream signaling pathways essential for cancer progression.

Area of Science:

  • Cell Biology
  • Cancer Research
  • Molecular Oncology

Background:

  • Fibrosarcoma is a mesenchymal tumor driven by fibroblast proliferation.
  • Insulin-like Growth Factor-I (IGF-I) is a key anabolic growth factor implicated in cancer progression.
  • Syndecan-2 (SDC-2), a cell membrane proteoglycan, is investigated for its role in cell motility.

Purpose of the Study:

  • To investigate the role of Syndecan-2 (SDC-2) in IGF-I-dependent fibrosarcoma cell migration.
  • To elucidate the molecular mechanisms by which SDC-2 influences IGF-I signaling pathways.
  • To determine the relationship between SDC-2, IGF-I receptor (IGF-IR), and downstream signaling molecules.

Main Methods:

  • Utilized SDC-2-deficient HT1080 fibrosarcoma cells.
  • Performed co-localization studies of SDC-2 and IGF-IR.
  • Assessed ERK1/2 activation and ezrin phosphorylation.
  • Analyzed actin polymerization and SDC-2 expression via Western blot and RT-PCR.

Main Results:

  • SDC-2 deficiency significantly attenuated IGF-I-dependent chemotactic migration.
  • SDC-2 co-localized with IGF-IR upon IGF-I stimulation, enhancing ERK1/2 activation.
  • IGF-I increased ezrin phosphorylation and its association with SDC-2, promoting actin polymerization.
  • IGF-I upregulated SDC-2 expression at both mRNA and protein levels.

Conclusions:

  • SDC-2 plays a critical role in mediating IGF-I-dependent fibrosarcoma cell migration.
  • SDC-2 facilitates IGF-I-induced signaling by co-localizing with IGF-IR and enhancing downstream pathways.
  • SDC-2 is a novel therapeutic target for modulating fibrosarcoma progression.
Keywords:
Cell migrationEzrinFibrosarcomaInsulin-like growth factor receptorSyndecan 2

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