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Transfer of Manipulated Tumor-associated Neutrophils into Tumor-Bearing Mice to Study their Angiogenic Potential In Vivo
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Nucleolin mediates the antiangiogenesis effect of the pseudopeptide N6L

Charalampos Birmpas1, Jean Paul Briand, Josẻ Courty

  • 1Department of Biology, University of Patras, Patras, Greece.

BMC Cell Biology
|November 14, 2012
PubMed
Abstract

Insights

N6L, a pseudopeptide targeting cell surface nucleolin, inhibits angiogenesis by blocking endothelial cell adhesion, proliferation, and migration. This therapeutic agent shows promise for treating diseases linked to excessive blood vessel formation.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Cell surface nucleolin is over-expressed on activated cells and plays a role in angiogenesis.
  • Nucleolin acts as a receptor for various ligands involved in pathophysiological processes.
  • N6L is a synthetic pseudopeptide that binds cell surface nucleolin and inhibits cell proliferation.

Purpose of the Study:

  • To investigate the mechanisms of action of pseudopeptide N6L on angiogenesis.
  • To evaluate the effects of N6L on human umbilical vein endothelial cells (HUVECs).

Main Methods:

  • Assessing HUVEC adhesion, proliferation, and migration in vitro.
  • Measuring MMP-2 levels in HUVECs.
  • Analyzing the activation of SRC, ERK1/2, AKT, and FAK kinases.
  • Utilizing siRNA to downregulate nucleolin expression.

Main Results:

  • N6L inhibits HUVEC adhesion, proliferation, and migration without inducing apoptosis.
  • N6L downregulates MMP-2 expression in HUVECs.
  • N6L inhibits the activation of SRC, ERK1/2, AKT, and FAK kinases.
  • Nucleolin downregulation confirmed its role in N6L's biological actions.

Conclusions:

  • N6L demonstrates significant anti-angiogenic properties by inhibiting key cellular processes and signaling pathways.
  • N6L's mechanism involves the downregulation of MMP-2 and the inhibition of SRC, ERK1/2, AKT, and FAK kinases.
  • N6L represents a potential therapeutic agent for diseases characterized by excessive angiogenesis.

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