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VEGF receptor signal transduction.

T Matsumoto1, L Claesson-Welsh

  • 1Department of Genetics and Pathology, Uppsala University, Rudbeck Laboratory, Uppsala, Sweden.

Science'S STKE : Signal Transduction Knowledge Environment
|December 13, 2001
PubMed
Summary

Vascular endothelial growth factors (VEGFs) and their receptors are crucial for blood vessel formation. This review details VEGF receptor signaling, focusing on VEGF receptor-2, and its role in development and disease.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Developmental Biology

Background:

  • The vascular endothelial growth factor (VEGF) family comprises multiple ligands (VEGF-A to -E, PlGF) with diverse isoforms.
  • VEGF proteins interact with three receptor tyrosine kinases (VEGF receptor-1, -2, -3) and various coreceptors.
  • VEGF signaling is critical for endothelial cell function, angiogenesis, and organ development, with variations based on genetic background.

Purpose of the Study:

  • To review the current understanding of VEGF receptor signal transduction pathways.
  • To highlight the specific role and signaling properties of VEGF receptor-2.
  • To discuss the involvement of VEGF receptors in both normal development and pathological angiogenesis.

Main Methods:

  • Literature review of existing studies on VEGF family, receptors, and signaling pathways.
  • Analysis of gene inactivation studies to determine the in vivo functions of VEGF receptors.
  • Examination of data on receptor-ligand interactions and coreceptor involvement.

Main Results:

  • VEGF receptor-2 mediates endothelial cell survival, migration, differentiation, and vascular permeability.
  • Gene inactivation studies reveal essential roles for VEGF-A and VEGF receptor-2 in embryogenesis, while VEGF receptor-1 and -3 inactivation lead to vascular abnormalities.
  • VEGF receptor-1 appears to have a complex regulatory role, acting negatively on VEGF receptor-2 during embryogenesis but positively in pathological angiogenesis.

Conclusions:

  • VEGF receptors are central regulators of vascular development and function.
  • VEGF receptor-2 is a key mediator of VEGF-A's pro-angiogenic effects.
  • Dysregulation of VEGF signaling contributes to pathological conditions like cancer, underscoring the therapeutic potential of targeting this pathway.

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