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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
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.
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.