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Nerve growth factor activates aorta endothelial cells causing PI3K/Akt- and ERK-dependent migration
Ulrik L Rahbek1, Steen Dissing, Camilla Thomassen
1Department of Medical Physiology, The Panum Institute, University of Copenhagen, Blegdamsvej 3, 2200 Copenhagen N, Denmark.
Pflugers Archiv : European Journal of Physiology
|June 1, 2005
Summary
Nerve growth factor (NGF) activates endothelial cell migration and signaling pathways crucial for angiogenesis. This neurotrophin promotes cell movement and morphological changes, highlighting its role in blood vessel formation.
Area of Science:
- Endothelial cell biology
- Neurotrophin signaling
- Angiogenesis research
Background:
- Nerve growth factor (NGF) is a key neurotrophin.
- Endothelial cells are critical for blood vessel formation (angiogenesis).
Purpose of the Study:
- To investigate the role of NGF in endothelial cell migration and signaling.
- To determine if NGF can activate angiogenic processes.
Main Methods:
- Assessed expression of TrkA and p75NTR receptors in aorta endothelial cells.
- Utilized pig aortic endothelial cells in an NGF gradient to observe migration.
- Analyzed activation of phosphatidylinositol 3-kinase (PI3K) and extracellular signal-regulated kinase (ERK) pathways.
- Examined morphological changes in migrating endothelial cells.
Main Results:
- Endothelial cells express both TrkA and p75NTR receptors.
- NGF induced migration of pig aortic endothelial cells.
- NGF activated PI3K and ERK signaling pathways simultaneously.
- Migrating cells exhibited elongated structures and reduced cell volume.
Conclusions:
- NGF acts as an activator of endothelial cells.
- NGF signaling through TrkA and p75NTR contributes to endothelial cell migration.
- NGF plays a significant role in mediating angiogenesis.