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Soluble guanylyl cyclase activation promotes angiogenesis
Anastasia Pyriochou1, Dimitris Beis, Vasiliki Koika
1Laboratory of Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras 26504, Greece.
The Journal of Pharmacology and Experimental Therapeutics
|August 31, 2006
Summary
Soluble guanylyl cyclase (sGC) activation promotes endothelial cell proliferation, migration, and network formation, suggesting it is a novel target for modulating neovascularization.
Area of Science:
- * Molecular biology and cell signaling
- * Vascular biology and angiogenesis
Background:
- * Soluble guanylyl cyclase (sGC) is a nitric oxide (NO) sensor enzyme.
- * Its role in vascular endothelium and angiogenesis is largely unexplored.
- * sGC is present in various cell types, including endothelial cells (EC).
Purpose of the Study:
- * To investigate the role of sGC in angiogenesis and EC properties.
- * To explore sGC's involvement in neovascularization and vascular development.
- * To identify downstream signaling pathways regulated by sGC in EC.
Main Methods:
- * Enzymatic activity assays in chicken chorioallantoic membrane (CAM).
- * In vivo studies using zebrafish for vascular development.
- * In vitro experiments with EC proliferation, migration, and network formation assays.
- * Pharmacological modulation and gene transfer of sGC.
- * Analysis of MAPK signaling pathways (ERK1/2, p38).
Main Results:
- * sGC is active during angiogenesis in CAM; inhibition reduces neovascularization, activation promotes it.
- * sGC blockade affects angiogenic responses in zebrafish cranial and intersegmental vessels.
- * sGC activation enhances EC proliferation and migration; inhibition blocks network formation and VEGF-induced migration.
- * sGC activation upregulates ERK1/2 and p38 MAPK, which are downstream effectors mediating EC migration.
Conclusions:
- * sGC activation promotes angiogenesis-related properties in endothelial cells.
- * sGC signaling pathways, particularly involving p38 MAPK, are crucial for EC migration.
- * sGC represents a potential therapeutic target for modulating neovascularization.
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