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Current Vascular Pharmacology


ISSN (Print): 1570-1611
ISSN (Online): 1875-6212

Endothelin-1-Induced Signaling Pathways in Vascular Smooth Muscle Cells

Author(s): Ali Bouallegue, Grace Bou Daou and Ashok K. Srivastava

Volume 5 , Issue 1 , 2007

Page: [45 - 52] Pages: 8

DOI: 10.2174/157016107779317161

Price: $58


Endothelin-1 (ET-1), a vasoactive peptide, is believed to contribute to the pathogenesis of vascular abnormalities such as hypertension, atherosclerosis, hypertrophy and restenosis. ET-1 elicits its biological effects through the activation of two receptor subtypes, ET-A and ET-B that belong to a large family of transmembrane guanine nucleotide-binding protein-coupled receptors (GPCRs). ET-1 receptor activation results in the stimulation of several signaling pathways including mitogen-activated protein kinases (MAPKs), phosphatidylinositol 3-kinase (PI3-K) and protein kinase B (PKB). An intermediary role of Ca2+/calmodulin-dependent protein kinases (CaMK), protein kinase C (PKC) as well as receptor and non-receptor protein tyrosine kinases in triggering the activation of MAPK and PI3-K/PKB signaling in response to ET-1 has been suggested. Activation of these pathways by ET-1 is intimately linked with the regulation of cellular hypertrophy, growth, proliferation and cell survival. Here we provide an overview of these signaling pathways in vascular smooth muscle cells (VSMCs) with an emphasis on their potential role in vascular pathophysiology.

Keywords: Endothelin-1, vascular smooth muscle cells, MAPKs, PKB/Akt, PI3-K, PKC, vascular diseases

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