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Lack of an endothelial store-operated Ca2+ current impairs agonist-dependent vasorelaxation in TRP4−/− mice
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Lack of an endothelial store-operated Ca2+ current impairs agonist-dependent vasorelaxation in TRP4−/− mice
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Lack of an endothelial store-operated Ca2+ current impairs agonist-dependent vasorelaxation in TRP4−/− mice
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Journal Article
Lack of an endothelial store-operated Ca2+ current impairs agonist-dependent vasorelaxation in TRP4−/− mice
2001
Overview
Agonist-induced Ca
2+
entry into cells by both store-operated channels and channels activated independently of Ca
2+
-store depletion has been described in various cell types. The molecular structures of these channels are unknown as is, in most cases, their impact on various cellular functions. Here we describe a store-operated Ca
2+
current in vascular endothelium and show that endothelial cells of mice deficient in TRP4 (also known as CCE1) lack this current. As a consequence, agonist-induced Ca
2+
entry and vasorelaxation is reduced markedly, showing that TRP4 is an indispensable component of store-operated channels in native endothelial cells and that these channels directly provide an Ca
2+
-entry pathway essentially contributing to the regulation of blood vessel tone.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ Animals
/ Biomedical and Life Sciences
/ Calcium Channels - physiology
/ Chelating Agents - pharmacology
/ Egtazic Acid - analogs & derivatives
/ Endothelium, Vascular - cytology
/ Endothelium, Vascular - metabolism
/ Enzyme Inhibitors - pharmacology
/ Female
/ Hydroquinones - pharmacology
/ Inositol 1,4,5-Trisphosphate - pharmacology
/ Male
/ Mice
