Smooth Muscle Cholesterol Enables BK β1 Subunit-Mediated Channel Inhibition and Subsequent Vasoconstriction Evoked by Alcohol
Author(s) -
An. Bukiya,
Thirumalini Vaithianathan,
Guruprasad Kuntamallappanavar,
Maria AsuncionChin,
Alex M. Dopico
Publication year - 2011
Publication title -
arteriosclerosis thrombosis and vascular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.007
H-Index - 270
eISSN - 1524-4636
pISSN - 1079-5642
DOI - 10.1161/atvbaha.111.233965
Subject(s) - bk channel , vascular smooth muscle , vasoconstriction , cerebral arteries , medicine , cholesterol , endocrinology , chemistry , potassium channel , pinacidil , knockout mouse , biology , smooth muscle , glibenclamide , diabetes mellitus , receptor
Hypercholesterolemia and alcohol drinking constitute independent risk factors for cerebrovascular disease. Alcohol constricts cerebral arteries in several species, including humans. This action results from inhibition of voltage- and calcium-gated potassium channels (BK) in vascular smooth muscle cells (VSMC). BK activity is also modulated by membrane cholesterol. We investigated whether VSMC cholesterol regulates ethanol actions on BK and cerebral arteries.
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