Association of aorta intima permeability with myosin light chain kinase expression in hypercholesterolemic rabbits.

Abstract:

:The development of hypercholesterolemia is a multifactorial process in which elevated plasma cholesterol levels play a central role. This study analyzed the variability of the expression and activity of myosin light chain kinase (MLCK) and endothelial permeability in the artery wall of rabbits after feeding the animals with a normal or a high-cholesterol diet. Hypercholesterolemia was induced by a high-cholesterol diet for 4 weeks. Aortas were removed and analyzed for endothelial permeability and MLCK expression. Samples of the arterial media were analyzed for MLCK activity and expression. A selective MLCK inhibitor 1-(5-iodonaphthalene-1-sulfonyl)-1H-hexahydro-1,4-diazepine hydrochloride (ML7) were used in hypercholesterolemia rabbit (1 mg/kg body weight). The aortas of high-cholesterol diet rabbits showed an increase in MLCK expression and activity (nearly threefold compare with control) as well as endothelial permeability. ML7 inhibit MLC phosphorylation and MLCK activity (nearly twofold compare with control) and endothelial permeability stimulated by cholesterol. These results indicate for the first time that hypercholesterolemia may be associated with MLCK expression and activity through which endothelial permeability is increased.

journal_name

Mol Cell Biochem

authors

Zhu HQ,Zhou Q,Jiang ZK,Gui SY,Wang Y

doi

10.1007/s11010-010-0630-3

subject

Has Abstract

pub_date

2011-01-01 00:00:00

pages

209-15

issue

1-2

eissn

0300-8177

issn

1573-4919

journal_volume

347

pub_type

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