کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8477080 1550877 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oleic and linoleic fatty acids downregulate Slc2a4/GLUT4 expression via NFKB and SREBP1 in skeletal muscle cells
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
Oleic and linoleic fatty acids downregulate Slc2a4/GLUT4 expression via NFKB and SREBP1 in skeletal muscle cells
چکیده انگلیسی
Oleic (OA) and linoleic (LA) fatty acids may be important regulators of Slc2a4 gene (GLUT4 protein) in skeletal muscle, thus participating in insulin resistance. We investigated the effect of OA and LA on the Slc2a4/GLUT4 expression in L6 muscle cells; as well as potential transcriptional regulators. OA and LA (50-400 µM) decreased the Slc2a4/GLUT4 expression in a dose-dependent way (maximum of ~50%, P < 0.001). OA and LA did not alter the Slc2a4-binding activity of oxysterols-receptor-LXR-alpha and peroxisome-proliferator-activated-receptor-gamma; but decreased the Slc2a4-binding activity of the sterol-regulatory-element-binding-protein-1 (SREBP1) enhancer (50%, P < 0.001), and increased (~30%, P < 0.001) the nuclear proteins binding into the Slc2a4-nuclear-factor-NF-kappa-B-binding site (repressor), and the phosphorylation of the inhibitors of nuclear-factor-kappa-B-kinase alpha/beta (150-300%, P < 0.001). In sum, OA and LA are potent inhibitors of the Slc2a4/GLUT4 expression in muscle cells; an effect involving reduced SREBP1 and increased NFKB transcriptional activity. These regulations may participate in the fatty acid-related pathophysiology of insulin resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular and Cellular Endocrinology - Volume 401, 5 February 2015, Pages 65-72
نویسندگان
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