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Carvedilol suppresses fatty acid oxidation and stimulates glycolysis in C2C12 cells

Canadian Journal of Physiology and Pharmacology, ISSN: 0008-4212, Vol: 90, Issue: 8, Page: 1087-1093
2012
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Carvedilol suppresses fatty acid oxidation and stimulates glycolysisin C2C12 cells

Introduction Beta adrenergic receptor antagonists ([beta]-blockers) are the mainstay in the treatment of many cardiovascular diseases such as hypertension, ischemic heart disease, arrhythmia, and heart

Article Description

Beta adrenergic receptor blocking drugs (β-blockers) are used chronically in many cardiovascular diseases such as hypertension, ischemic heart disease, arrhythmia, and heart failure. Beneficial effects are associated with the inhibition of symphathetic nervous system hyperactivity, reduction of heart rate, and remodeling by blocking the mitogenic activity of catecholamines. A possible effect of β-blockers on substrate metabolism has also been suggested. The direct effects of β-blockers on mouse C2C12 cells were investigated in this study. C2C12 cells were grown in Dulbecco's modified Eagle's medium (DMEM) supplemented with 10% fetal bovine serum (FBS) and differentiated into myotubes in the same medium that contained 1% FBS. Palmitic acid oxidation and glycolysis were measured by using [9,10-]palmitate and [5-H]glucose, respectively. The amount of HO was measured as an indicator of substrate usage. Carvedilol (100 μmol/L) inhibited palmitate oxidation and increased glycolysis by nearly 50%. Prazosin altered substrate metabolism in a similar fashion as carvedilol, whereas propranolol or bisoprolol were devoid of metabolic effects. When added to mimic sympathetic activation, epinephrine stimulated glycolysis but did not alter fatty acid oxidation. Based on these results, carvedilol appears to have direct effects on substrate metabolism that are related to the blockade of α1 adrenergic receptors.

Bibliographic Details

Onay-Besikci, Arzu; Suzmecelik, Elif; Ozcelikay, A Tanju

Canadian Science Publishing

Biochemistry, Genetics and Molecular Biology; Pharmacology, Toxicology and Pharmaceutics; Medicine

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