Journal
ATHEROSCLEROSIS
Volume 193, Issue 2, Pages 361-365Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.atherosclerosis.2006.06.028
Keywords
niacin; adipokines; insulin resistance; endothelial function; inflammation
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Background: The lipid-lowering drug niacin has attracted renewed interest because it raises HDL-cholesterol and because it has recently been found to slow down the progression of intima media thickness in patients with coronary heart disease. Since niacin acts on adipocytes, we investigated its impact on adipokines and on some functions attributed to adipokines. Methods and results: In a randomized, placebo-controlled, double-blind study 30 men with the metabolic syndrome were treated for 6 weeks with 1500 mg extended- release niacin (n = 20) or a placebo (n = 10). Adiponectin increased by 56% (p < 0.001) and leptin by 26.8% p < 0.012). Resistin, TNF-alpha, IL-6, and high sensitive CRP remained unchanged. In spite of the increase in adiponectin there was no improvement in endothelial function. The HOMA index actually deteriorated by 42% (p < 0.0 14). Conclusion.- Short-term treatment with extended-rel ease niacin causes a pronounced increase in adiponectin but fails to improve atheroprotective functions attributed to adiponectin, such as insulin sensitivity, anti- i rill ammation and endothelial function. (c) 2006 Elsevier Ireland Ltd. All rights reserved.
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