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Papers In Press, published online ahead of print October 16, 2003
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Department of Clinical Experimental Medicine, University of Verona, Verona 37134
Corresponding Author: oliviero.olivieri{at}univr.it
Apolipoprotein C-III is a marker of (TG) -rich lipoproteins, which are often increased in metabolic syndrome (MS). The T455C polymorphism in the insulin responsive element region of APOC3 gene influences TG and apo C-III levels. The aim of the present study was to evaluate the contribution of apo C-III levels and T-455C polymorphism in affecting coronary artery disease (CAD) risk in MS patients. We studied 873 patients, 549 with angiographically documented CAD, and 251 with normal coronary arteries. Patients were classified also for having or not the metabolic syndrome (MS, n=270; MS-free, n=603) according to well established criteria. Lipids, insulin, apolipoproteins levels as well as the APOC3 T455C genotypes were evaluated. Apo C-III levels were significantly increased in MS patients and the probability of having MS was correlated with increasing quartiles of apo C-III levels. Moreover, MS patients with CAD had significantly higher apo C-III levels than CAD-free MS patients. The carriership for 455C variant multiplied the probability of CAD in MS, in allele-specific way, and was associated with increased apo C-III and TG levels. Obesity was less frequent in MS carriers of the 455C allele than in MS non carriers (21.6% vs. 34.8%, p<0.05). In conclusion, APOC3 polymorphism has a relevant impact on CAD risk of MS patents, thus suggesting a role for apo C-III-rich lipoproteins metabolism in the pathophysiology of cardiovascular disease.
Revised on September 3, 2003
Accepted on October 10, 2003
Apolipoprotein C-III, metabolic syndrome and risk of coronary artery disease
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