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Lipids, Lipoproteins, and Cardiovascular Risk Factors |
1 Department of Internal Medicine and2 Institute of Statistical Science, School of Medicine, University of Messina, Messina, Italy.
aAddress correspondence to this author at: Department of Internal Medicine, Via Camiciotti, 82, 98123 Messina, Italy. Fax 39-090-2213900; e-mail asaitta{at}unime.it.
Background: Atherosclerosis is a complex, chronic disease that usually arises from the converging action of several pathogenic processes, including hypertension, hyperlipidemia, obesity, and the accumulation of oxidized LDL. Platelet-activating factor acetylhydrolase (PAF-AH) is a LDL- and HDL-bound enzyme that hydrolyzes and inactivates PAF and prevents LDL-cholesterol oxidation, thus delaying the onset of atherosclerotic disease.
Methods: We evaluated the relationship between variants of the PAF-AH gene polymorphisms Arg92His, Ile198Thr, and Ala379Val and the presence of carotid atherosclerosis in 190 hypercholesterolemic Sicilian individuals. Carotid artery intima-media wall thickness (IMT) was measured as an indicator of early atherosclerotic disease. The participants were classified according to having normal (
1 mm) or abnormal (
1 mm) IMT and were also investigated for physical characteristics and biochemical indices, including PAF-AH activity.
Results: PAF-AH activity and LDL concentrations were significantly correlated in hypercholesterolemic patients, but plasma PAF-AH activity and HDL were not significantly correlated in either IMT group. No significant differences were detected among the PAF-AH gene polymorphisms in both groups after correction for age, sex, body mass index, plasma glucose and lipid concentrations, PAF-AH activity, blood pressure, and smoking habits. The analysis of PAF-AH genotype distribution showed no significant differences in percentage of 92, 198, and 379 genotypes in both IMT groups.
Conclusion: Our data provided no evidence that PAF-AH polymorphisms influence PAF-AH activity and atherosclerosis in hypercholesterolemic Sicilian patients.
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I. Kardys, H.-H. S. Oei, I. M. van der Meer, A. Hofman, M. M.B. Breteler, and J. C.M. Witteman Lipoprotein-Associated Phospholipase A2 and Measures of Extracoronary Atherosclerosis: The Rotterdam Study Arterioscler. Thromb. Vasc. Biol., March 1, 2006; 26(3): 631 - 636. [Abstract] [Full Text] [PDF] |
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