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Published on: October 12, 2017
Lectin-like oxidized-LDL receptor-1 (LOX-1) polymorphisms influence cardiovascular events rate during statin
L Puccetti1, A L Pasqui, F Bruni
1Department of Clinical Medicine and Immunology, Internal Medicine Division, Center for Atherosclerosis Research, Policlinico Le Scotte, University of Siena, V.le Bracci, 53100, Siena, Italy. puccetti@unisi.it
Background:
Oxidized-LDL (ox-LDL) are involved in atherothrombosis by induction of endothelial dysfunction and thrombosis. The specific receptor lectin-like oxidized-LDL receptor-1 (LOX-1) is expressed in endothelial cells, monocytes and platelets. LOX-1 gene allelic variants (3'UTR/T) have been related with cardiovascular events and reduced anti-platelet activity induced by statins.
Objectives:
To detect whether LOX-1 polymorphisms could affect statins effectiveness in cardiovascular prevention.
Patients/Methods:
The present was a retrospective study performed in 751 white hypercholesterolemic subjects treated with increasing doses of atorvastatin (n=382, 247 male, 135 female) or simvastatin (n=369, 244 male, 125 female) up to 4 years, whose LDL target was 3.36 mmol/L according to the National Cholesterol Education Program, Adult Treatment Panel III (NCEP-ATPIII). Single nucleotide polymorphism were evaluated by allelic discrimination assays (PCR), lipid profile by enzymatic-colorimetric methods and C-reactive protein (CRP) by a nephelometric technique.
Results:
Twenty-three non-ST elevation (NSTEMI) and eleven ST-elevation myocardial infarction (STEMI) were encountered in the observational period without differences between treatments (p=0.175) and sex (p=0.139). Each symptomatic subject (10 reaching the appropriate LDL target and 24 with still undesirable LDL) had the 3'UTR/T allelic variant (adjusted O.R. 4.63, 95% C.I. 3.46-6.70, p<0.0001). Among patients not reaching LDL target the C allele resulted protective with respect to T carriers (p<0.00001). Also, similar changes of CRP resulted in different event rate between T and C carriers (p<0.001) in the whole cohort.
Conclusions:
In the studied population LOX-1 genetic variants influence cardiovascular risk reduction induced by statins also in patients not reaching the LDL target. The previously described LOX-1-related antithrombotic actions of both statins employed could have a specific role in what observed, suggesting a genetic influence in statins LDL-lowering partially related actions.
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