title: Association of the sirtuin and mitochondrial uncoupling protein genes with carotid plaque.
abstract: OBJECTIVE
  Sirtuins (SIRTs) and mitochondrial uncoupling proteins (UCPs) have been implicated in cardiovascular diseases through the control of reactive oxygen species production. This study sought to investigate the association between genetic variants in the SIRT and UCP genes and carotid plaque.
  
  
  METHODS
  In a group of 1018 stroke-free subjects from the Northern Manhattan Study with high-definition carotid ultrasonography and genotyping, we investigated the associations of 85 single nucleotide polymorphisms (SNPs) in the 11 SIRT and UCP genes with the presence and number of carotid plaques, and evaluated interactions of SNPs with sex, smoking, diabetes and hypertension as well as interactions between SNPs significantly associated with carotid plaque.
  
  
  RESULTS
  Overall, 60% of subjects had carotid plaques. After adjustment for demographic and vascular risk factors, T-carriers of the SIRT6 SNP rs107251 had an increased risk for carotid plaque (odds ratio, OR = 1.71, 95% CI = 1.23-2.37, Bonferroni-corrected p = 0.03) and for a number of plaques (rate ratio, RR = 1.31, 1.18-1.45, Bonferroni-corrected p = 1.4×10(-5)), whereas T-carriers of the UCP5 SNP rs5977238 had an decreased risk for carotid plaque (OR = 0.49, 95% CI = 0.32-0.74, Bonferroni-corrected p = 0.02) and plaque number (RR = 0.64, 95% CI = 0.52-0.78, Bonferroni-corrected p = 4.9×10(-4)). Some interactions with a nominal p≤0.01 were found between sex and SNPs in the UCP1 and UCP3 gene; between smoking, diabetes, hypertension and SNPs in UCP5 and SIRT5; and between SNPs in the UCP5 gene and the UCP1, SIRT1, SIRT3, SIRT5, and SIRT6 genes in association with plaque phenotypes.
  
  
  CONCLUSIONS
  We observed significant associations between genetic variants in the SIRT6 and UCP5 genes and atherosclerotic plaque. We also found potential effect modifications by sex, smoking and vascular risk factors of the SIRT/UCP genes in the associations with atherosclerotic plaque. Further studies are needed to validate our observations.
authors.affiliation: Department of Neurology, Miller School of Medicine, University of Miami, Miami, Florida, United States of America.
authors.forename: Chuanhui
authors.initials: C
authors.lastname: Dong
authors.forename: David
authors.initials: D
authors.lastname: Della-Morte
authors.forename: Liyong
authors.initials: L
authors.lastname: Wang
authors.forename: Digna
authors.initials: D
authors.lastname: Cabral
authors.forename: Ashley
authors.initials: A
authors.lastname: Beecham
authors.forename: Mark S
authors.initials: MS
authors.lastname: McClendon
authors.forename: Corneliu C
authors.initials: CC
authors.lastname: Luca
authors.forename: Susan H
authors.initials: SH
authors.lastname: Blanton
authors.forename: Ralph L
authors.initials: RL
authors.lastname: Sacco
authors.forename: Tatjana
authors.initials: T
authors.lastname: Rundek
mesh_terms: D002340:Carotid Artery Diseases / Q000453:epidemiology / Q000235:genetics*; D020022:Genetic Predisposition to Disease; D006801:Humans; D007473:Ion Channels / Q000235:genetics*; D026901:Membrane Transport Proteins / Q000235:genetics*; D024101:Mitochondrial Proteins / Q000235:genetics*; D000071245:Mitochondrial Uncoupling Proteins; D009419:Nerve Tissue Proteins / Q000235:genetics*; D058226:Plaque, Atherosclerotic / Q000453:epidemiology / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D012307:Risk Factors; D037761:Sirtuins / Q000235:genetics*; D000071256:Uncoupling Protein 1
chemical_list: D007473:Ion Channels; D026901:Membrane Transport Proteins; D024101:Mitochondrial Proteins; D000071245:Mitochondrial Uncoupling Proteins; D009419:Nerve Tissue Proteins; C116584:SLC25A14 protein, human; C000604371:UCP1 protein, human; D000071256:Uncoupling Protein 1; C516592:SIRT6 protein, human; D037761:Sirtuins
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