Interaction between a CSK Gene Variant and Fish Oil Intake Influences Blood Pressure in Healthy Adults

被引:17
作者
AlSaleh, Aseel [1 ]
Maniou, Zoitsa [1 ]
Lewis, Fiona J. [1 ]
Hall, Wendy L. [1 ]
Sanders, Thomas A. B. [1 ]
O'Dell, Sandra D. [1 ]
机构
[1] Kings Coll London, Sch Med, Diabet & Nutr Sci Div, London, England
关键词
GENOME-WIDE ASSOCIATION; CARDIOVASCULAR-DISEASE RISK; POLYUNSATURATED FATTY-ACIDS; CONTROLLED-TRIALS; CYP1A2; GENOTYPE; ANGIOTENSIN-II; HYPERTENSION; LOCI; SUPPLEMENTATION; METAANALYSIS;
D O I
10.3945/jn.113.185108
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
Blood pressure is a heritable determinant of cardiovascular disease (CVD) risk. Recent genome-wide association studies have identified several single-nucleotide polymorphisms (SNPs) associated with blood pressure, including rs1378942 in the c-Src tyrosine kinase (CSK) gene. Fish oil supplementation provides inconsistent protection from CVD, which may reflect genetic variation. We investigated the effect of rs1378942 genotype interaction with fish oil dosage on blood pressure measurements in the MARINA (Modulation of Atherosclerosis Risk by Increasing doses of N-3 fatty Acids) study, a parallel, double-blind, controlled trial in 367 participants randomly assigned to receive treatment with 0.45, 0.9, and 1.8 g/d eicosapentaenoic acid [EPA (20:5n-3)] and docosahexaenoic acid [DHA (22.6n-3)] (1.51:1) or an olive oil placebo for 12 mo. A total of 310 participants were genotyped. There were no significant associations with blood pressure measures at baseline; however, the interaction between genotype and treatment was a significant determinant of systolic blood pressure (SBP) (P = 0.010), diastolic blood pressure (DBP) (P = 0.037), and mean arterial blood pressure (MABP) (P = 0.014). After the 1.8 g/d dose, noncarriers of the rs1378942 variant allele showed significantly lower SBP (P = 0.010), DB P (P = 0.016), and MABP (P = 0.032) at follow-up, adjusted for baseline values, than did carriers. We found no evidence of SNP genotype association with endothelial function (brachial artery diameter and flow-mediated dilatation), arterial stiffness (carotid-femoral pulse wave velocity and digital volume pulse), and resting heart rate. A high intake of EPA and DHA could help protect noncarriers but not carriers of the risk allele. Dietary recommendations to reduce blood pressure in the general population may not necessarily benefit those most at risk. This trial was registered at controlled-trials.com as ISRCTN66664610.
引用
收藏
页码:267 / 272
页数:6
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