title: Dietary n-3 polyunsaturated fatty acid intakes modify the effect of genetic variation in fatty acid desaturase 1 on coronary artery disease.
abstract: BACKGROUND
  Previous studies suggested that dietary fatty acids could affect blood lipids by interacting with genetic variations in fatty acid desaturase 1 (FADS1). However, little is known about their direct effects on coronary artery disease (CAD). The aim of this study was to evaluate whether dietary n-3 long-chain polyunsaturated fatty acids (LCPUFAs)-eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) could modulate the effect of FADS1 rs174547 polymorphism on CAD.
  
  
  METHODS
  FADS1 single-nucleotide polymorphisms rs174547 genotypes were measured in 440 CAD patients and 838 healthy controls. Dietary EPA and DHA intakes were assessed with a validated quantitative frequency food questionnaire. The association between FADS1 rs174547 and CAD was estimated using logistic regression under both dominant and additive genetic models. The interactions between rs174547 polymorphism and LCPUFAs were analyzed by using multiple logistic regression and the "genotype × n-3 LCPUFAs" interaction term was included into the model.
  
  
  RESULTS
  We found that the minor T allele of FADS1 rs174547 increased CAD risk (OR = 1.36, 95%CIs 1.03-1.80), and observed significant interaction between rs174547 and dietary EPA intakes on CAD (P-interaction = 0.028). The T-allele was only associated with higher CAD risk among individuals with lower dietary EPA intakes, but not in those with higher EPA intakes. Similarly, significant interaction was also observed between rs174547 and dietary DHA intakes on CAD (P-interaction = 0.020).
  
  
  CONCLUSIONS
  Dietary n-3 LCPUFA intakes could modulate the association between FADS1 rs174547 polymorphism and CAD. High dietary n-3 LCPUFA intakes could negate the unfavorable effect of genetic variation in FADS1 on CAD in middle-aged and elderly Chinese population.
authors: Department of Epidemiology and health statistics, School of Public Health, Fujian Medical University, Fuzhou, Fujian, China.
authors: Fengqiong
authors: F
authors: Liu
authors: Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China.
authors: Zhongxia
authors: Z
authors: Li
authors: Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China.
authors: Xiaofei
authors: X
authors: Lv
authors: Department of Nutrition, School of Public Health, Sun Yat-Sen University, Guangzhou, Guangdong, China.
authors: Jing
authors: J
authors: Ma
mesh_terms: D000368:Aged; D044466:Asian People; D002681:China; D003324:Coronary Artery Disease / Q000097:blood / Q000235:genetics; D000090943:Delta-5 Fatty Acid Desaturase; D019587:Dietary Supplements; D004281:Docosahexaenoic Acids / Q000008:administration & dosage / Q000493:pharmacokinetics; D015118:Eicosapentaenoic Acid / Q000008:administration & dosage / Q000493:pharmacokinetics; D044943:Fatty Acid Desaturases / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide
chemical_list: D000090943:Delta-5 Fatty Acid Desaturase; D004281:Docosahexaenoic Acids; D015118:Eicosapentaenoic Acid; D044943:Fatty Acid Desaturases; C000716847:FADS1 protein, human