title: Restriction fragment length polymorphism of the apolipoprotein B gene and response to dietary fat and cholesterol.
abstract: OBJECTIVE
  The relationship between response to dietary fat and cholesterol, and the EcoRI restriction fragment length polymorphism (RFLP) of the apolipoprotein B(apoB) gene was examined.
  
  
  METHODS
  Forty-nine free-living subjects took part in a prospective double-blind crossover dietary intervention study. The apoB EcoRI cutting site was present in five women and 18 men (E+) and absent in 15 women and 11 men (E-).
  
  
  METHODS
  Subjects consumed a low fat (25% energy), low cholesterol (less than 200 mg/day) diet. After two weeks on this background diet (baseline) subjects were randomly assigned to consume a liquid supplement for three weeks which was either fat and cholesterol free or which contained fat (30 to 36 g) and cholesterol (650 to 780 mg). After the first three-week period subjects switched to the other supplement. Blood samples were collected for plasma lipid analysis after an overnight fast on two consecutive days at the end of baseline and on three consecutive days after each three-week supplement period.
  
  
  RESULTS
  There was no significant difference in response to diet between the RFLP groups. Changes in plasma total, low density lipoprotein (LDL), high density lipoprotein(HDL), HDL2 and HDL3 cholesterol or plasma triglyceride were not different between the two RFLP groups. There was a significant difference between RFLP groups for baseline HDL2-cholesterol (0.31 +/- 0.04 and 0.16 +/- 0.02 mmol/L for E- and E+ subjects, respectively) which was independent of sex and apoE genotype (P = 0.032).
  
  
  CONCLUSIONS
  These results indicate that the EcoRI RFLP of the apoB gene is not associated with response to dietary fat and cholesterol.
authors.affiliation: Commonwealth Scientific and Industrial Research Organisation, Division of Human Nutrition, Adelaide, Australia.
authors.forename: M
authors.initials: M
authors.lastname: Abbey
authors.forename: F
authors.initials: F
authors.lastname: Hirata
authors.forename: G Z
authors.initials: GZ
authors.lastname: Chen
authors.forename: R
authors.initials: R
authors.lastname: Ross
authors.forename: M
authors.initials: M
authors.lastname: Noakes
authors.forename: B
authors.initials: B
authors.lastname: Belling
authors.forename: P
authors.initials: P
authors.lastname: Clifton
authors.forename: P J
authors.initials: PJ
authors.lastname: Nestel
mesh_terms: D001055:Apolipoproteins B / Q000097:blood* / Q000235:genetics*; D002791:Cholesterol, Dietary / Q000378:metabolism / Q000494:pharmacology*; D003327:Coronary Disease / Q000097:blood / Q000235:genetics; D018592:Cross-Over Studies; D004041:Dietary Fats / Q000378:metabolism / Q000494:pharmacology*; D004311:Double-Blind Method; D005260:Female; D005838:Genotype; D006801:Humans; D008055:Lipids / Q000097:blood; D008297:Male; D012150:Polymorphism, Restriction Fragment Length; D011446:Prospective Studies
chemical_list: D001055:Apolipoproteins B; D002791:Cholesterol, Dietary; D004041:Dietary Fats; D008055:Lipids