Relationship between sensitivity to dietary fat and dietary cholesterol.
A group of 56 hypercholesterolemic and normocholesterolemic men and women were given approximately 700 mg a day of egg yolk cholesterol in a double-blind, crossover study while they were on a background diet containing approximately 30% of energy as fat. Overall there was a 0.23 mmol/l rise in plasma cholesterol (3.7%, p less than 0.001) after 4 weeks, a 0.19 mmol/l rise in low density lipoprotein (LDL) cholesterol (4.9%, p = 0.002), and a 0.07 mmol/l rise in high density lipoprotein (HDL) cholesterol (5.4%, p less than 0.001). Plasma triglycerides fell by 0.07 mmol/l (5.1%). Normocholesterolemic individuals (plasma cholesterol less than 5.2 mmol/l) experienced small, nonsignificant rises of 0.06, 0.02, and 0.05 mmol/l in total, LDL, and HDL cholesterol, respectively. Hypercholesterolemic subjects were classified on the basis of their response to a low fat diet. Diet-sensitive subjects were defined by a greater than 10% fall in plasma cholesterol on a 25% fat, low cholesterol (less than 200 mg/day) diet. These individuals were found to be more responsive to the effect of dietary cholesterol than were diet-insensitive subjects; the respective changes in the two groups were rises of 0.36 mmol/l versus 0.19 mmol/l in plasma cholesterol (p = 0.06) and rises of 0.30 versus 0.15 mmol/l in LDL cholesterol (p = 0.06). In addition to elevating HDL cholesterol by 0.09 mmol/l and 0.07 mmol/l, respectively, dietary cholesterol also produced an increase in the proportion of HDL2, from 40% to 44% of HDL protein (p less than 0.001).(ABSTRACT TRUNCATED AT 250 WORDS)
Clifton
P M
PM
CSIRO Division of Human Nutrition, Adelaide, South Australia.
Kestin
M
M
Abbey
M
M
Drysdale
M
M
Nestel
P J
PJ
D001057:Apolipoproteins E / Q000235:genetics; D002784:Cholesterol / Q000097:blood; D002791:Cholesterol, Dietary / Q000494:pharmacology*; D004032:Diet; D004041:Dietary Fats / Q000494:pharmacology*; D005260:Female; D006801:Humans; D006937:Hypercholesterolemia / Q000097:blood / Q000235:genetics; D008075:Lipoproteins, HDL / Q000097:blood; D008297:Male; D010316:Particle Size; D010641:Phenotype; D012016:Reference Values
D001057:Apolipoproteins E; D002791:Cholesterol, Dietary; D004041:Dietary Fats; D008075:Lipoproteins, HDL; D002784:Cholesterol