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The Journal of Lipid Research, Vol. 39, 2493-2500, December 1998
Copyright © 1998 by Lipid Research, Inc.

Original Article

Dietary fat clearance is modulated by genetic variation in apolipoprotein A-IV gene locus

Correspondence to: Francisco Perez-Jimenez.

Previous studies have shown that the A-IV-347Ser polymorphism is associated with the variability in low density lipoprotein (LDL)-cholesterol response to dietary therapy. The present study was designed to evaluate the association of this polymorphism with the individual variability observed in postprandial lipemic response. This polymorphism was characterized in 50 healthy male subjects homozygous for the apolipoprotein (apo)E3 allele. All subjects were subjected to a vitamin A-fat load test. Blood was drawn at time 0 and every hour over a period of 11 hours. Cholesterol and triglycerides (TG) in plasma and lipoprotein fractions of CH, TG, and retinyl palmitate (RP) were determined. Data from the postprandial lipemia revealed that subjects with the A-IV-347Ser allele (n = 14) have a lower postprandial response in total TG (P < 0.025), large triglyceride rich lipoproteins (TRL) TG (P < 0.02), and small-TRL TG levels (P < 0.007), and a higher postprandial response in large-TRL apoA-IV (P < 0.006) and apoB-100 (P < 0.041) levels than subjects homozygous for the A-IV-347Thr subjects (n = 36).

In conclusion, the modifications observed in postprandial lipoprotein metabolism associated with this polymorphism within the apoA-IV gene locus may be involved in the variability in LDL-CH response observed in subjects consuming high saturated fat diets.—Ostos, M. A., J. Lopez-Miranda, J. M. Ordovas, C. Marin, A. Blanco, P. Castro, F. Lopez-Segura, J. Jimenez-Pereperez, and F. Perez-Jimenez. Dietary fat clearance is modulated by genetic variation in apolipoprotein A-IV gene locus. J. Lipid Res. 1998. 39: 2493–2500.

Supplementary key words: postprandial lipemia, apolipoprotein A-IV, (A-IV-347Ser) polymorphism, triglycerides, retinyl palmitate

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