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Fatty acid composition of an oral load affects chylomicron size in human subjects.
Br J Nutr. 1997 Jan; 77(1):19-31.BJ

Abstract

HDL-phospholipids are determinants in reverse cholesterol transport. They are mostly derived from triacylglycerol (TG)-rich lipoproteins. Chylomicron size is important, therefore, because it is related to the ratio surface phospholipids: core TG and, thus, determines the availability of postprandial phospholipids for transfer to HDL. Eleven healthy young women each ingested four different fat loads supplemented with retinyl palmitate and containing 60 g sunflower oil (SO), oleic-sunflower oil (OSO), mixed oil (MO; (g/kg) linoleic acid 480, oleic acid 380, linolenic acid 13) or beef tallow (BT). At the peak of TG absorption for all loads (4 h) chylomicron diameters, determined by agarose-gel filtration, were larger after SO compared with OSO (P < 0.05) and BT (P = 0.06) and after MO compared with BT (P < 0.05). At 6 h chylomicron size was larger after the vegetable oils compared with BT (P < 0.05 in each case). After each fat load chylomicron size decreased at 6 and 8 h compared with that at 4 h (P < 0.05) except for OSO. Retinyl ester and TG concentrations were lower in chylomicrons after BT than after the other fats but not in the chylomicron-free serum (containing chylomicron remnants), suggesting absorption in the form of very small particles. Compared with the fasting value, the concentration of the Svedberg unit of flotation 20-400 fraction, which contains VLDL and chylomicron remnants, was lower 8 h after MO, the only fat to contain significant amounts of linolenic acid. We conclude that chylomicron size is dependent on the fatty acid composition of ingested fats and the time-course of digestion, being larger for polyunsaturated fatty acid-rich fats and in the early phase of digestion. On the basis of retinyl ester concentration there were no differences between fats in chylomicron-remnant clearance.

Authors+Show Affiliations

Groupe Lipoprotéines, Faculté de Médecine X. Bichat, Paris, France.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9059227

Citation

Sakr, S W., et al. "Fatty Acid Composition of an Oral Load Affects Chylomicron Size in Human Subjects." The British Journal of Nutrition, vol. 77, no. 1, 1997, pp. 19-31.
Sakr SW, Attia N, Haourigui M, et al. Fatty acid composition of an oral load affects chylomicron size in human subjects. Br J Nutr. 1997;77(1):19-31.
Sakr, S. W., Attia, N., Haourigui, M., Paul, J. L., Soni, T., Vacher, D., & Girard-Globa, A. (1997). Fatty acid composition of an oral load affects chylomicron size in human subjects. The British Journal of Nutrition, 77(1), 19-31.
Sakr SW, et al. Fatty Acid Composition of an Oral Load Affects Chylomicron Size in Human Subjects. Br J Nutr. 1997;77(1):19-31. PubMed PMID: 9059227.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fatty acid composition of an oral load affects chylomicron size in human subjects. AU - Sakr,S W, AU - Attia,N, AU - Haourigui,M, AU - Paul,J L, AU - Soni,T, AU - Vacher,D, AU - Girard-Globa,A, PY - 1997/1/1/pubmed PY - 1997/1/1/medline PY - 1997/1/1/entrez SP - 19 EP - 31 JF - The British journal of nutrition JO - Br J Nutr VL - 77 IS - 1 N2 - HDL-phospholipids are determinants in reverse cholesterol transport. They are mostly derived from triacylglycerol (TG)-rich lipoproteins. Chylomicron size is important, therefore, because it is related to the ratio surface phospholipids: core TG and, thus, determines the availability of postprandial phospholipids for transfer to HDL. Eleven healthy young women each ingested four different fat loads supplemented with retinyl palmitate and containing 60 g sunflower oil (SO), oleic-sunflower oil (OSO), mixed oil (MO; (g/kg) linoleic acid 480, oleic acid 380, linolenic acid 13) or beef tallow (BT). At the peak of TG absorption for all loads (4 h) chylomicron diameters, determined by agarose-gel filtration, were larger after SO compared with OSO (P < 0.05) and BT (P = 0.06) and after MO compared with BT (P < 0.05). At 6 h chylomicron size was larger after the vegetable oils compared with BT (P < 0.05 in each case). After each fat load chylomicron size decreased at 6 and 8 h compared with that at 4 h (P < 0.05) except for OSO. Retinyl ester and TG concentrations were lower in chylomicrons after BT than after the other fats but not in the chylomicron-free serum (containing chylomicron remnants), suggesting absorption in the form of very small particles. Compared with the fasting value, the concentration of the Svedberg unit of flotation 20-400 fraction, which contains VLDL and chylomicron remnants, was lower 8 h after MO, the only fat to contain significant amounts of linolenic acid. We conclude that chylomicron size is dependent on the fatty acid composition of ingested fats and the time-course of digestion, being larger for polyunsaturated fatty acid-rich fats and in the early phase of digestion. On the basis of retinyl ester concentration there were no differences between fats in chylomicron-remnant clearance. SN - 0007-1145 UR - https://www.unboundmedicine.com/medline/citation/9059227/Fatty_acid_composition_of_an_oral_load_affects_chylomicron_size_in_human_subjects_ L2 - https://medlineplus.gov/dietaryfats.html DB - PRIME DP - Unbound Medicine ER -