BACKGROUND: The purpose of this study was to investigate the effect of differences in cholesterol absorption efficiency on the postprandial lipemia and lipoprotein composition. METHODS: Fifteen healthy subjects were divided into low and high cholesterol absorbers on the basis of serum cholestanol to cholesterol ratio. A high-performance liquid chromatographic method with evaporative light scattering detection was developed for quantitation of free and esterified cholesterol, triglycerides and major phospholipids from the same lipid extract in two runs utilizing the same internal standard. RESULTS: The free cholesterol to phosphatidylcholine ratio of chylomicrons was higher in the high cholesterol absorption group. The total increase of cholesterol in combined chylomicron and very low density lipoprotein (VLDL) fraction was also higher in this group. Chylomicron free cholesterol and cholesterol ester responses correlated with fasting low density lipoprotein (LDL) cholesterol. VLDL and VLDL1 triglyceride responses correlated inversely with fasting insulin and homeostasis model assessment of insulin resistance. CONCLUSIONS: High cholesterol absorption efficiency was seen in chylomicrons as higher cholesterol to phosphatidylcholine ratio during the postprandial peak. Chylomicron cholesterol response was linked to fasting LDL cholesterol and low VLDL triglyceride response to fasting insulin.
BACKGROUND: The purpose of this study was to investigate the effect of differences in cholesterol absorption efficiency on the postprandial lipemia and lipoprotein composition. METHODS: Fifteen healthy subjects were divided into low and high cholesterol absorbers on the basis of serum cholestanol to cholesterol ratio. A high-performance liquid chromatographic method with evaporative light scattering detection was developed for quantitation of free and esterified cholesterol, triglycerides and major phospholipids from the same lipid extract in two runs utilizing the same internal standard. RESULTS: The free cholesterol to phosphatidylcholine ratio of chylomicrons was higher in the high cholesterol absorption group. The total increase of cholesterol in combined chylomicron and very low density lipoprotein (VLDL) fraction was also higher in this group. Chylomicron free cholesterol and cholesterol ester responses correlated with fasting low density lipoprotein (LDL) cholesterol. VLDL and VLDL1 triglyceride responses correlated inversely with fasting insulin and homeostasis model assessment of insulin resistance. CONCLUSIONS: High cholesterol absorption efficiency was seen in chylomicrons as higher cholesterol to phosphatidylcholine ratio during the postprandial peak. Chylomicron cholesterol response was linked to fasting LDL cholesterol and low VLDL triglyceride response to fasting insulin.
Authors: Guilherme M Puga; Christian Meyer; Sarah Everman; Lawrence J Mandarino; Christos S Katsanos Journal: Am J Physiol Endocrinol Metab Date: 2011-05-10 Impact factor: 4.310
Authors: Maxine P Bonham; Kaisa M Linderborg; Aimee Dordevic; Amy E Larsen; Kay Nguo; Jacquelyn M Weir; Petra Gran; Marika K Luotonen; Peter J Meikle; David Cameron-Smith; Heikki P T Kallio; Andrew J Sinclair Journal: Lipids Date: 2012-11-03 Impact factor: 1.880
Authors: Ursula Schwab; Tuulikki Seppänen-Laakso; Laxman Yetukuri; Jyrki Agren; Marjukka Kolehmainen; David E Laaksonen; Anna-Liisa Ruskeepää; Helena Gylling; Matti Uusitupa; Matej Oresic Journal: PLoS One Date: 2008-07-09 Impact factor: 3.240