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Ester percentages of plant sterols and cholesterol in chylomicrons and VLDL of humans with low and high sterol absorption

Authors
Journal
Atherosclerosis
0021-9150
Publisher
Elsevier
Publication Date
Volume
187
Issue
1
Identifiers
DOI: 10.1016/j.atherosclerosis.2005.08.033
Keywords
  • Esterification
  • Chylomicrons
  • Vldl
  • Cholesterol
  • Phytosterols
Disciplines
  • Biology

Abstract

Abstract Ester percentages of cholesterol and non-cholesterol sterols were measured in chylomicrons and very low density lipoproteins (VLDL) in 15 subjects. Our hypothesis was that in humans, in contrast to animal experiments, plant sterols in chylomicrons are esterified similarly to cholesterol. In fact, the mean ester percentage of chylomicron sitosterol (≈40%), but not of campesterol (≈51%), was lower than that of cholesterol (≈54%) in the whole study population. In high cholesterol absorbers (high serum total campesterol, ≥2.8 mmol/mol of cholesterol), the ester percentages of sitosterol and other non-cholesterol sterols were similar to that of cholesterol in chylomicrons, and the percentages tended to be higher than those in low absorbers. In contrast to chylomicrons, the ester percentages of sterols in VLDL tended to be lower in the high than low absorbers. In conclusion, percentages of plant sterol esters are not consistently lower than those of cholesterol in chylomicrons.

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