Different effects of zinc and copper deficiency on composition of plasma high density lipoproteins in rats

M. Lefevre, Carl L Keen, B. Lonnerdal, L. S. Hurley, B. O. Schneeman

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19 Scopus citations

Abstract

Male Sprague-Dawley rats (six per group) were fed an egg white-based diet containing 0 or 5 μg/g Cu with 1, 10, 100 or 1000 μg/g Zn. After 6 wk of feeding, the rats were killed, and the tissues were processed for trace element, lipid and lipoprotein analysis. Copper deficiency was associated with a higher concentration of plasma free cholesterol, high density lipoprotein (HDL) cholesterol and HDL apolipoproteins. Plasma total cholesterol was not significantly affected. No significant differences were noted in HDL lipid composition. However, HDL apo E and apo A-I concentrations were higher with copper deficiency. Lecithin:cholesterol acyltransferase (LCAT) was not affected in a consistent manner by copper status. Varying the amount of zinc in the diet did not produce significant changes in plasma total cholesterol, plasma free cholesterol, HDL cholesterol, or HDL apolipoprotein concentrations. However, HDL from zinc-deficient rats were enriched in free cholesterol and depleted in triglycerides. Furthermore, the concentration of HDL apo C increased as the level of dietary zinc increased.

Original languageEnglish (US)
Pages (from-to)359-368
Number of pages10
JournalJournal of Nutrition
Volume115
Issue number3
StatePublished - 1985

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Food Science

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