Title : Effects of genotype and diet on cholesterol efflux into plasma and lipoproteins of normal, apolipoprotein A-I-, and apolipoprotein E-deficient mice.

Pub. Date : 1997 Oct

PMID : 9351366






11 Functional Relationships(s)
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1 We investigated the contribution of apoE to cholesterol efflux into plasmas of normal, apoA-I-, and apoE-deficient mice, which were fed with chow- and cholesterol-rich diets. Cholesterol apolipoprotein E Mus musculus
2 When apoA-I- and apoE-deficient mice received both chow- and fat-rich diets, their plasmas released significantly less 3H-cholesterol from radiolabeled fibroblasts than did plasma of normal mice. Cholesterol apolipoprotein E Mus musculus
3 Removal of apoE from plasmas of normal and apoA-I-deficient mice by anti-apoE immunoaffinity chromatography decreased their cholesterol efflux capacities (per 1 minute/per 1 hour) by 26%/40% (P = 0.0092/0.0007) and 30%/26% (P = 0.0092/0.0003), respectively. Cholesterol apolipoprotein E Mus musculus
4 Removal of apoE from plasmas of normal and apoA-I-deficient mice by anti-apoE immunoaffinity chromatography decreased their cholesterol efflux capacities (per 1 minute/per 1 hour) by 26%/40% (P = 0.0092/0.0007) and 30%/26% (P = 0.0092/0.0003), respectively. Cholesterol apolipoprotein E Mus musculus
5 Incubation of fibroblasts with apoE-deficient plasma caused net influx of cholesterol. Cholesterol apolipoprotein E Mus musculus
6 Some of the differences between cholesterol efflux into normal and apoE-deficient plasmas were attributable to the failure of apoE-deficient plasmas to take up cell-derived 3H-cholesterol into gamma-LpE. Cholesterol apolipoprotein E Mus musculus
7 Compared with normal plasma, both apoA-I-deficient and apoE-deficient plasmas were significantly decreased in their activity to esterify cell-derived 3H-cholesterol. Cholesterol apolipoprotein E Mus musculus
8 Anti-apoE chromatography decreased significantly cholesterol esterification in normal plasma and apoA-I-deficient plasma but not in apoE-deficient plasma. Cholesterol apolipoprotein E Mus musculus
9 Taken together, the data provide evidence that apoE is an important contributor to reverse cholesterol transport, partially because of initial uptake of cell-derived cholesterol by gamma-LpE and partially because of the contribution of apoE-containing lipoproteins to esterification of cholesterol in plasma. Cholesterol apolipoprotein E Mus musculus
10 Taken together, the data provide evidence that apoE is an important contributor to reverse cholesterol transport, partially because of initial uptake of cell-derived cholesterol by gamma-LpE and partially because of the contribution of apoE-containing lipoproteins to esterification of cholesterol in plasma. Cholesterol apolipoprotein E Mus musculus
11 Taken together, the data provide evidence that apoE is an important contributor to reverse cholesterol transport, partially because of initial uptake of cell-derived cholesterol by gamma-LpE and partially because of the contribution of apoE-containing lipoproteins to esterification of cholesterol in plasma. Cholesterol apolipoprotein E Mus musculus