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- W1828153173 abstract "Prickly pear pectin intake decreases plasma LDL concentrations by increasing hepatic apolipoprotein B/E receptor expression in guinea pigs fed a hypercholesterolemic diet. To investigate whether prickly pear pectin has an effect on cholesterol absorption and on enzymes responsible for hepatic cholesterol homeostasis, guinea pigs were fed one of three semipurified diets, each containing 15 g lard/100 g diet: 1) the lard-basal diet with no added cholesterol or prickly pear pectin (LB diet); 2) the LB diet with 0.25 g added cholesterol/100 g diet (LC diet); or 3) the LC diet containing 2.5 g prickly pear pectin/100 g diet, added at the expense of cellulose (LC-P diet). Animals fed the LB diet had the lowest plasma LDL and hepatic cholesterol concentrations, followed by animals fed the LC-P diet (P < 0.001). Hepatic 3-hydroxy-3-methylglutaryl CoA (HMG-CoA) reductase activity was highest in the group fed the LB diet, with similar values for animals in the other two groups. A positive correlation existed between plasma LDL cholesterol concentration and hepatic acyl CoA:cholesterol acyltransferase activity (r = 0.87, P < 0.001). Cholesterol absorption was not different among the three dietary groups. These results indicate that the decreased plasma and hepatic cholesterol concentrations of animals fed prickly pear pectin are not explained by differences in cholesterol absorption but rather are due to mechanisms that alter hepatic cholesterol homeostasis, resulting in lower plasma LDL concentrations." @default.
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- W1828153173 date "1994-06-01" @default.
- W1828153173 modified "2023-10-14" @default.
- W1828153173 title "Prickly Pear (Opuntia sp.) Pectin Alters Hepatic Cholesterol Metabolism without Affecting Cholesterol Absorption in Guinea Pigs Fed a Hypercholesterolemic Diet," @default.
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- W1828153173 doi "https://doi.org/10.1093/jn/124.6.817" @default.
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