The relation between lipoprotein(a) [Lp(a)], apolipoprotein (apo) E phenotypes, cholesterol, triglycerides, apo A-I, apo B, and a family history of atherosclerosis or risk factors was studied in 2- and 4-year-old French Caucasian children (n = 499). Lp(a) concentrations were distributed in a typical skewed manner and were found to be an independent lipid variable. The distribution of apo E phen...

The relationship between apolipoprotein E4 (Apo E4) and the occurrence of Alzheimer’s Disease is well known; however, the biochemical mechanism behind this association is not well characterized. This research project examines the potential differences in mercury binding between free Apo E2 and Apo E4 isoforms. An equilibrium dialysis chamber is used to monitor the movement and binding of mercur...

Beta very low density lipoproteins (beta-VLDL) from cholesterol-fed animals from patients with Type III hyperlipoproteinemia are internalized by a receptor-mediated process in mouse macrophages. Once internalized, the cholesteryl esters of beta-VLDL are hydrolyzed in lysosomes, and the released cholesterol is re-esterified, resulting in a massive accumulation of cholesteryl esters. In the prese...

Beta very low density lipoproteins (B-VLDL) from cholesterol-fed animals and from patients with Type III hyperlipoproteinemia are internalized by a receptor-mediated process in mouse macrophages. Once internalized, the cholesteryl esters of B-VLDL are hydrolyzed in lysosomes, and the released cholesterol is re-esterified, resulting in a massive accumulation of cholesteryl esters. In the present...

BACKGROUND Studies of the genetic and environmental influences on apolipoproteins have been conducted, but few have used data from Japanese twins. The aim of this study was to quantify and compare the genetic and environmental causes of individual differences in the serum concentrations of apolipoproteins in Japanese middle-aged twins. METHODS Apo A-I, apo A-II, apo B, apo C-II, apo C-III, an...

BACKGROUND Smith-Lemli-Opitz syndrome (MIM 270400) is an autosomal recessive malformation and mental retardation syndrome that ranges in clinical severity from minimal dysmorphism and mild mental retardation to severe congenital anomalies and intrauterine death. Smith-Lemli-Opitz syndrome is caused by mutations in the Delta7 sterol-reductase gene (DHCR7; EC 1.3.1.21), which impair endogenous ch...

Cholesterol absorption, fecal elimination, and synthesis and low density lipoprotein (LDL) metabolism were measured in 29 middle-aged men while on their normal diet and a diet low in fat and cholesterol, and the obtained values were related to apoprotein (apo) E phenotypes. Basal cholesterol absorption efficiency was positively related to production rate (PR) for LDL apo B and negatively to cho...

To explore the potential of the common marmoset monkey (Callithrix jacchus) as a model for human plasma lipoprotein metabolism, several marmoset apolipoproteins were isolated and characterized in this study. Based on several properties, including molecular weight, amino acid composition, and sequence, the marmoset apolipoproteins are strikingly similar to human apolipoprotein (apo) A-I, A-II, C...

The hypothesis that apolipoprotein E (apo E)-isoform-related differences in plasma and LDL cholesterol concentrations are due to differential responses to dietary lipids was explored in 110 North Karelian subjects who had previously participated in dietary intervention studies. This was accomplished by collecting fresh blood samples for apo E phenotyping and by re-analysis of the original plasm...