Hypertriglyceridemic very low density lipoproteins (HTG-VLDL, S(f) 60-400) are not taken up by HepG2 cells. However, addition of bovine milk lipoprotein lipase (LPL) at physiological concentrations markedly stimulates uptake. In the present study, we determined whether: a) LPL catalytic activity is required for uptake, b) LPL functions as a ligand, and c) cell surface hepatic triglyceride lipas...

Binding studies at 37 degrees C showed that lipoprotein lipase-treated very low density lipoproteins (LPL-VLDL) and very low density lipoproteins (VLDL), once taken up via the low density lipoprotein (LDL) receptor, are poorly degraded by HepG2 cells as compared with LDL. Determination of the initial endocytotic rate for LPL-VLDL and VLDL as compared to LDL shows that LPL-VLDL and VLDL are inte...

Apolipoproteins C-I1 (apoC-11) and C-111 (apoC-111) are distributed among all the major lipoprotein classes, particularly very low density (VLDL) and high density lipoproteins (HDL). We have determined concentrations of apoC-I1 and apoC-111 in VLDL and HDL in subjects with a wide range of VLDL triglyceride and HDL cholesterol levels, and correlated these levels with fractional catabolic rates (...

The biodistribution and removal from plasma (measured as fractional clearance rate, FCR, per hour) of native and oxidatively modified 99mtechnetium-labeled beta-very low density lipoprotein (99mTc-beta-VLDL) were investigated in hypercholesterolemic (HC) and control (C) three-month old New Zealand rabbits. The intracellular accumulation of beta-VLDL labeled with 99mTc was studied in vitro in TH...

Objective: Brown fat activation attenuates atherosclerosis development by accelerating triglyceride-rich lipoprotein turnover and/or stimulation of reverse cholesterol transport via the SRB1 (scavenger receptor class B type 1). The aim this study was to investigate specific role hepatic in atheroprotective properties brown activation. Approach and Results: APOE*3-Leiden.CETP mice, a well-establ...

VLDL cholesterol concentrations were determined in 1641 male and 608 female and VLDL apolipoprotein B concentrations in 505 male and 211 female company employees in Westphalia aged 17-70 years. VLDL cholesterol and VLDL apolipoprotein B values were found to be distributed with positive skew in both sexes but were higher in men than in women (median in men: VLDL cholesterol 0.30 mmol/l, VLDL apo...

background dyslipidemia is associated with cardiovascular morbidities and mortality. currently, fasting lipid profile determination is used to monitor treatment response. recently, postprandial lipemia is of increasing interest because of its atherogenic and thrombogenic potential and also was found to be more predictive for cardiovascular diseases. objectives to demonstrate postprandial lipemi...

the effect of epinephrine on triacylglycerol secretion was investigated in isolated rat hepatocytes. the effect appeared at concentrations of more than 1 µm and reached a plateau at 10 µm. epinephrine concentration for half of the maximal bioeffect (ec50) was about 1 µm. epineplrrine at a concentration of 10 µm suppressed triacylglycerol secretion by 33% and increased its cellular content by ap...

OBJECTIVE Increased very-low-density lipoprotein triglycerides (VLDL-TG) concentration is a central feature of diabetic dyslipidemia. The objective was to compare basal and insulin mediated VLDL-TG kinetics, oxidation, and adipose tissue storage in type 2 diabetic and healthy (nondiabetic) men. RESEARCH DESIGN AND METHODS Eleven type 2 diabetic and 11 healthy men, matched for BMI and age, wer...