نتایج جستجو برای: plasma lipoproteins
تعداد نتایج: 381096 فیلتر نتایج به سال:
According to one of the common theories (1, 2) of the genesis of atherosclerosis, that disease arises as a complication of the passage of plasma water and its solutes through arterial tissue. In this passage the plasma constituents are believed to move from the arterial lumen across the intimal endothelium and on through the arterial tissue. The low density lipoproteins are thought to share in ...
OBJECTIVE Apolipoprotein (apo) A-II is the second major apo of high-density lipoproteins, yet its pathophysiological roles in the development of atherosclerosis remain unknown. We aimed to examine whether apo A-II plays any role in atherogenesis and, if so, to elucidate the mechanism involved. METHODS AND RESULTS We compared the susceptibility of human apo A-II transgenic (Tg) rabbits to chol...
Apolipoprotein B obtained from each of the major density classes of human plasma lipoproteins was investigated immunochemically. Eleven different mouse hybridoma cell lines were generated and selected on the basis of their ability to secrete antibodies that were bound by either very low density or intermediate density lipoproteins. Two of these antibodies appeared to be specific for complex epi...
Initial rate of cholesterol esterification associated with high density lipoproteins in human plasma
The enzyme 1ecithin:cholesterol acyl transferase has been measured both in total plasma and in the fraction of plasma from which very low and low density lipoproteins have been removed by ultracentrifugation. The correlation between the activity of the enzyme and the free cholesterol concentration was positive in whole plasma and negative in apoB-deficient plasma. On the other hand, the positiv...
Pool sizes and turnover rates of hepatic triglycerides and of lipids of three plasma lipoprotein fractions of human subjects were defined from studies of the rates of incorporation of labeled free glycerol and of labeled palmitate into these lipids, and of distribution and clearance from plasma of intact, endogenously labeled lipoproteins. Incorporation of labeled glycerol and labeled palmitate...
Deficiency of acyl CoA:cholesterol acyltransferase 2 (ACAT2) in mice results in a reduction in cholesterol ester synthesis in the small intestine and liver, which in turn limits intestinal cholesterol absorption, hepatic cholesterol gallstone formation, and the accumulation of cholesterol esters in the plasma lipoproteins. Here we examined the contribution of ACAT2-derived cholesterol esters to...
The source for triacylglycerol-rich lipoprotein cholesterol was investigated in CaCo-2 cells grown on filters separating an upper and a lower well. Oleic acid, a fatty acid that promotes triacylglycerol-rich lipoprotein synthesis and secretion in CaCo-2 cells, increased the vesicular-mediated influx of plasma membrane cholesterol to the endoplasmic reticulum. Unesterified and esterified cholest...
This report describes the development and first applications of a sensitive and specific double antibody radioimmunoassay for human apoplipoprotein E (apoE). ApoE was purified from the very low density lipoproteins of hypertriglyceridemic patients by heparin-agarose affinity chromatography, DEAE-cellulose chromatography, and preparative polyacrylamide gel electrophoresis. The purified apoprotei...
We conducted a comprehensive investigation of the origin of nuclear magnetic resonance (NMR) lineshape variability of plasma lipids among healthy individuals and those with cancer. The methyl and methylene resonances of lipid in human plasma, whose linewidths have been reported to correlate with the presence of malignancy, are composed of the overlapping resonances of "mobile" protons from the ...
We examined the effects of postural change on the concentrations of plasma cholesterol, triglyceride, high-density lipoprotein (HDL) cholesterol, apolipoproteins (apo) A-I and B, and lipoprotein(a) [Lp(a)] in six volunteers who fasted 12 h before blood sampling. Baseline samples were drawn in the standing position; the subjects then assumed the supine or sitting position, and additional blood s...
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