Results 21 to 30 of about 3,830 (170)
Retinol esterification by mammary gland microsomes from the lactating rat.
Journal of Lipid Research, 1982 Because vitamin A in milk is largely present as esterified retinol while blood plasma predominantly contains unesterified retinol, experiments were conducted to determine whether membranes from the lactating mammary gland are able to synthesize retinyl ...
A C Ross
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Analysis of Vitamin A in Multivitamin Products
Регуляторные исследования и экспертиза лекарственных средств, 2021 Vitamin A is present in multivitamin products mainly in the form of retinol esters: retinyl acetate, retinyl palmitate, and beta carotene—retinol precursor (dimer) found in plants, which is capable of converting into retinol in liver cells.
A. S. Alekseeva +5 more
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Journal of Lipid Research, 1988 A simple isocratic high performance liquid chromatography (HPLC) system is described that allows separation and identification of cholesteryl esters, triglycerides, ubiquinone, alpha-tocopherol, dolichol, cholesterol, 7-dehydrocholesterol, and retinol ...
M D Greenspan +3 more
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Retinyl Ester Analysis by Orbitrap Mass Spectrometry
, 2023 Retinoids are light-sensitive molecules that are normally detected by UV absorption techniques. Here we describe the identification and quantification of retinyl ester species by high-resolution mass spectrometry. Retinyl esters are extracted by the method of Bligh and Dyer and subsequently separated by HPLC in runs of 40 min.
Jansen, Jeroen W A +3 more
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Absorption, transport, and storage of retinyl-15-14C palmitate-9,10-3H in the rat
Journal of Lipid Research, 1966 Retinyl-15-14C palmitate-9,10-3H was fed to rats in order to study hydrolysis and reesterification of this ester during digestion, absorption, transportation, and storage.
C.W. Lawrence +3 more
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Plasma clearance of chylomicrons labeled with retinyl palmitate in healthy human subjects.
Journal of Lipid Research, 1984 To estimate hepatic uptake of chylomicron remnants in humans, chylomicrons and intestinal very low density lipoproteins (VLDL) were endogenously labeled with retinyl esters, harvested by plasmapheresis, and pulse-injected into the donor 44 hr after ...
F Berr, F Kern, Jr
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Retinyl ester hydrolases and their roles in vitamin A homeostasis
Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids, 2012 In mammals, dietary vitamin A intake is essential for the maintenance of adequate retinoid (vitamin A and metabolites) supply of tissues and organs. Retinoids are taken up from animal or plant sources and subsequently stored in form of hydrophobic, biologically inactive retinyl esters (REs). Accessibility of these REs in the intestine, the circulation,
Schreiber, Renate +5 more
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Tissue distribution and metabolism of newly absorbed vitamin A in the rat
Journal of Lipid Research, 1965 Chylomicrons containing newly absorbed labeled vitamin A were injected intravenously into normal intact rats, and the tissue distribution of radioactivity was observed for several days.
DeWitt S. Goodman +2 more
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Characterization of liver stellate cell retinyl ester storage [PDF]
Biochemical Journal, 1994 The stellate cells of the liver are the main storage site of retinyl esters in the body. During cultivation in vitro of stellate cells isolated from rat and rabbit livers were observed that the cells rapidly loose their retinyl ester content. Freshly isolated stellate cells contain about 144 nmol of total retinol/mg of protein, while cells cultivated ...
G, Trøen +3 more
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Journal of Lipid Research, 2005 Acyl-CoA-dependent O-acyltransferases catalyze reactions in which fatty acyl-CoAs are joined to acyl acceptors containing free hydroxyl groups to produce neutral lipids.
Chi-Liang Eric Yen +3 more
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