Results 201 to 210 of about 15,495 (243)
Some of the next articles are maybe not open access.
Placental Transport of Retinol in Sheep
The Journal of Nutrition, 1982Six ewes in the last trimester of pregnancy were maintained on adequate intakes of vitamin A. Indwelling catheters were implanted surgically in fetal jugular veins and carotid arteries. Three ewes and three fatal lambs received intravenous [15-3H] retinol 19 days prior to parturition, followed by sequential sampling of maternal and fetal blood.
S, Donoghue +3 more
openaire +2 more sources
Human serum retinol transport in malabsorption
The American Journal of Clinical Nutrition, 1974Using specific immunoassays for retinol-binding protein (RBP) and prealbumin (PA), the proteins responsible for serum vitamin A transport in man, the retinol transport system has been examined in 22 adults with malabsorption (mean stool fat 23 g/24 hr). Mean serum concentrations of vitamin A and RBP in these patients did not differ from normal, whereas
F R, Smith, J, Lindenbaum
openaire +2 more sources
Human Plasma Retinol Transport in Malabsorption.
Annals of Internal Medicine, 1973Excerpt Plasma vitamin A concentrations are widely used to screen for malabsorption. Isolation and characterization of the proteins responsible for plasma vitamin A transport in man—retinol-binding...
Frank Rees Smith, John Lindenbaum
openaire +1 more source
Retinol Transport and Regeneration of Human Cone Photopigment
Nature New Biology, 1972A PUZZLING characteristic of fundus reflectometry data is that cone photopigment regeneration occurs more rapidly after a brief full bleach than after a prolonged full bleach1,2. The hypothesis that the relative slowness of recovery from extended photolysis results from a reduction in the store of 11-cis retinal available for photopigment synthesis1 ...
openaire +2 more sources
Retinol Transport and Metabolism in Transthyretin-“Knockout” Mice
Nutrition Reviews, 2009Mice were made deficient in transthyretin (TTR), the protein that normally transports plasma retinol complexed with retinol-binding protein (RBP), by targeted mutagenesis (TTR-knockout mice). The TTR- mice were healthy and fertile, despite extremely low plasma retinol and RBP levels (6% of wild type).
openaire +2 more sources
Inter- and Intracellular Transport of Retinol in the Liver
1986Following absorption and esterification by enterocytes in the small intestine, retinol is transported in lymph in chylomicrons [1]. In rats, the retinyl esters are relatively nonexchangeable components of the chylomicrons and their remnants [2]. Accordingly, nearly all the retinyl esters follow the chylomicron remnants when they are taken up by the ...
Rune Blomhoff +2 more
openaire +1 more source
Disturbance of retinol transportation causes nitrofen-induced hypoplastic lung
Journal of Pediatric Surgery, 2007Retinoids play a key role in lung development. Recent studies suggest that retinoid signalling pathway may be disrupted in the nitrofen model of congenital diaphragmatic hernia (CDH), but the exact mechanism is not clearly understood. We hypothesized that nitrofen interferes with cellular uptake of retinol during lung morphogenesis and therefore ...
Nana, Nakazawa +4 more
openaire +2 more sources
Vitamin A Transport and Retinol-Binding Protein Metabolism
1975Publisher Summary This chapter elaborates the vitamin A transport and retinol-binding protein (RBP) metabolism. Vitamin A is a compound that exerts a number of important biological effects. In general, the vitamin is necessary for the support of growth and life of higher animals, since in the absence of vitamin A higher animals cease to grow, and in ...
openaire +2 more sources
Transport across liquid membranes containing vitamin A (retinol acetate)
Journal of Colloid and Interface Science, 2004The role of the surface activity of vitamin A has been studied in the light of the liquid membrane hypothesis of drug action. Transport of relevant amino acids such as serine, threonine, arginine, and histidine and various ions such as calcium, sodium, and potassium in the presence of liquid membranes generated by vitamin A has been studied.
A N, Nagappa +5 more
openaire +2 more sources
Specificity of the Retinol Transporter of the Rat Small Intestine Brush Border
Biochemistry, 1994The uptake of vitamin A (all-trans-retinol) by the absorptive cell of the small intestine is the necessary first step in its utilization by the organism and appears to involve a specific carrier that operates by facilitated diffusion. We investigated the specificity of that process by determining the absorption of all-trans-, 13-cis-, and 9-cis-retinol,
S E, Dew, D E, Ong
openaire +2 more sources