Retinyl Palmitate
Mostrando 1-12 de 20 artigos, teses e dissertações.
-
1. Efect of vitamin A suplementation: a systematic review
Resumo Avaliar o efeito da suplementação de vitamina A, em lactentes e mulheres no pós-parto, nos níveis de retinol sérico e no leite materno. Foram consultadas as bases de dados Medline, PubMed, Lilacs e SciELO. Os descritores utilizados foram: vitamin A, dietary supplement, child, postpartum period, infant e nutrition programs policies. A busca identi
Ciênc. saúde coletiva. Publicado em: 2019-03
-
2. Vitamin A supplementation reduces the Th17-Treg – Related cytokines in obese and non-obese women
ABSTRACT Objective The objective of the present study was to investigate the effect of vitamin A supplementation on serum Th17 (IL-6, IL-17, IFNγ) and Treg (TGF-β, IL-10) related cytokines in obese and non-obese women. Subjects and methods In a randomized double blind placebo controlled design, 56 obese women were randomly assigned to receive either an
Arch. Endocrinol. Metab.. Publicado em: 2016-02
-
3. SÃntese de Derivados de Vitamina A utilizando Lipase de Candida antartica Imobilizada (Novozyme 435) / Vitamin A derivatives synthesis using immobilized lipase from Candida antarctica (Novozyme 435)
The main objective of this work was to synthesize vitamin A derivatives through an enzymatic route, as an alternative to chemistry route, more aggressive to the environment. The conversion of retinyl acetate into retinyl palmitate would result in a product with better market acceptance, since it is more stable than the ester used as substrate. Retinyl adipat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2007
-
4. Efeito da suplementação com retinol palmitato em codornas (Coturnix coturnx japonica) nos níveis de retinol na gema dos ovos
Vitamin A deficiency is a serious public health problem in developing countries, and it causes death and blindness among children in the developing countries. The fortification of food could be an important source of vitamins to control deficiency. 60 Coturnix coturnix japonica quails were used in a randomized design with duration of seven weeks. The birds w
Publicado em: 2007
-
5. Influência de diferentes concentrações de reinóides em formulações dermocosméticas nos efeitos benéficos e/ou colaterais na pele de camundongos sem pêlo / Influence of different concentrations of retinoids in dermocosmetic formulations in their beneficial and/or collateral effects in hairless mice skin.
Os retinóides têm sido amplamente utilizados na clínica dermatológica e nos produtos cosméticos com finalidades preventivas e reparadoras dos efeitos indesejáveis do envelhecimento cutâneo. Considerando que a concentração de retinóides, como por exemplo, o ácido retinóico ou o palmitato de retinila, pode influenciar na eficácia e segurança de u
Publicado em: 2007
-
6. Transfer of retinol from parenchymal to stellate cells in liver is mediated by retinol-binding protein.
Newly absorbed chylomicron remnant retinyl ester is endocytosed by parenchymal liver cells, and retinol is subsequently transferred to perisinusoidal stellate cells in liver. In the present study we have used several approaches to elucidate the mechanism for the paracrine transfer of retinol between liver parenchymal and stellate cells. In one series of expe
-
7. Isomerization of all-trans-retinoids to 11-cis-retinoids in vitro.
The key biochemical process of the vertebrate visual cycle required for rhodopsin regeneration, 11-cis-retinoid production from all-trans-retinoids, is shown to occur in vitro. A 600 X g supernatant from a frog retina/pigment epithelium homogenate transforms added all-trans-[3H]retinol, in a time-dependent fashion, to a mixture of 11-cis-retinol, 11-cis-reti
-
8. Defects in embryonic hindbrain development and fetal resorption resulting from vitamin A deficiency in the rat are prevented by feeding pharmacological levels of all-trans-retinoic acid
Vitamin A is required for reproduction and normal embryonic development. We have determined that all-trans-retinoic acid (atRA) can support development of the mammalian embryo to parturition in vitamin A-deficient (VAD) rats. At embryonic day (E) 0.5, VAD dams were fed purified diets containing either 12 μg of atRA per g of diet (230 μg per rat per day) or
The National Academy of Sciences.
-
9. Chylomicron remnant clearance from the plasma is normal in familial hypercholesterolemic homozygotes with defined receptor defects.
The retinyl palmitate fat tolerance test was used to measure chylomicron remnant clearance in 10 normal subjects (apolipoprotein E [apo E] isotypes 3 or 4 only), 6 normolipidemic apo E2/2 homozygotes and 5 familial hypercholesterolemic homozygotes. Skin fibroblasts with fully upregulated LDL receptors from the latter subjects degraded rabbit 125I-beta VLDL i
-
10. Chylomicron-retinyl palmitate clearance in type I hyperlipidemic families.
Our primary aim was to determine the extent to which intraplasmic retinyl palmitate (RP) transfers to other lipoprotein particles when chylomicron remnants are not produced and/or the plasma RP residence time is increased. The study was conducted on three familial type I hyperlipoproteinemic patients, four lipoprotein lipase (LpL)-deficient heterozygotes, an
-
11. Enzymatic conversion of all-trans-beta-carotene to retinal by a cytosolic enzyme from rabbit and rat intestinal mucosa.
Enzymatic conversion of all-trans-beta-carotene to retinal by a partially purified enzyme from rabbit and rat intestinal mucosa was demonstrated. The enzymatic product was characterized based on the following evidence: (i) The product gave rise to its O-ethyloxime by treatment with O-ethylhydroxylamine with an absorption maximum at 363 nm in ethanol characte
-
12. Retinol esterification by microsomes from the mucosa of human small intestine. Evidence for acyl-Coenzyme A retinol acyltransferase activity.
The mechanism of the intestinal esterification of retinol has been obscure. Recently, an acyl-Coenzyme A (CoA):retinol acyltransferase (ARAT) was found in rat intestinal microsomes, and experiments were therefore conducted to determine whether a corresponding enzyme exists in human small intestine. When microsomes were incubated with [3H]retinol and palmitoy