scholarly journals Isx Participates in the Maintenance of Vitamin A Metabolism by Regulation of β-Carotene 15,15′-Monooxygenase (Bcmo1) Expression

2007 ◽  
Vol 283 (8) ◽  
pp. 4905-4911 ◽  
Author(s):  
Yusuke Seino ◽  
Takashi Miki ◽  
Hiroshi Kiyonari ◽  
Takaya Abe ◽  
Wakako Fujimoto ◽  
...  
Keyword(s):  
Vitamin A ◽  
Vitamin A Metabolism ◽  
Β Carotene

Effect of supplemental β-carotene compared to retinyl palmitate on fatty acid profile and expression of mRNA from genes involved in vitamin A metabolism in beef feedlot cattle

2017 ◽  
Vol 88 (9) ◽  
pp. 1380-1387 ◽  
Author(s):  
Kaitlin N. Condron ◽  
Jolena N. Waddell ◽  
Matt C. Claeys ◽  
Ronald P. Lemenager ◽  
Jon P. Schoonmaker
Keyword(s):  
Fatty Acid ◽  
Vitamin A ◽  
Fatty Acid Profile ◽  
Retinyl Palmitate ◽  
Feedlot Cattle ◽  
Vitamin A Metabolism ◽  
Β Carotene

THE EFFECT OF SODIUM BENTONITE ADMINISTRATION ON VITAMIN A METABOLISM IN THE RAT

1954 ◽  
Vol 32 (6) ◽  
pp. 593-599 ◽  
Author(s):  
D. H. Laughland ◽  
W. E. J. Phillips
Keyword(s):  
Body Weight ◽  
Vitamin A ◽  
Physical Adsorption ◽  
Liver Weight ◽  
Control Groups ◽  
Prolonged Administration ◽  
Sodium Bentonite ◽  
Vitamin A Metabolism ◽  
Inert Ingredient ◽  
Β Carotene

The inclusion of sodium bentonite in the diet severely limited the ability of vitamin A deficient rats to store the vitamin in the liver. This effect was observed both with vitamin A and with the provitamin β-carotene. Moreover, the liver weight per 100 gm. body weight was found to be less in most of the groups receiving sodium bentonite than in control groups. The results may be interpreted in terms of a physical adsorption of vitamin A or β-carotene on sodium bentonite present in the small intestine. Sodium bentonite cannot be regarded as an inert ingredient of the diet of rats and its prolonged administration might be expected to have deleterious effects.

THE EFFECT OF SODIUM BENTONITE ADMINISTRATION ON VITAMIN A METABOLISM IN THE RAT

1954 ◽  
Vol 32 (1) ◽  
pp. 593-599 ◽  
Author(s):  
D. H. Laughland ◽  
W. E. J. Phillips
Keyword(s):  
Body Weight ◽  
Vitamin A ◽  
Physical Adsorption ◽  
Liver Weight ◽  
Control Groups ◽  
Prolonged Administration ◽  
Sodium Bentonite ◽  
Vitamin A Metabolism ◽  
Inert Ingredient ◽  
Β Carotene

The inclusion of sodium bentonite in the diet severely limited the ability of vitamin A deficient rats to store the vitamin in the liver. This effect was observed both with vitamin A and with the provitamin β-carotene. Moreover, the liver weight per 100 gm. body weight was found to be less in most of the groups receiving sodium bentonite than in control groups. The results may be interpreted in terms of a physical adsorption of vitamin A or β-carotene on sodium bentonite present in the small intestine. Sodium bentonite cannot be regarded as an inert ingredient of the diet of rats and its prolonged administration might be expected to have deleterious effects.

Vitamin A Value of Plant Food Provitamin A - Evaluated by the Stable Isotope Technologies

2014 ◽  
Vol 84 (Supplement 1) ◽  
pp. 25-29 ◽  
Author(s):  
Guangwen Tang
Keyword(s):  
Stable Isotope ◽  
Vitamin A ◽  
Provitamin A ◽  
Animal Origin ◽  
Plant Food ◽  
Plant Foods ◽  
A Value ◽  
Provitamin A Carotenoids ◽  
Β Carotene

Humans need vitamin A and obtain essential vitamin A by conversion of plant foods rich in provitamin A and/or absorption of preformed vitamin A from foods of animal origin. The determination of the vitamin A value of plant foods rich in provitamin A is important but has challenges. The aim of this paper is to review the progress over last 80 years following the discovery on the conversion of β-carotene to vitamin A and the various techniques including stable isotope technologies that have been developed to determine vitamin A values of plant provitamin A (mainly β-carotene). These include applications from using radioactive β-carotene and vitamin A, depletion-repletion with vitamin A and β-carotene, and measuring postprandial chylomicron fractions after feeding a β-carotene rich diet, to using stable isotopes as tracers to follow the absorption and conversion of plant food provitamin A carotenoids (mainly β-carotene) in humans. These approaches have greatly promoted our understanding of the absorption and conversion of β-carotene to vitamin A. Stable isotope labeled plant foods are useful for determining the overall bioavailability of provitamin A carotenoids from specific foods. Locally obtained plant foods can provide vitamin A and prevent deficiency of vitamin A, a remaining worldwide concern.

Vitamin A Metabolism in Infection

1955 ◽  
Vol 57 (2) ◽  
pp. 277-286 ◽  
Author(s):  
B. M. Kagan ◽  
Elizabeth Kaiser
Keyword(s):  
Vitamin A ◽  
Vitamin A Metabolism

scholarly journals Vitamin A and E Homologues Impacting the Fate of Acrylamide in Equimolar Asparagine-Glucose Model System

Antioxidants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 993
Author(s):  
Su Lee Kuek ◽  
Azmil Haizam Ahmad Tarmizi ◽  
Raznim Arni Abd Razak ◽  
Selamat Jinap ◽  
Maimunah Sanny
Keyword(s):  
Vitamin E ◽  
Linear Regression ◽  
Vitamin A ◽  
Regression Model ◽  
Linear Regression Model ◽  
Model System ◽  
Concentration Increase ◽  
Acrylamide Formation ◽  
Β Carotene

This study aims to evaluate the influence of Vitamin A and E homologues toward acrylamide in equimolar asparagine-glucose model system. Vitamin A homologue as β-carotene (BC) and five Vitamin E homologues, i.e., α-tocopherol (AT), δ-tocopherol (DT), α-tocotrienol (ATT), γ-tocotrienol (GTT), and δ-tocotrienol (DTT), were tested at different concentrations (1 and 10 µmol) and subjected to heating at 160 °C for 20 min before acrylamide quantification. At lower concentrations (1 µmol; 431, 403, 411 ppm, respectively), AT, DT, and GTT significantly increase acrylamide. Except for DT, enhancing concentration to 10 µmol (5370, 4310, 4250, 3970, and 4110 ppm, respectively) caused significant acrylamide formation. From linear regression model, acrylamide concentration demonstrated significant depreciation over concentration increase in AT (Beta = −83.0, R2 = 0.652, p ≤ 0.05) and DT (Beta = −71.6, R2 = 0.930, p ≤ 0.05). This study indicates that different Vitamin A and E homologue concentrations could determine their functionality either as antioxidants or pro-oxidants.

Egg white peptide-based immunotherapy enhances vitamin A metabolism and induces RORγt+ regulatory T cells

2019 ◽  
Vol 52 ◽  
pp. 204-211 ◽  
Author(s):  
Daniel Lozano-Ojalvo ◽  
Mónica Martínez-Blanco ◽  
Leticia Pérez-Rodríguez ◽  
Elena Molina ◽  
Carmen Peláez ◽  
...  
Keyword(s):  
T Cells ◽  
Regulatory T Cells ◽  
Vitamin A ◽  
Egg White ◽  
Vitamin A Metabolism

scholarly journals Bioavailability of β-carotene (βC) from purple carrots is the same as typical orange carrots while high-βC carrots increase βC stores in Mongolian gerbils(Meriones unguiculatus)

2006 ◽  
Vol 96 (2) ◽  
pp. 258-267 ◽  
Author(s):  
Mandy Porter Dosti ◽  
Jordan P. Mills ◽  
Philipp W. Simon ◽  
Sherry A. Tanumihardjo
Keyword(s):  
Public Health ◽  
Vitamin A ◽  
Phenolic Acids ◽  
Health Problem ◽  
Public Health Problem ◽  
Meriones Unguiculatus ◽  
Mongolian Gerbils ◽  
Alternative Source ◽  
Β Carotene

Vitamin A (VA) deficiency is a worldwide public health problem. Biofortifying existing sources of β-carotene (βC) and increasing dietary βC could help combat the issue. Two studies were performed to investigate the relative βC bioavailability of a βC supplement to purple, high-βC orange, and typical orange carrots using Mongolian gerbils (Meriones unguiculatus). In study 1, which used a traditional bioavailability design, gerbils (n32) received a diet containing orange, purple, or white carrot powder, or white carrot powder +a βC supplement. In study 2, which included βC-biofortified carrots, gerbils (n 39) received orange, high-βC orange, purple, or white carrot powder in their diet. Both studies lasted 21 d and the gerbils were killed to determine the effect of carrot type or supplement on serum and liver βC, α-carotene, and VA concentrations. Liver stores of βC or VA in the gerbils did not differ between orange and purple carrot diets when equal amounts of βC from each of the diets were consumed (P>0·05). Both the orange and purple carrot diet resulted in higher liver VA compared with the supplement (P<0·05). High-βC carrots resulted in more than 2-fold higher βC and 1·1 times greater VA liver stores compared with typical orange carrots (P<0·05). These results suggest that high-βC carrots may be an alternative source of VA to typical carrots in areas of VA deficiency. Second, phenolics including anthocyanins and phenolic acids in purple carrot do not interfere with the bioavailability of βC from purple carrots.

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