Results 201 to 210 of about 37,733 (224)

Interaction of drugs and retinol

Biochemical Pharmacology, 1986
In liver microsomes of ethanol-fed rats, retinol competitively inhibited the hydroxylation of aniline, the demethylation of dimethylnitrosamine, and the oxidation of ethanol to acetaldehyde, whereas the inhibition of benzphetamine demethylation was of the mixed type in microsomes of phenobarbital-treated, ethanol-treated or control rats.
Charles S. Lieber, Maria A. Leo, Nancy Lowe   +2 more
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Intraplacental retinol distribution

International Journal of Food Sciences and Nutrition, 2005
With the objective of evaluating intraplacental vitamin A distribution, 234 placental samples were collected, corresponding to six samples from each of the placentas analyzed: two from the lateral maternal portion, one from the central maternal portion, two from the lateral fetal portion, and one from the central fetal portion.
Hernando Flores, Alexandre Gonçalves Soares, Paulo Roberto Borges de Souza Júnior, Maria do Carmo Leal, Mirian Martins Gomes, Ana Paula Pereira Thiapó de Lima, Rejane Andréa Ramalho, Cláudia Saunders, Paula Leite   +8 more
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Intestinal Retinol Esterification and Serum Retinol in Children with Cystic Fibrosis

Journal of Pediatric Gastroenterology and Nutrition, 1986
Summary: Children with cystic fibrosis (CF) often have a poor vitamin A status. We found in the present work a reduced level of serum retinol in older children with this disease. As retinol enters intestinal lymph as retinyl esters, the enzyme acyl‐CoA: retinol acyltransferase (ARAT) may be of importance for retinol absorption.
Sverre O. Lie, Magnhild Rasmussen, Kaare R. Norum, Helge Michalsen, Lizette B. Petersen, Astrid Nilsson   +5 more
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Levels of Liver Retinol and Retinol Ester in Pregnant and Pseudopregnant Rats

The Journal of Nutrition, 1965
Retinol and retinol ester concentrations were determined in the livers of pregnant rats throughout the 21-day period of gestation and compared with those observed in pseudopregnant controls. Data were analyzed by analysis of variance and the results showed that levels of retinol and its ester in the livers of pregnant animals were significantly higher ...
Richard L. Burt, Warren N. Dannenburg
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Prealbumin-retinol-binding-protein-retinol complex in hemodialysis patients

The American Journal of Clinical Nutrition, 1988
In hemodialysis (HD) patients, serum prealbumin (TBPA) is correlated to nutritional status and outcome despite usually elevated serum levels. The purpose of this work was to study the role of TBPA-retinol-binding-protein (RBP)-retinol complex changes in the elevation of serum TBPA in HD patients.
R Calaf, Noël Cano, P. Stroumza, Pascal S, J P Durbec, J. Labastie-Coeyrehourcq, P. Lacombe, J di Costanzo-Dufetel   +7 more
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Retinol and retinol-binding protein in neonates with Bronchopulmonary Dysplasia

Nutrition Research, 1999
Abstract The incidence of Bronchopulmonary Dysplasia (BPD) is high in preterm very-low-birth-weight infants, and prematurity is one the main causes of neonatal and infant morbidity and mortality in Mexico. The objective of the study was to evaluate vitamin A status of infants at risk for BPD.
Roxana Valdés-Ramos, René Humberto Barrera-Reyes, Carlos Meza-Camacho, Arturo Cardona-Pérez, Yazmín Pacheco   +4 more
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Serum Retinol and Retinol-Binding Protein in Mothers and Infants at Delivery

Neonatology, 1983
The relations at birth between infant and maternal serum retinol, retinol-binding protein (RBP) and retinol/RBP molar ratio were investigated in 25 healthy term infants and their mothers. The mean serum levels of retinol and RBP were significantly higher in the mothers, but the mean molar ratio of retinol/RBP (RBP saturation) was significantly higher ...
Lennart Jansson, Bertil Nilsson
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Interactions of retinol with binding proteins: studies with rat cellular retinol-binding protein and with rat retinol-binding protein

Biochemistry, 1991
The interactions of retinol with rat cellular retinol-binding protein (CRBP) and with rat serum retinol-binding protein (RBP) were studied. The equilibrium dissociation constants of the two retinol-protein complexes (Kd) were found to be 13 x 10(-9) and 20 x 10(-9) M for CRBP and for RBP, respectively.
Noa Noy, William S. Blaner
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[54] Retinol 4-hydroxylase

1990
Publisher Summary This chapter discusses incubation and chromatographic procedure of retinol 4-hydroxylase. It also discusses the retinol 4-hydroxylase activity in microsomes and reconstituted systems. By revealing that microsomes are capable of actively metabolizing retinol and by elucidating that cytochrome P-450 isozymes are involved, one has ...
C.S. Lieber, M.A. Leo
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Retinol-Binding Proteins

1974
Publisher Summary This chapter discusses the methods of isolation, chemical nature, physical properties, biochemistry, and methods of assay of retinol-binding proteins (RBP). The discovery of the importance of vitamin A (retinol) and of the animal in preventing night blindness and maintaining normal growth of the animal body, in replacement of ...
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