Development of sugar and amino acid transport by intestine and yolk sac of the guinea pig

Butt, James H.; Wilson, Thomas H.

doi:10.1152/ajplegacy.1968.215.6.1468

Cited by 47 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This feature is consistent with the findings of Deren et al (1966) and Butt & Wilson (1968) in the rabbit yolk sac. They showed that the yolk sac actively transports L-valine and other neutral amino acids, while it lacks the sugar transport mechanism present in the small intestine of a maturing foetus of the same age.…”

Section: Discussionsupporting

confidence: 94%

Protein, Amino Acids and Glucose in the Yolk-Sac Fluids and Maternal Blood Sera of the Tammar Wallaby, Macropus Eugenii (Desmarest)

Renfree¹

1970

Reproduction

View full text Add to dashboard Cite

Blood sera and yolk-sac fluids were collected from preg¬ nant tammar wallabies and analysed for free amino acids, proteins and glucose.The total and individual concentrations of free amino acids at all stages of pregnancy were higher in yolk-sac fluids than in sera, with the excep¬ tion of glutamic acid, which was at a higher concentration in serum.Protein concentrations were lower in yolk-sac fluids than in the serum but the number of protein components in yolk-sac fluid, as determined by acrylamide gel electrophoresis, increased after implantation.Glucose concentration in yolk-sac fluids also increased with the age of the embryo. These values were lower than those in sera before implanta¬ tion, but higher than in sera after implantation.These results indicate that the transfer and accumulation of nutrient materials in the yolk-sac is not only by simple diffusion from maternal serum, but also by selective transfer through the yolk-sac placenta.

show abstract

Section: Discussionsupporting

confidence: 94%

Protein, Amino Acids and Glucose in the Yolk-Sac Fluids and Maternal Blood Sera of the Tammar Wallaby, Macropus Eugenii (Desmarest)

Renfree¹

1970

Reproduction

View full text Add to dashboard Cite

show abstract

“…Gly*-Leu influxes were also greater in sucklings than in adults. 4.2 and 1.6 times greater in the jejunum and ileum. respectively.…”

Section: In Adultsmentioning

confidence: 85%

“…4. Comparison of uptake rates for Gly-Gly among intestinal preparations to suckling, weanling, and adult guinea pigs.…”

Section: Adult Suckllng Jejunum Ileummentioning

confidence: 99%

Age-Dependent Change in Intestinal Absorption of Dipeptides and Their Constituent Amino Acids in the Guinea Pig

1980

View full text Add to dashboard Cite

SummaryThe influxes from the mucosal solution to the enterocytes were investigated for glycylglycine, glycyl-[.-leucine, and their constituent amino acids in isolated intestinal segments from suckling (3 to 4 days), weanling (10 to 14 days), and adult guinea pigs. Glycine and L-leucine influxes from the mucosal solution containing free glycine or I.-leucine were not significantly different between sucklings and adults in either the jejunum or the ileum. On the other hand, glycylglycine and glycyl-L-leucine influxes were significantly greater in the following sequence: sucklings > weanlings > adults.Such age-dependent difference in dipeptide influx was more prominent in the jejunum than in the ileum. Kinetically, such develop mental change in dipeptide influx was found to be related to the change in the value of J,, (the maximum influx). The data indicated that the intact-peptide transfer mechanism has more important significance in protein hydrolysate absorption in immature stages of animals than in adults.

show abstract

“…The highest rate of active intestinal transport of both amino acids and sugars (9,10,16,22,26) occurs immediately after birth and decreases as a function of age. On the basis of kinetic studies (26), the increase in intracellular accumulation of amino acids in the 2-day-old rat intestine can best be explained by the presence of more transport sites rather than by a more efficient binding by the carrier.…”

Section: Discussionmentioning

confidence: 99%

Metabolic Properties of Neonatal Transport

1974

View full text Add to dashboard Cite

Development of sugar and amino acid transport by intestine and yolk sac of the guinea pig

Cited by 47 publications

References 0 publications

Protein, Amino Acids and Glucose in the Yolk-Sac Fluids and Maternal Blood Sera of the Tammar Wallaby, Macropus Eugenii (Desmarest)

Protein, Amino Acids and Glucose in the Yolk-Sac Fluids and Maternal Blood Sera of the Tammar Wallaby, Macropus Eugenii (Desmarest)

Age-Dependent Change in Intestinal Absorption of Dipeptides and Their Constituent Amino Acids in the Guinea Pig

Metabolic Properties of Neonatal Transport

Contact Info

Product

Resources

About