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EFFECT OF ALBUMIN BINDING AND AMINO ACID COMPETITION ON TRYPTOPHAN UPTAKE INTO BRAIN

EFFECT OF ALBUMIN BINDING AND AMINO ACID COMPETITION ON TRYPTOPHAN UPTAKE INTO BRAIN Abstract— In the present study we examine the influence of pH, palmitate, and neutral amino acids on the passage of tryptophan from blood into brain during a single capillary pass, and on the partitioning of tryptophan between free and albumin‐bound forms. The results show that a considerable fraction of albumin‐bound tryptophan is stripped from albumin sites during passage, that uptake is concentration‐dependent, and that amino acid competition for carrier sites is quantitatively the most important factor in regulating tryptophan uptake into brain. The interaction between tryptophan concentration, tryptophan binding, and competing amino acids is of considerable influence on brain serotonin biosynthesis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Neurochemistry Wiley

EFFECT OF ALBUMIN BINDING AND AMINO ACID COMPETITION ON TRYPTOPHAN UPTAKE INTO BRAIN

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References (31)

Publisher
Wiley
Copyright
Copyright © 1977 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0022-3042
eISSN
1471-4159
DOI
10.1111/j.1471-4159.1977.tb10664.x
Publisher site
See Article on Publisher Site

Abstract

Abstract— In the present study we examine the influence of pH, palmitate, and neutral amino acids on the passage of tryptophan from blood into brain during a single capillary pass, and on the partitioning of tryptophan between free and albumin‐bound forms. The results show that a considerable fraction of albumin‐bound tryptophan is stripped from albumin sites during passage, that uptake is concentration‐dependent, and that amino acid competition for carrier sites is quantitatively the most important factor in regulating tryptophan uptake into brain. The interaction between tryptophan concentration, tryptophan binding, and competing amino acids is of considerable influence on brain serotonin biosynthesis.

Journal

Journal of NeurochemistryWiley

Published: May 1, 1977

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