Total 4EBP1 Is Elevated in Liver of Rats in Response to Low Sulfur Amino Acid Intake
Joint Authors
Liu, Hongyun
Stipanuk, Martha H.
Sikalidis, Angelos K.
Kang, Minji
Mazor, Kevin M.
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-09-08
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Translation initiation is known to be regulated by the binding of eukaryotic initiation factor 4E (eIF4E) by binding proteins (4EBPs), and there is evidence that amino acid deprivation and other cellular stresses upregulate 4EBP1 expression.
To pursue the question of whether diets limited in an essential amino acid lead to induction of 4EBP1 expression in vivo, diets that varied in methionine and cystine content were fed to rats for 7 days, and 4EBP1 mRNA and protein levels and 4EBP1 phosphorylation state were determined.
Total 4EBP1 mRNA and protein abundance increased in liver of rats with severely deficient intakes of sulfur amino acids (0.23% or 0.11% methionine without cystine) but not in animals with a less restricted intake of sulfur amino acids (0.11% methionine plus 0.35% cystine) but a similarly restricted intake of total diet (53 to 62% of control).
The amount of 4EBP1 binding activity (α + β forms) was elevated in liver of rats fed sulfur amino acid-deficient diets, whereas the hyperphosphorylation of 4EBP1 was not affected by dietary treatment.
Results suggest that changes in total 4EBP1 expression should be considered when examining mechanisms that attenuate protein synthesis during amino acid deficiency states.
American Psychological Association (APA)
Sikalidis, Angelos K.& Mazor, Kevin M.& Kang, Minji& Liu, Hongyun& Stipanuk, Martha H.. 2013. Total 4EBP1 Is Elevated in Liver of Rats in Response to Low Sulfur Amino Acid Intake. Journal of Amino Acids،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-504511
Modern Language Association (MLA)
Sikalidis, Angelos K.…[et al.]. Total 4EBP1 Is Elevated in Liver of Rats in Response to Low Sulfur Amino Acid Intake. Journal of Amino Acids No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-504511
American Medical Association (AMA)
Sikalidis, Angelos K.& Mazor, Kevin M.& Kang, Minji& Liu, Hongyun& Stipanuk, Martha H.. Total 4EBP1 Is Elevated in Liver of Rats in Response to Low Sulfur Amino Acid Intake. Journal of Amino Acids. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-504511
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-504511