Abstract：
:There is much interest in precise functions of amino acids on mammalian growth and development. Some of amino acids play important roles in the control of gene expression by controlling the initiation phase of mRNA translation. The signal induced by leucine or arginine may stimulate cell growth. On the other hand, the other signal induced by glutamine may stimulate cellular proliferation and increase cell number, but inhibit the growth of cell size. However, there was no clear evidence that an individual amino acid specifically works as a signaling molecule. In our recent study, not only leucine, but also arginine is shown to activate the mTOR signaling pathway in rat intestinal epithelial cells. Furthermore, regarding L-Glutamine, an important amino acid that is required for culturing of numerous cell types, including rat intestinal epithelial cells, we have shown that it had an inhibitory effect on leucine- or arginine-induced activation of the mTOR signaling pathway. We have demonstrated that L-Glutamine inhibited the activation of p70 S6 kinase and phosphorylation of 4E-BP1 induced by arginine or leucine in rat intestinal epithelial cells. Based on these results, we are planning to confirm the effect of each amino acid including glutamine in an in vivo model using new born mice.
journal_name
Int J Mol Medjournal_title
International journal of molecular medicineauthors
Naomoto Y,Yamatsuji T,Shigemitsu K,Ban H,Nakajo T,Shirakawa Y,Motok T,Kobayashi M,Gunduz M,Tanaka Nsubject
Has Abstractpub_date
2005-08-01 00:00:00pages
201-4issue
2eissn
1107-3756issn
1791-244Xjournal_volume
16pub_type
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