Title : Tissue-specific regulation of 4E-BP1 and S6K1 phosphorylation by alpha-ketoisocaproate.

Pub. Date : 2004 Feb

PMID : 15228219






4 Functional Relationships(s)
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1 In the current study, we compared the effects of L- and D-enantiomers of leucine on the phosphorylation of 4E-BP1 and S6K1. Leucine ribosomal protein S6 kinase B1 Homo sapiens
2 Food-deprived (18 h) rats were orally administered 135 mg/100 g body weight L-leucine, D-leucine or alpha-KIC and were sacrificed after 1 h. L-Leucine administration had an obvious stimulatory effect on the phosphorylation of 4E-BP1 and S6K1 in both skeletal muscle and liver while D-leucine was much less effective, indicating that the effect of leucine is stereospecific. Leucine ribosomal protein S6 kinase B1 Homo sapiens
3 The results showing that the efficacy of L-leucine and alpha-KIC in stimulating phosphorylation of S6K1 and 4E-BP1 is equivalent in skeletal muscle, may be explained by the conversion of alpha-KIC to L-leucine. Leucine ribosomal protein S6 kinase B1 Homo sapiens
4 The results showing that the efficacy of L-leucine and alpha-KIC in stimulating phosphorylation of S6K1 and 4E-BP1 is equivalent in skeletal muscle, may be explained by the conversion of alpha-KIC to L-leucine. Leucine ribosomal protein S6 kinase B1 Homo sapiens