Our data are consistent with a
role for dietary Trp in stimulating IGF-1 signaling within the
setting of dietary protein deficiency, in that Trp supplementation
increased muscle-derived IGF-1 as well as the expression of
genes in the eif4/p70s6k/mTor pathway, known to be activated
by IGF-1. Eif4 is recognized as playing an important role of
muscle protein synthesis