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Study provides the first evidence of a direct relationship between the depression of protein synthesis in skeletal muscle by PIF and Ang II, through activation of PKR, and eIF2{alpha} phosphorylation, and the enhanced degradation of the myofibrillar protein myosin, through activation of NF-{kappa}B resulting in an increased expression and activity of the ubiquitin-proteasome proteolytic pathway. This suggests that agents that target PKR may be effective in the treatment of muscle atrophy in cancer cachexia or other wasting conditions.

Eley, HL and Tisdale, MJ: Nutritional Biomedicine, School of Life and Health Sciences, Aston University, Birmingham UK. January 2007

Skeletal Muscle Atrophy: Link between Depression of Protein Synthesis and Increase in Degradation -- Eley and Tisdale 282 (10): 7087 -- Journal of Biological Chemistry. Eley, HL and Tisdale, MJ: Nutritional Biomedicine, School of Life and Health Sciences, Aston University, Birmingham UK. January 2007