Randomized trial demonstrates the impact of adrenaline on inhibitor-1 phosphorylation in skeletal muscle, suggesting metabolic significance.
Inhibitor-1 has been shown to be phosphorylated in skeletal muscle in vivo. In normal fed animals the degree of phosphorylation was 31 +/- 7% and this value increases to 70 +/- 12% following an intravenous injection of adrenaline. The results imply that the phosphorylation of inhibitor-1 may be equally as important as the phosphorylation of phosphorylase kinase in elevating the levels of phosphorylase a. The role of inhibitor-1 in metabolism is discussed.
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Foulkes et al. (1979) studied this question.
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