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  • Title: The effects of glucose, acetate, lactate and insulin on protein degradation in the perfused rat heart.
    Author: Sugden PH, Smith DM.
    Journal: Biochem J; 1982 Sep 15; 206(3):467-72. PubMed ID: 6756391.
    Abstract:
    Rat hearts were perfused as working preparations by the method of Taegtmeyer, Hems & Krebs [(1980 Biochem. J. 186, 701--711]. In the presence of glucose, insulin significantly inhibited protein degradation at concentrations as low as 50 mu units/ml. Acetate or lactate, when present either as sole fuel for contraction or in combination with glucose, did not inhibit protein degradation. Insulin inhibition or protein degradation was decreased with either lactate as sole fuel. We suggest that the inhibition of protein degradation occurs over the normal range of plasma concentrations of insulin present in vivo and that the presence of glucose may be at least in part necessary for this effect of insulin.
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