PMID: 9425118Feb 28, 1998Paper

Re-feeding after starvation involves a temporal shift in the control site of glycogen synthesis in rat muscle

The Biochemical Journal
A P JamesP A Fournier

Abstract

The starved-to-fed transition is accompanied by rapid glycogen deposition in skeletal muscles. On the basis of recent findings [Bräu, Ferreira, Nikolovski, Raja, Palmer and Fournier (1997) Biochem. J. 322, 303-308] that during recovery from exercise there is a shift from a glucose 6-phosphate/phosphorylation-based control of glycogen synthesis to a phosphorylation-based control alone, this paper seeks to establish whether a similar shift occurs in muscle during re-feeding after starvation in the rat. Chow re-feeding after 48 h of starvation resulted in glycogen deposition in all muscles examined (white, red and mixed quadriceps, soleus and diaphragm) to levels higher than those in the fed state. Although the early phase of re-feeding was associated with increases in glucose 6-phosphate levels in all muscles, there was no accompanying increase in the fractional velocity of glycogen synthase except in the white quadriceps muscle. This finding, together with the observation that the fractional velocity of glycogen synthase in most muscles was already high in the starved state, suggests that in the initial phase of glycogen deposition the phosphorylation state of the enzyme may be adequate to support net glycogen synthesis. In the ...Continue Reading

Citations

Jul 31, 1999·FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology·M KatsumataM J Dauncey
Jun 6, 2002·Medicine and Science in Sports and Exercise·Timothy J FairchildPaul A Fournier
Jun 6, 2008·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·G RajaP A Fournier
Nov 22, 2002·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·P A FournierT N Palmer
Mar 11, 2008·Metabolism: Clinical and Experimental·Anthony P JamesPaul A Fournier

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