The presence of vanadate in primary cultures of rat hepatocytes produced a significant increase in the concentration of fructose 2,6-bisphosphate and in the activity of 6-phosphofructo 2-kinase. Compared with insulin, vanadate had a more potent action on the metabolite increase, but a similar effect on the 6-phosphofructo 2-kinase activity. Both the insulin- and the vanadate-dependent enhancements of 6-phosphofructo 2-kinase were inhibited by cycloheximide which specifically blocks protein synthesis on the translational level, suggesting that the increase of the enzyme activity was due to induction rather than to a change in the catalytic activity.
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Miralpeix et al. (1990) studied this question.
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