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2-deoxy-D-glucose (2DG) inhibits glycolysis and stimulates food intake. Previous work suggests that fructose may attenuate the hyperglycemic and hypothermic effects of 2DG. The current study examined the effect of intracerebroventricular fructose on 2DG-induced feeding. We found that concentrated fructose injected into the cerebroventricles enhanced food intake both in the presence and absence of 2DG. On the other hand, similar concentrations of glucose suppressed 2DG-induced food intake. These data suggest differences in metabolism of glucose and fructose and may provide insight into the metabolic steps monitored by brain glucoreceptors to control food intake.
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Miller et al. (2002) studied this question.
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