Abstract
In the first study, injection of NPY into the hypothalamic paraventricular nucleus (PVN) caused a robust feeding effect that was attenuated by intravenous infusions of glucose, but not fructose. It is suggested that increased blood glucose has a direct central effect on NPY feeding mechanisms. In a second study, and contrary to a previous report, peripheral administration of CCK-8 had a marked satiety effect in NPY-treated rats. Thus, NPY-induced feeding is, at least for a short time, possibly subject to the satiating action of prandially-released CCK. In a final study, NPY was shown to be without effect on gastric emptying of a solid test meal.
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