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- W2073107509 abstract "Neuropeptide Y (NPY) is the most potent endogenous orexigenic signal. Several lines of evidence indicate that the site of NPY action in transducing feeding signal may reside in the paraventricular nucleus (PVN) and neighboring sites in the hypothalamus. To test the hypothesis that an increase in NPY activity in the ARC-PVN pathway precedes the onset of diabetic hyperphagia, we evaluated NPY levels in seven hypothalamic nuclei and NPY gene expression in the hypothalamus at 48, 72 or 96 h after streptozotocin (STZ) treatment in rat. In STZ-treated diabetic rats, NPY gene expression in the hypothalamus and NPY levels only in the PVN significantly elevated at 48 h, while hyperphagia occurred sometimes after 48 h post-injection. These results show that augmentation in NPY neuronal activity in the ARC-PVN axis precedes the onset of increased food intake produced by STZ-induced insulinopenia. These findings affirm the hypothesis that increased NPY neurosecretion in the PVN may underlie the diabetes-induced hyperphagia." @default.
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- W2073107509 date "1997-05-01" @default.
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- W2073107509 title "Evidence that hypothalamic neuropeptide Y gene expression and NPY levels in the paraventricular nucleus increase before the onset of hyperphagia in experimental diabetes" @default.
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- W2073107509 doi "https://doi.org/10.1016/s0006-8993(97)00192-3" @default.
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