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  • Title: Noradrenaline and neuropeptide Y innervation of the rat hypothalamus are differentially affected by 6-hydroxydopamine.
    Author: Gustafson EL, Moore RY.
    Journal: Neurosci Lett; 1987 Dec 16; 83(1-2):53-8. PubMed ID: 3126463.
    Abstract:
    The neuropeptide Y (NPY) innervation of the hypothalamus is thought to arise largely from noradrenaline (NA) neurons of the medullary tegmentum in the rat. This view was tested in this study by analyzing the effects of intraventricular injections of 6-hydroxydopamine (6-OHDA) on hypothalamic NA and NPY innervation. 6-OHDA markedly depletes or eliminates the NA innervation of the hypothalamus, as demonstrated by dopamine-beta-hydroxylase immunohistochemistry, but does not affect the NPY innervation of the hypothalamus. These results indicate that the hypothalamic NPY innervation arises in large part from intrinsic NPY-producing neurons rather than from medullary neurons in which NA and NPY coexist.
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