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• W2030366306 abstract "Neuropeptide Y (NPY), a peptide of the pancreatic polypeptide family, is actually considered to be the most potent stimulator of food intake in rats when centrally injected. It has also suppressive effects on several components of sexual behavior. It was measured in discrete microdissected brain nuclei in obese hyperphagic Zucker fa/fa rats also characterized by a deficient reproductive function, as well as in their lean homozygous (Fa/Fa) and heterozygous (Fa/Fa) counterparts. When compared with the lean (Fa/Fa) rats, NPY concentrations were significantly increased in the obese rats in the arcuate nucleus-median eminence (ARCME, +300%), in the paraventricular (PVN, +60%), suprachiasmatic (SCH, +90%), accumbens (+100%) and supraoptic (+40%) nuclei, as well as in the median preoptic area (MPOA, +70%). As PVN is one of the most important nuclei involved in the control of food intake and one site of NPY action, the high levels found in this nucleus might be a major component at the origin of hyperphagia in the obese animals. Food intake might be overstimulated by a sustained production of NPY as shown by the high concentrations found in the ARCME. NPY might also intervene in the pattern of food intake, for NPY contents were also largely modified in the SCH, the nucleus regulating feeding periodicity and in the MPOA, which is possibly involved in the regulation of energy balance. Finally, as the MPOA is the only site of action of NPY on sexual behavior, the higher levels measured in this area might contribute to the defective reproductive function of the obese Zucker fa/fa rat." @default.
• W2030366306 created "2016-06-24" @default.
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• W2030366306 date "1990-03-01" @default.
• W2030366306 modified "2023-09-27" @default.
• W2030366306 title "Hypothalamic neuropeptide Y (NPY) in obese Zucker rats: Implications in feeding and sexual behaviors" @default.
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• W2030366306 doi "https://doi.org/10.1016/0031-9384(90)90107-f" @default.
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