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Preproneuropeptide Y Messenger Ribonucleic Acid in the Hypothalamic Arcuate Nucleus of the Rat is Increased by Food Deprivation or Dehydration
Author(s) -
O'Shea Ross D.,
Gundlach Andrew L.
Publication year - 1991
Publication title -
journal of neuroendocrinology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.062
H-Index - 116
eISSN - 1365-2826
pISSN - 0953-8194
DOI - 10.1111/j.1365-2826.1991.tb00232.x
Subject(s) - arcuate nucleus , endocrinology , medicine , dehydration , hypothalamus , chemistry , nucleus , privation , messenger rna , biology , neuroscience , biochemistry , circadian rhythm , gene , sleep deprivation
The distribution of messenger ribonucleic acid (mRNA) encoding preproneuropeptide Y (prepro‐NPY) in the hypothalamus of rats subjected to food deprivation or dehydration has been investigated by quantitative in situ hybridization. Levels of prepro‐NPY mRNA in the arcuate nucleus (ARC) were selectively increased by both treatments. The very high concentration of prepro‐NPY mRNA seen following 96 h of food deprivation had returned towards control levels after 24 h of refeeding. Levels of preprogalanin (prepro‐GAL) mRNA throughout the hypothalamus were essentially unaffected by both regimes. These results demonstrate that hypothalamic NPY gene expression is regulated by peripheral metabolic status (and osmolality), and confirm the key physiological role of NPY in controlling ingestive behaviour.