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- W2158346027 abstract "Neuropeptide Y (NPY), a 36-amino acid peptide abundantly expressed in the brain, has been implicated in the regulation of feeding and visceral functions. The present study was designed to investigate whether or not NPY specifically regulates duodenal motility. The manometric method was used to measure duodenal motility in conscious, freely moving rats. The rat duodenum showed phasic contractions mimicking the migrating motor complex in the fasted state that were replaced by irregular contractions after the ingestion of food. NPY powerfully affected the contractile activity after intracerebroventricular (i.c.v.) administration, changing fed (postprandial) patterns into phasic contractions characterized as fasted (interdigestive) patterns. This effect was mediated via receptors with pharmacological profiles similar to rat Y(2) and Y(4) receptors, although neither Y(1) nor Y(5) agonists had any effects on motility despite potent feeding-stimulatory effects. Immunoneutralization with anti-NPY antiserum administered i.c.v. abolished fasted patterns and induced fed-like motor activities. An i.c.v. dose of peptide YY produced a different effect from NPY, with increase in the motor activities of both fed and fasted patterns. These results indicate that fasted and fed motor activities are regulated processes and that NPY induces fasted activity through Y(2), and possibly Y(4), receptors, which may represent an integrated mechanism linked to the onset of feeding behavior." @default.
- W2158346027 created "2016-06-24" @default.
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- W2158346027 date "2000-01-01" @default.
- W2158346027 modified "2023-09-24" @default.
- W2158346027 title "Neuropeptide Y induces fasted pattern of duodenal motility via Y<sub>2</sub> receptors in conscious fed rats" @default.
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- W2158346027 doi "https://doi.org/10.1152/ajpgi.2000.278.1.g32" @default.
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