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Göteborgs universitets publikationer

Anorexigenic and electrophysiological actions of novel ghrelin receptor (GHS-R1A) antagonists in rats.

Författare och institution:
Nicolas Salomé (Institutionen för neurovetenskap och fysiologi, sektionen för fysiologi); David Haage (Institutionen för neurovetenskap och fysiologi, sektionen för fysiologi); Perrissoud (-); Moulin (-); Demange (-); Emil Egecioglu (Institutionen för neurovetenskap och fysiologi, sektionen för fysiologi); Fehrentz (-); Martinez (-); Suzanne L. Dickson (Institutionen för neurovetenskap och fysiologi, sektionen för fysiologi)
Publicerad i:
European journal of pharmacology, 612 ( 1-3 ) s. 167-173
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
Here we provide the first pharmacological exploration of the impact of acute central nervous system exposure to three recently developed ghrelin receptor (GHS-R1A) ligands on food intake and on the electrical activity of the target cells for ghrelin in the hypothalamus. Central (i.c.v) injection of GHS-R1A antagonists to rats suppressed food intake induced by i.c.v ghrelin injection (1 mug) in a dose-dependent manner with a total blockade at concentrations of 0.4 mug and 8 mug for JMV 3002 and JMV 2959 respectively. JMV 2810, a partial agonist, also suppressed ghrelin-induced food intake (range: 0.02-2 mug). Moreover all three compounds reduced fasting-induced food intake in rats (i.e. the amount of food eaten during the first hour of food exposure after a 16 h fast). At the single cell level we also explored the effects of the compounds to suppress ghrelin (0.5 muM)-induced changes in electrical activity of arcuate nucleus cells recorded extracellularly in a slice preparation. Preincubation followed by perfusion with the GHS-R1A ligands suppressed the responsiveness of arcuate cells to ghrelin. Thus, the recently developed GHS-R1A ligands (JMV 3002, 2959 and 2810) suppress ghrelin-induced and fasting-induced food intake at the level of the central nervous system. This appears to be mediated, at least in part, by a modulation of the activity of ghrelin-responsive arcuate nucleus cells. As the central ghrelin signalling system has emerged as an important pro-obesity target, it will be important to establish the efficacy of these GHS-R1A ligands to reduce fat mass in clinical studies.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Medicinska grundvetenskaper ->
Postens nummer:
Posten skapad:
2009-05-08 14:48
Posten ändrad:
2012-04-12 14:28

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