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Göteborgs universitets publikationer

Blockade of growth hormone secretagogue receptor 1A signaling by JMV 2959 attenuates the NMDAR antagonist, phencyclidine-induced impairments in prepulse inhibition

Författare och institution:
Jörgen Engel (Institutionen för neurovetenskap och fysiologi, sektionen för farmakologi); Elisabeth Jerlhag (Institutionen för neurovetenskap och fysiologi, sektionen för farmakologi); Lennart Svensson (Institutionen för neurovetenskap och fysiologi, sektionen för farmakologi); R. G. Smith (-); Emil Egecioglu (Institutionen för neurovetenskap och fysiologi, sektionen för farmakologi)
Publicerad i:
Psychopharmacology, 232 ( 23 ) s. 4285-4292
ISSN:
0033-3158
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2015
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
Schizophrenic-spectrum patients commonly display deficits in preattentive information processing as evidenced, for example, by disrupted prepulse inhibition (PPI), a measure of sensorimotor gating. Similar disruptions in PPI can be induced in rodents and primates by the psychotomimetic drug phencyclidine (PCP), a noncompetitive inhibitor of the NMDA receptor. Mounting evidence suggests that the hunger hormone ghrelin and its constitutively active receptor influences neuronal circuits involved in the regulation of mood and cognition. In the present series of experiments, we investigated the effects of ghrelin and the growth hormone secretagogue receptor (GHS-R1A) neutral antagonist, JMV 2959, on acoustic startle responses (ASR), PPI, and PCP-induced alterations in PPI. Intraperitoneal (i.p.) administration of ghrelin (0.033, 0.1, and 0.33 mg/kg) did not alter the ASR or PPI in rats. Conversely, i.p. injection of JMV 2959 (1, 3, and 6 mg/kg), dose dependently decreased the ASR and increased PPI. Pretreatment with JMV 2959 at a dose with no effect on ASR or PPI per se, completely blocked PCP-induced (2 mg/kg) deficits in PPI while pretreatment with the highest dose of ghrelin did not potentiate or alter PPI responses of a sub-threshold dose of PCP (0.75 mg/kg). These findings indicate that the GHS-R1A is involved in specific behavioral effects of PCP and may have relevance for patients with schizophrenia.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
MEDICIN OCH HÄLSOVETENSKAP ->
Medicinska grundvetenskaper ->
Farmakologi och toxikologi ->
Farmakologi
MEDICIN OCH HÄLSOVETENSKAP ->
Klinisk medicin ->
Neurologi
Nyckelord:
Cognition, Dopamine, Glutamate, NMDA, GHRELIN RECEPTOR, SYSTEMIC GHRELIN, STARTLE RESPONSE, INDUCED DEFICITS, RATS, SCHIZOPHRENIA, RELEASE, REWARD, AMPHETAMINE, KETAMINE, Neurosciences, Pharmacology & Pharmacy, Psychiatry
Postens nummer:
225865
Posten skapad:
2015-11-17 15:11
Posten ändrad:
2016-08-23 15:14

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