GABAergic control of hypothalamic melanin-concentrating hormone-containing neurons across the sleep-waking cycle.

Abstract:

:The perifornical-lateral hypothalamic area is implicated in regulating waking and paradoxical sleep. The blockade of GABAA receptors by iontophoretic applications of bicuculline (or gabazine) into the perifornical-lateral hypothalamic area induced a continuous quiet waking state associated to a robust muscle tone in head-restrained rats. During the effects, sleep was totally suppressed. In rats killed at the end of a 90 min ejection of bicuculline, Fos expression was induced in approximately 28% of the neurons immunoreactive for hypocretin and in approximately 3% of the neurons immunostained for melanin-concentrating hormone within the ejection site. These results suggest that neurons containing melanin-concentrating hormone are not active during waking and that the lack of a potent GABAergic influence during waking is consistent with their role in sleep regulation.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Goutagny R,Luppi PH,Salvert D,Gervasoni D,Fort P

doi

10.1097/00001756-200507130-00008

subject

Has Abstract

pub_date

2005-07-13 00:00:00

pages

1069-73

issue

10

eissn

0959-4965

issn

1473-558X

pii

00001756-200507130-00008

journal_volume

16

pub_type

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