| Circadian oscillators in the epithalamus. | |
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MedLine Citation:
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PMID: 20547209 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The habenula complex is implicated in a range of cognitive, emotional and reproductive behaviors, and recently this epithalamic structure was suggested to be a component of the brain's circadian system. Circadian timekeeping is driven in cells by the cyclical activity of core clock genes and proteins such as per2/PER2. There are currently no reports of rhythmic clock gene/protein expression in the habenula and therefore the question of whether this structure has an intrinsic molecular clock remains unresolved. Here, using videomicroscopy imaging and photon-counting of a PER2::luciferase (LUC) fusion protein together with multiunit electrophysiological recordings, we tested the endogenous circadian properties of the mouse habenula in vitro. We show that a circadian oscillator is localized primarily to the medial portion of the lateral habenula. Rhythms in PER2:: LUC bioluminescence here are visualized in single cells and oscillations continue in the presence of the sodium channel blocker, tetrodotoxin, indicating that individual cells have intrinsic timekeeping properties. Ependymal cells lining the dorsal third ventricle also express circadian oscillations of PER2. These findings establish that neurons and non-neuronal cells in the epithalamus express rhythms in cellular and molecular activities, indicating a role for circadian oscillators in the temporal regulation of habenula controlled processes and behavior. |
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Authors:
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C Guilding; A T L Hughes; H D Piggins |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-06-12 |
Journal Detail:
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Title: Neuroscience Volume: 169 ISSN: 1873-7544 ISO Abbreviation: Neuroscience Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-08-09 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7605074 Medline TA: Neuroscience Country: United States |
Other Details:
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Languages: eng Pagination: 1630-9 Citation Subset: IM |
Copyright Information:
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(c) 2010 IBRO. Published by Elsevier Ltd. All rights reserved. |
Affiliation:
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Faculty of Life Sciences, University of Manchester, Manchester, UK. |
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Descriptor/Qualifier:
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| Grant Support | |
ID/Acronym/Agency:
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WT086352//Wellcome Trust; //Biotechnology and Biological Sciences Research Council |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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