| Fluctuations in cellular proliferation across the light/dark cycle in the subgranular zone of the dentate gyrus in the adult male Syrian hamster. | |
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MedLine Citation:
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PMID: 20184943 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A lifelong persistent neurogenesis occurs in the dentate gyrus of the mammalian hippocampus. Research in peripheral cell tissue has shown that the timing of cellular division of these cells coincide with the light/dark cycle, however it remains unclear as to whether there is an association between the time of day and cellular proliferation in the brain. The timing of cellular division can be studied through the use of a cellular proliferation marker, such as 5-bromo-2-deoxyuridine (BrdU), which is taken up by the DNA of dividing cells during replication. The goal of this study was to determine whether the time of day affects the number of BrdU labeled cells in the subgranular zone of the dentate gyrus of adult male Syrian hamsters. Adult males received a single systemic injection of BrdU (300 mg/kg) at either the end of the light (ZT-13) or dark phase (ZT-23) of a 14:10 LD cycle and were sacrificed 24h or 3 days later. Sections through the hippocampus were immunolabeled for BrdU. Cellular proliferation fluctuated across the light/dark cycle during the expansion phase rather than during initial cellular proliferation. A twofold increase in number was expected between 24 and 72h following a single BrdU injection, but this increase was only seen in the population of cells injected at the end of the light phase. |
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Authors:
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Jeannie Marie Smith; Aaron Hechtman; Jennifer Swann |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. Date: 2010-02-23 |
Journal Detail:
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Title: Neuroscience letters Volume: 473 ISSN: 1872-7972 ISO Abbreviation: Neurosci. Lett. Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-30 Completed Date: 2010-05-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7600130 Medline TA: Neurosci Lett Country: Ireland |
Other Details:
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Languages: eng Pagination: 192-5 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Department of Biological Sciences, Lehigh University, 111 Research Dr, Bethlehem, PA 18015, USA. jeh5@lehigh.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Biological Markers / metabolism Bromodeoxyuridine / metabolism Cell Proliferation Circadian Rhythm Cricetinae Darkness* Dentate Gyrus / cytology* Light* Male Mesocricetus |
| Chemical | |
Reg. No./Substance:
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0/Biological Markers; 59-14-3/Bromodeoxyuridine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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