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Vol. 29, No. 1-2, 2007
Issue release date: December 2006
Section title: Original Paper
Dev Neurosci 2007;29:48–58
(DOI:10.1159/000096210)

Expression of SDF-1 and CXCR4 during Reorganization of the Postnatal Dentate Gyrus

Berger O. · Li G. · Han S.-M. · Paredes M. · Pleasure S.J.
Department of Neurology, Programs in Neuroscience and Developmental Biology, University of California, San Francisco, Calif., USA

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: 12/7/2006
Issue release date: December 2006

Number of Print Pages: 11
Number of Figures: 6
Number of Tables: 0

ISSN: 0378-5866 (Print)
eISSN: 1421-9859 (Online)

For additional information: http://www.karger.com/DNE

Abstract

Previous studies have demonstrated that stromal cell-derived factor 1 (SDF-1) is crucial for early dentate development; however, the mouse mutants for this chemokine and its only receptor, CXCR4, are neonatally lethal, making conclusions about the role of these molecules in postnatal development difficult to sustain. Previous expression analyses have used single labeling, but the distribution of CXCR4 is complex and to determine the cell types expressing CXCR4 requires multiple marker labeling. In this study, we examined the distribution of SDF-1 and CXCR4 mRNAs during the first postnatal weeks, combining these markers with several other cell-type-specific markers. We found that SDF-1 has three sites of expression: (1) continuation of prenatal expression in the meninges; (2) expression in Cajal-Retzius cells occupying the molecular layer of the upper and lower blades of the dentate, and (3) the maturing dentate granule neurons themselves. The timing of expression in these three sites corresponds to alterations in the distribution of the primary cell types expressing CXCR4 during the same periods, notably the expression of CXCR4 in radial-glial-like GFAP-expressing dentate precursors and immature dentate granule neurons. Taken together, our data suggest potential ongoing roles for SDF-1/CXCR4 signaling in the dentate gyrus during the early postnatal period that will be tested in the future with more precise genetic approaches.

© 2007 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: 12/7/2006
Issue release date: December 2006

Number of Print Pages: 11
Number of Figures: 6
Number of Tables: 0

ISSN: 0378-5866 (Print)
eISSN: 1421-9859 (Online)

For additional information: http://www.karger.com/DNE


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