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Vasculature guides migrating neuronal precursors in the adult mammalian forebrain via brain-derived neurotrophic factor signaling.
J. Neurosci. 29, 4172-4188 (2009)
Adult neuronal precursors retain the remarkable capacity to migrate long distances from the posterior (subventricular zone) to the most anterior [olfactory bulb (OB)] parts of the brain. The knowledge about the mechanisms that keep neuronal precursors in the migratory stream and organize this long-distance migration is incomplete. Here we show that blood vessels precisely outline the migratory stream for new neurons in the adult mammalian forebrain. Real-time video imaging of cell migration in the acute slices demonstrate that neuronal precursors are retained in the migratory stream and guided into the OB by blood vessels that serve as a physical substrate for migrating neuroblasts. Our data suggest that endothelial cells of blood vessels synthesize brain-derived neurotrophic factor (BDNF) that fosters neuronal migration via p75NTR expressed on neuroblasts. Interestingly, GABA released from neuroblasts induces Ca(2+)-dependent insertion of high-affinity TrkB receptors on the plasma membrane of astrocytes that trap extracellular BDNF. We hypothesize that this renders BDNF unavailable for p75NTR-expressing migrating cells and leads to their entrance into the stationary period. Our findings provide new insights into the functional organization of substrates that facilitate the long-distance journey of adult neuronal precursors.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
postnatal subventricular zone; olfactory-bulb neurogenesis; receptor tyrosine kinase; nerve growth-factor; in-vitro; neuroblast migration; cellular composition; progenitor cells; chain-migration; polysialic acid
Language
english
Publication Year
2009
HGF-reported in Year
2009
ISSN (print) / ISBN
0270-6474
e-ISSN
1529-2401
Journal
Journal of Neuroscience
Quellenangaben
Volume: 29,
Issue: 13,
Pages: 4172-4188
Publisher
Society for Neuroscience
Reviewing status
Peer reviewed
Institute(s)
Institute of Stem Cell Research (ISF)
POF-Topic(s)
30204 - Cell Programming and Repair
Research field(s)
Stem Cell and Neuroscience
PSP Element(s)
G-500800-001
PubMed ID
19339612
Scopus ID
65249118446
Erfassungsdatum
2009-12-31