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Uziel, D.* ; Mühlfriedel, S.* ; Zarbalis, K.* ; Wurst, W.* ; Levitt, P.* ; Bolz, J.*

Miswiring of limbic thalamocortical projections in the absence of ephrin-A5.

J. Neurosci. 22, 9352-9357 (2002)
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Open Access Green as soon as Postprint is submitted to ZB.
Axon guidance cues of the ephrin ligand family have been hypothesized to regulate the formation of thalamocortical connections, but in vivo evidence for such a role has not been examined directly. To test whether ephrin-mediated repulsive cues participate in sorting the projections originating from distinct thalamic nuclei, we analyzed the organization of somatosensory and anterior cingulate afferents postnatally in mice lacking ephrin-A5 gene expression. Projections from ventrobasal and laterodorsal nuclei to their respective sensory and limbic cortical areas developed normally. However, a portion of limbic thalamic neurons from the laterodorsal nucleus also formed additional projections to somatosensory cortical territories, thus maintaining inappropriate dual projections to multiple cortical regions. These results suggest that ephrin-A5 is not required for the formation of normal cortical projections from the appropriate thalamic nuclei, but rather acts as a guidance cue that restricts limbic thalamic axons from inappropriate neocortical regions.
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Publication type Article: Journal article
Document type Scientific Article
Language english
Publication Year 2002
HGF-reported in Year 0
ISSN (print) / ISBN 0270-6474
e-ISSN 1529-2401
Quellenangaben Volume: 22, Issue: 21, Pages: 9352-9357 Article Number: , Supplement: ,
Publisher Society for Neuroscience
Reviewing status Peer reviewed
PubMed ID 12417660
Erfassungsdatum 2002-12-31