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Miswiring of limbic thalamocortical projections in the absence of ephrin-A5.
J. Neurosci. 22, 9352-9357 (2002)
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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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Sprache
englisch
Veröffentlichungsjahr
2002
HGF-Berichtsjahr
0
ISSN (print) / ISBN
0270-6474
e-ISSN
1529-2401
Zeitschrift
Journal of Neuroscience
Quellenangaben
Band: 22,
Heft: 21,
Seiten: 9352-9357
Verlag
Society for Neuroscience
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Developmental Genetics (IDG)
PubMed ID
12417660
Erfassungsdatum
2002-12-31