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Title

Further studies on cortical tangential migration in wild type and Pax-6 mutant mice

AuthorsJiménez, David; López-Mascaraque, Laura; Carlos, Juan A. de ; Valverde, Facundo
Issue Date2002
PublisherSpringer
CitationBrain Cell Biology 31: 719- 728 (2002)
AbstractIn this study we present new data concerning the tangential migration from the medial and lateral ganglionic eminences (MGE and LGE) to the cerebral cortex during development. We have used Calbindin as a useful marker to follow the itinerary of tangential migratory cells during early developmental stages in wild-type and Pax-6 homozygous mutant mice. In the wild-type mice, at early developmental stages, migrating cells advance through the intermediate zone (IZ) and preplate (PP). At more advanced stages, migrating cells were present in the subplate (SP) and cortical plate (CP) to reach the entire developing cerebral cortex. We found that, in the homozygous mutant mice (Pax-6Sey-Neu/ Pax-6Sey-Neu), this tangential migration is severely affected at early developmental stages: migrating cells were absent in the IZ, which were only found some days later, suggesting that in the mutant mice, there is a temporal delay in tangential migration. We have also defined some possible mechanisms to explain certain migratory routes from the basal telencephalon to the cerebral cortex. We describe the existence of two factors, which we consider to be essential for the normal migration; the first one is the cell adhesion molecule PSA-NCAM, whose role in other migratory systems is well known. The second factor is Robo-2, whose expression delimits a channel for the passage of migratory cells from the basal telencephalon to the cerebral cortex. © 2003 Kluwer Academic Publishers.
URIhttp://hdl.handle.net/10261/62651
DOI10.1023/A:1025751914372
ISSN1559-7105
Appears in Collections:(IC) Artículos
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