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- W2071329523 abstract "The integration of interneuron subtypes into specific microcircuits is essential for proper cortical function. Understanding to what extent interneuron diversity is regulated and maintained during development might help to reveal the principles that govern their role as synchronizing elements as well as causes for dysfunction. Particular interneuron subtypes are generated in a temporally regulated manner in the medial ganglionic eminence (MGE), the caudal ganglionic eminence, and the preoptic area (POA) of the basal telencephalon. Long-range tangential migration from their site of origin to cortical targets is orchestrated by a variety of attractive, repulsive, membrane-bound, and secreted signaling molecules, to establish the critical balance of inhibition and excitation. It remains unknown whether interneurons deriving from distinct domains are predetermined to migrate in particular routes and whether this process underlies cell type-specific regulation. We found that POA- and MGE-derived cortical interneurons migrate within spatially segregated corridors. EphrinB3, expressed in POA-derived interneurons traversing the superficial route, acts as a repellent signal for deeply migrating interneurons born in the MGE, which is mediated by EphA4 forward signaling. In contrast, EphA4 induces repulsive ephrinB3 reverse signaling in interneurons generated in the POA, restricting this population to the superficial path. Perturbation of this bidirectional ephrinB3/EphA4 signaling in vitro and in vivo leads to a partial intermingling of cells in these segregated migratory pathways. Thus, we conclude that cell contact-mediated bidirectional ephrinB3/EphA4 signaling mediates the sorting of MGE- and POA-derived interneurons in the deep and superficial migratory stream." @default.
- W2071329523 created "2016-06-24" @default.
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- W2071329523 date "2011-12-14" @default.
- W2071329523 modified "2023-10-06" @default.
- W2071329523 title "Bidirectional EphrinB3/EphA4 Signaling Mediates the Segregation of Medial Ganglionic Eminence- and Preoptic Area-Derived Interneurons in the Deep and Superficial Migratory Stream" @default.
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- W2071329523 doi "https://doi.org/10.1523/jneurosci.4690-11.2011" @default.
- W2071329523 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6623906" @default.
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