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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/226503
Specific contribution of Reelin expressed by Cajal-Retzius cells or GABAergic interneurons to cortical lamination
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The extracellular protein Reelin, expressed by Cajal–Retzius (CR) cells at early stages of cortical development and at late stages by GABAergic interneurons, regulates radial migration and the “inside-out” pattern of positioning. Current models of Reelin functions in corticogenesis focus on early CR cell–derived Reelin in layer I. However, developmental disorders linked to Reelin deficits, such as schizophrenia and autism, are related to GABAergic interneuron–derived Reelin, although its role in migration has not been established. Here we selectively inactivated the Reln gene in CR cells or GABAergic interneurons. We show that CR cells have a major role in the inside-out order of migration, while CR and GABAergic cells sequentially cooperate to prevent invasion of cortical neurons into layer I. Furthermore, GABAergic cell–derived Reelin compensates some features of the reeler phenotype and is needed for the fine tuning of the layer-specific distribution of cortical neurons. In the hippocampus, the inactivation of Reelin in CR cells causes dramatic alterations in the dentate gyrus and mild defects in the hippocampus proper. These findings lead to a model in which both CR and GABAergic cell–derived Reelin cooperate to build the inside-out order of corticogenesis, which might provide a better understanding of the mechanisms involved in the pathogenesis of neuropsychiatric disorders linked to abnormal migration and Reelin deficits.
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VÍLCHEZ ACOSTA, Alba del valle, MANSO SANZ, Yasmina, CÁRDENAS, Adrián, ELIAS-TERSA, Alba, MARTÍNEZ-LOSA, Magdalena, PASCUAL SÁNCHEZ, Marta, ALVAREZ-DOLADO, Manuel, NAIRN, Angus c., BORRELL FRANCO, Víctor, SORIANO GARCÍA, Eduardo. Specific contribution of Reelin expressed by Cajal-Retzius cells or GABAergic interneurons to cortical lamination. _Proceedings of the National Academy of Sciences of the United States of America - PNAS_. 2022. Vol. 119, núm. 37, pàgs. 1-12. [consulta: 2 de febrer de 2026]. ISSN: 0027-8424. [Disponible a: https://hdl.handle.net/2445/226503]