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Título: | Anosmin-1 over-expression increases adult neurogenesis in the subventricular zone and neuroblast migration to the olfactory bulb |
Autor: | García-González, Diego CSIC ORCID; Murcia-Belmonte, Verónica CSIC ORCID; Esteban, Pedro F.; Ortega, Felipe; Díaz Viñolas, David CSIC ORCID; Sánchez-Vera, Irene CSIC; Lebrón-Galán, Rafael; Escobar-Castañondo, Laura; Martínez-Millán, Luis; Weruaga, Eduardo; García-Verdugo, José Manuel; Berninger, Benedikt; Castro Soubriet, Fernando de CSIC ORCID | Fecha de publicación: | 2016 | Editor: | Springer Nature | Citación: | Brain Structure and Function 221: 239-260 (2016) | Resumen: | New subventricular zone (SVZ)-derived neuroblasts that migrate via the rostral migratory stream are continuously added to the olfactory bulb (OB) of the adult rodent brain. Anosmin-1 (A1) is an extracellular matrix protein that binds to FGF receptor 1 (FGFR1) to exert its biological effects. When mutated as in Kallmann syndrome patients, A1 is associated with severe OB morphogenesis defects leading to anosmia and hypogonadotropic hypogonadism. Here, we show that A1 over-expression in adult mice strongly increases proliferation in the SVZ, mainly with symmetrical divisions, and produces substantial morphological changes in the normal SVZ architecture, where we also report the presence of FGFR1 in almost all SVZ cells. Interestingly, for the first time we show FGFR1 expression in the basal body of primary cilia in neural progenitor cells. Additionally, we have found that A1 over-expression also enhances neuroblast motility, mainly through FGFR1 activity. Together, these changes lead to a selective increase in several GABAergic interneuron populations in different OB layers. These specific alterations in the OB would be sufficient to disrupt the normal processing of sensory information and consequently alter olfactory memory. In summary, this work shows that FGFR1-mediated A1 activity plays a crucial role in the continuous remodelling of the adult OB. | Versión del editor: | https://doi.org/10.1007/s00429-014-0904-8 | URI: | http://hdl.handle.net/10261/288648 | DOI: | 10.1007/s00429-014-0904-8 | E-ISSN: | 1863-2661 |
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