Different susceptibility to neurodegeneration of dorsal and ventral hippocampal dentate gyrus: A study with transgenic mice overexpressing GSK3β
Entidad
UAM. Departamento de Biología MolecularEditor
Public Library of ScienceFecha de edición
2011-11-03Cita
10.1371/journal.pone.0027262
Plos One 6.11 (2011): e27262
ISSN
1932-6203 (online)DOI
10.1371/journal.pone.0027262Financiado por
This work was supported by grants from the Spanish Comisión Interministerial de Ciencia y Tecnología (CICYT; SAF2010-15525, SAF 2006-02424), the Comunidad de Madrid (NEURODEGMODELS-CM, SAL/0202/2006), Fundación Centro de Investigaciones de Enfermedades Neurológicas (Fundación CIEN, PI 008- 09), the Centro de Investigación Biomédica en Red on Neurodegeneration (CIBER) and by institutional grants from Fundación Botín and Fundación Ramón ArecesProyecto
Comunidad de Madrid. S2006/SAL-0202/NEURODEGMODELS-CMMaterias
Behavior, Animal; Darkness; Dentate Gyrus; Phosphorylation; Glycogen Synthase Kinase 3; Biología y Biomedicina / BiologíaDerechos
© 2011 Fuster-Matanzo et al.Resumen
Dorsal hippocampal regions are involved in memory and learning processes, while ventral areas are related to emotional and anxiety processes. Hippocampal dependent memory and behaviour alterations do not always come out in neurodegenerative diseases at the same time. In this study we have tested the hypothesis that dorsal and ventral dentate gyrus (DG) regions respond in a different manner to increased glycogen synthase kinase-3β (GSK3β) levels in GSK3β transgenic mice, a genetic model of neurodegeneration. Reactive astrocytosis indicate tissue stress in dorsal DG, while ventral area does not show that marker. These changes occurred with a significant reduction of total cell number and with a significantly higher level of cell death in dorsal area than in ventral one as measured by fractin-positive cells. Biochemistry analysis showed higher levels of phosphorylated GSK3β in those residues that inactivate the enzyme in hippocampal ventral areas compared with dorsal area suggesting that the observed susceptibility is in part due to different GSK3 regulation. Previous studies carried out with this animal model had demonstrated impairment in Morris Water Maze and Object recognition tests point out to dorsal hippocampal atrophy. Here, we show that two tests used to evaluate emotional status, the light-dark box and the novelty suppressed feeding test, suggest that GSK3β mice do not show any anxiety-related disorder. Thus, our results demonstrate that in vivo overexpression of GSK3β results in dorsal but not ventral hippocampal DG neurodegeneration and suggest that both areas do not behave in a similar manner in neurodegenerative processes
Lista de ficheros
Google Scholar:Fuster-Matanzo, Almudena
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Lloréns-Martín, María V.
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Gómez De Barreda, Elena
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Ávila, Jesús
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Hernández Pérez, Félix
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