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Hamm V, Héraud C, Bott JB, Herbeaux K, Strittmatter C, Mathis C, Goutagny R. Differential contribution of APP metabolites to early cognitive deficits in a TgCRND8 mouse model of Alzheimer's disease. Sci Adv 2017; 3:e1601068. [PMID: 28275722 PMCID: PMC5325539 DOI: 10.1126/sciadv.1601068] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 01/25/2017] [Indexed: 06/06/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative pathology commonly characterized by a progressive and irreversible deterioration of cognitive functions, especially memory. Although the etiology of AD remains unknown, a consensus has emerged on the amyloid hypothesis, which posits that increased production of soluble amyloid β (Aβ) peptide induces neuronal network dysfunctions and cognitive deficits. However, the relative failures of Aβ-centric therapeutics suggest that the amyloid hypothesis is incomplete and/or that the treatments were given too late in the course of AD, when neuronal damages were already too extensive. Hence, it is striking to see that very few studies have extensively characterized, from anatomy to behavior, the alterations associated with pre-amyloid stages in mouse models of AD amyloid pathology. To fulfill this gap, we examined memory capacities as well as hippocampal network anatomy and dynamics in young adult pre-plaque TgCRND8 mice when hippocampal Aβ levels are still low. We showed that TgCRND8 mice present alterations in hippocampal inhibitory networks and γ oscillations at this stage. Further, these mice exhibited deficits only in a subset of hippocampal-dependent memory tasks, which are all affected at later stages. Last, using a pharmacological approach, we showed that some of these early memory deficits were Aβ-independent. Our results could partly explain the limited efficacy of Aβ-directed treatments and favor multitherapy approaches for early symptomatic treatment for AD.
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Affiliation(s)
- Valentine Hamm
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), Université de Strasbourg, Faculté de Psychologie, 12 rue Goethe, F-67000 Strasbourg, France
- LNCA, UMR 7364, CNRS, Neuropôle de Strasbourg, 12 rue Goethe, F-67000 Strasbourg, France
| | - Céline Héraud
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), Université de Strasbourg, Faculté de Psychologie, 12 rue Goethe, F-67000 Strasbourg, France
- LNCA, UMR 7364, CNRS, Neuropôle de Strasbourg, 12 rue Goethe, F-67000 Strasbourg, France
| | - Jean-Bastien Bott
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), Université de Strasbourg, Faculté de Psychologie, 12 rue Goethe, F-67000 Strasbourg, France
- LNCA, UMR 7364, CNRS, Neuropôle de Strasbourg, 12 rue Goethe, F-67000 Strasbourg, France
| | - Karine Herbeaux
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), Université de Strasbourg, Faculté de Psychologie, 12 rue Goethe, F-67000 Strasbourg, France
- LNCA, UMR 7364, CNRS, Neuropôle de Strasbourg, 12 rue Goethe, F-67000 Strasbourg, France
| | - Carole Strittmatter
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), Université de Strasbourg, Faculté de Psychologie, 12 rue Goethe, F-67000 Strasbourg, France
- LNCA, UMR 7364, CNRS, Neuropôle de Strasbourg, 12 rue Goethe, F-67000 Strasbourg, France
| | - Chantal Mathis
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), Université de Strasbourg, Faculté de Psychologie, 12 rue Goethe, F-67000 Strasbourg, France
- LNCA, UMR 7364, CNRS, Neuropôle de Strasbourg, 12 rue Goethe, F-67000 Strasbourg, France
| | - Romain Goutagny
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), Université de Strasbourg, Faculté de Psychologie, 12 rue Goethe, F-67000 Strasbourg, France
- LNCA, UMR 7364, CNRS, Neuropôle de Strasbourg, 12 rue Goethe, F-67000 Strasbourg, France
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