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Salas IH, Weerasekera A, Ahmed T, Callaerts-Vegh Z, Himmelreich U, D'Hooge R, Balschun D, Saido TC, De Strooper B, Dotti CG. High fat diet treatment impairs hippocampal long-term potentiation without alterations of the core neuropathological features of Alzheimer disease. Neurobiol Dis 2018; 113:82-96. [PMID: 29427755 DOI: 10.1016/j.nbd.2018.02.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 02/04/2018] [Indexed: 01/25/2023] Open
Abstract
Type 2 diabetes (T2DM) and obesity might increase the risk for AD by 2-fold. Different attempts to model the effect of diet-induced diabetes on AD pathology in transgenic animal models, resulted in opposite conclusions. Here, we used a novel knock-in mouse model for AD, which, differently from other models, does not overexpress any proteins. Long-term high fat diet treatment triggers a reduction in hippocampal N-acetyl-aspartate/myo-inositol metabolites ratio and impairs long term potentiation in hippocampal acute slices. Interestingly, these alterations do not correlate with changes in the core neuropathological features of AD, i.e. amyloidosis and Tau hyperphosphorylation. The data suggest that AD phenotypes associated with high fat diet treatment seen in other models for AD might be exacerbated because of the overexpressing systems used to study the effects of familial AD mutations. Our work supports the increasing insight that knock-in mice might be more relevant models to study the link between metabolic disorders and AD.
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Affiliation(s)
- Isabel H Salas
- VIB Center for Brain and Disease Research, Leuven, Belgium; KU Leuven Department for Neurosciences, Leuven Institute for Neurodegenerative Disorders (LIND), KU Leuven, Leuven, Belgium
| | - Akila Weerasekera
- Biomedical MRI-Unit/MoSAIC, KU Leuven Campus Gasthuisberg, Leuven, Belgium
| | - Tariq Ahmed
- Laboratory of Biological Psychology, KU Leuven, Leuven, Belgium; Neurological Disorders Research Center, Doha, Qatar
| | | | - Uwe Himmelreich
- Biomedical MRI-Unit/MoSAIC, KU Leuven Campus Gasthuisberg, Leuven, Belgium
| | - Rudi D'Hooge
- Laboratory of Biological Psychology, KU Leuven, Leuven, Belgium
| | - Detlef Balschun
- Laboratory of Biological Psychology, KU Leuven, Leuven, Belgium
| | - Takaomi C Saido
- Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan
| | - Bart De Strooper
- VIB Center for Brain and Disease Research, Leuven, Belgium; KU Leuven Department for Neurosciences, Leuven Institute for Neurodegenerative Disorders (LIND), KU Leuven, Leuven, Belgium; UK Dementia Research Institute (DRI-UK), ION UCL, London, UK.
| | - Carlos G Dotti
- Centro de Biologıa Molecular 'Severo Ochoa' (CSIC/UAM), Madrid, Spain.
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