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Piquet J, Toussay X, Hepp R, Lerchundi R, Le Douce J, Faivre É, Guiot E, Bonvento G, Cauli B. Supragranular Pyramidal Cells Exhibit Early Metabolic Alterations in the 3xTg-AD Mouse Model of Alzheimer's Disease. Front Cell Neurosci 2018; 12:216. [PMID: 30072874 PMCID: PMC6060432 DOI: 10.3389/fncel.2018.00216] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 06/29/2018] [Indexed: 01/23/2023] Open
Abstract
The impairment of cerebral glucose utilization is an early and predictive biomarker of Alzheimer’s disease (AD) that is likely to contribute to memory and cognition disorders during the progression of the pathology. Yet, the cellular and molecular mechanisms underlying these metabolic alterations remain poorly understood. Here we studied the glucose metabolism of supragranular pyramidal cells at an early presymptomatic developmental stage in non-transgenic (non-Tg) and 3xTg-AD mice, a mouse model of AD replicating numerous hallmarks of the disease. We performed both intracellular glucose imaging with a genetically encoded fluorescence resonance energy transfer (FRET)-based glucose biosensor and transcriptomic profiling of key molecular elements of glucose metabolism with single-cell multiplex RT-PCR (scRT-mPCR). We found that juvenile pyramidal cells exhibit active glycolysis and pentose phosphate pathway at rest that are respectively enhanced and impaired in 3xTg-AD mice without alteration of neuronal glucose uptake or transcriptional modification. Given the importance of glucose metabolism for neuronal survival, these early alterations could initiate or at least contribute to the later neuronal dysfunction of pyramidal cells in AD.
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Affiliation(s)
- Juliette Piquet
- UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), Sorbonne Université, Paris, France
| | - Xavier Toussay
- UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), Sorbonne Université, Paris, France
| | - Régine Hepp
- UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), Sorbonne Université, Paris, France
| | - Rodrigo Lerchundi
- CNRS UMR 9199, Commissariat à l'Énergie Atomique et aux Énergies Alternatives (CEA), Département de la Recherche Fondamentale (DRF), Institut de Biologie François Jacob, Molecular Imaging Center (MIRCen), Université Paris-Sud, Université Paris-Saclay, Paris, France
| | - Juliette Le Douce
- CNRS UMR 9199, Commissariat à l'Énergie Atomique et aux Énergies Alternatives (CEA), Département de la Recherche Fondamentale (DRF), Institut de Biologie François Jacob, Molecular Imaging Center (MIRCen), Université Paris-Sud, Université Paris-Saclay, Paris, France
| | - Émilie Faivre
- CNRS UMR 9199, Commissariat à l'Énergie Atomique et aux Énergies Alternatives (CEA), Département de la Recherche Fondamentale (DRF), Institut de Biologie François Jacob, Molecular Imaging Center (MIRCen), Université Paris-Sud, Université Paris-Saclay, Paris, France
| | - Elvire Guiot
- UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), Sorbonne Université, Paris, France
| | - Gilles Bonvento
- CNRS UMR 9199, Commissariat à l'Énergie Atomique et aux Énergies Alternatives (CEA), Département de la Recherche Fondamentale (DRF), Institut de Biologie François Jacob, Molecular Imaging Center (MIRCen), Université Paris-Sud, Université Paris-Saclay, Paris, France
| | - Bruno Cauli
- UPMC Univ Paris 06, INSERM, CNRS, Neuroscience Paris Seine - Institut de Biologie Paris Seine (NPS - IBPS), Sorbonne Université, Paris, France
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Hay YA, Andjelic S, Badr S, Lambolez B. Orexin-dependent activation of layer VIb enhances cortical network activity and integration of non-specific thalamocortical inputs. Brain Struct Funct 2014; 220:3497-512. [PMID: 25108310 DOI: 10.1007/s00429-014-0869-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Accepted: 07/31/2014] [Indexed: 10/24/2022]
Abstract
Neocortical layer VI is critically involved in thalamocortical activity changes during the sleep/wake cycle. It receives dense projections from thalamic nuclei sensitive to the wake-promoting neuropeptides orexins, and its deepest part, layer VIb, is the only cortical lamina reactive to orexins. This convergence of wake-promoting inputs prompted us to investigate how layer VIb can modulate cortical arousal, using patch-clamp recordings and optogenetics in rat brain slices. We found that the majority of layer VIb neurons were excited by nicotinic agonists and orexin through the activation of nicotinic receptors containing α4-α5-β2 subunits and OX2 receptor, respectively. Specific effects of orexin on layer VIb neurons were potentiated by low nicotine concentrations and we used this paradigm to explore their intracortical projections. Co-application of nicotine and orexin increased the frequency of excitatory post-synaptic currents in the ipsilateral cortex, with maximal effect in infragranular layers and minimal effect in layer IV, as well as in the contralateral cortex. The ability of layer VIb to relay thalamocortical inputs was tested using photostimulation of channelrhodopsin-expressing fibers from the orexin-sensitive rhomboid nucleus in the parietal cortex. Photostimulation induced robust excitatory currents in layer VIa neurons that were not pre-synaptically modulated by orexin, but exhibited a delayed, orexin-dependent, component. Activation of layer VIb by orexin enhanced the reliability and spike-timing precision of layer VIa responses to rhomboid inputs. These results indicate that layer VIb acts as an orexin-gated excitatory feedforward loop that potentiates thalamocortical arousal.
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Affiliation(s)
- Y Audrey Hay
- UM CR 18, Neuroscience Paris Seine, Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France.
- UMR 8246, Centre National de la Recherche Scientifique (CNRS), Paris, France.
- UMR-S 1130, Institut national de la Santé et de la Recherche Médicale (INSERM), Paris, France.
| | - Sofija Andjelic
- UM CR 18, Neuroscience Paris Seine, Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France
- UMR 8246, Centre National de la Recherche Scientifique (CNRS), Paris, France
- UMR-S 1130, Institut national de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Sammy Badr
- UM CR 18, Neuroscience Paris Seine, Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France
- UMR 8246, Centre National de la Recherche Scientifique (CNRS), Paris, France
- UMR-S 1130, Institut national de la Santé et de la Recherche Médicale (INSERM), Paris, France
| | - Bertrand Lambolez
- UM CR 18, Neuroscience Paris Seine, Sorbonne Universités, UPMC Univ Paris 06, 75005, Paris, France.
- UMR 8246, Centre National de la Recherche Scientifique (CNRS), Paris, France.
- UMR-S 1130, Institut national de la Santé et de la Recherche Médicale (INSERM), Paris, France.
- UMR 8246, Neuroscience Paris Seine, Université Pierre et Marie Curie, 9 quai St Bernard case 16, 75005, Paris, France.
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Citri A, Pang ZP, Südhof TC, Wernig M, Malenka RC. Comprehensive qPCR profiling of gene expression in single neuronal cells. Nat Protoc 2011; 7:118-27. [PMID: 22193304 DOI: 10.1038/nprot.2011.430] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A major challenge in neuronal stem cell biology lies in characterization of lineage-specific reprogrammed human neuronal cells, a process that necessitates the use of an assay sensitive to the single-cell level. Single-cell gene profiling can provide definitive evidence regarding the conversion of one cell type into another at a high level of resolution. The protocol we describe uses Fluidigm Biomark dynamic arrays for high-throughput expression profiling from single neuronal cells, assaying up to 96 independent samples with up to 96 quantitative PCR (qPCR) probes (equivalent to 9,216 reactions) in a single experiment, which can be completed within 2-3 d. The protocol enables simple and cost-effective profiling of several hundred transcripts from a single cell, and it could have numerous utilities.
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Affiliation(s)
- Ami Citri
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, California, USA.
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