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Pierre Magistretti

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Publications associées (172)

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Differential effects of pro- and anti-inflammatory cytokines alone or in combinations on the metabolic profile of astrocytes

Pierre Magistretti, Igor Allaman

We have previously reported that the pro-inflammatory cytokines tumor necrosis factor-α (TNFα) and interleukin-1β (IL-1β) induce profound modifications of the metabolic profile of astrocytes. The present study was undertaken to further characterize the eff ...

Wiley-Blackwell2011

Neuron-glia metabolic coupling and plasticity

Pierre Magistretti

The focus of the current research projects in my laboratory revolves around the question of metabolic plasticity of neuron-glia coupling. Our hypothesis is that behavioural conditions, such as for example learning or the sleep-wake cycle, in which synaptic ...

Wiley-Blackwell2011

Influence of CRTC1 Polymorphisms on Body Mass Index and Fat Mass in Psychiatric Patients and the General Adult Population

Pierre Magistretti, Murielle Bochud

IMPORTANCE There is a high prevalence of obesity in psychiatric patients, possibly leading to metabolic complications and reducing life expectancy. The CREB-regulated transcription coactivator 1 (CRTC1) gene is involved in energy balance and obesity in ani ...

Amer Medical Assoc2013

Neuroenergetic Response to Prolonged Cerebral Glucose Depletion after Severe Brain Injury and the Role of Lactate

Pierre Magistretti, Jocelyne Bloch

Lactate may represent a supplemental fuel for the brain. We examined cerebral lactate metabolism during prolonged brain glucose depletion (GD) in acute brain injury (ABI) patients monitored with cerebral microdialysis (CMD). Sixty episodes of GD (defined a ...

Mary Ann Liebert2015

Association Study of 182 Candidate Genes in Anorexia Nervosa

Pierre Magistretti

We performed association studies with 5,151 SNPs that were judged as likely candidate genetic variations conferring susceptibility to anorexia nervosa (AN) based on location under reported linkage peaks, previous results in the literature (182 candidate ge ...

2010

Spatial analysis of erythrocyte membrane fluctuations by digital holographic microscopy

Pierre Magistretti, Pierre Marquet, Christian Depeursinge, Benjamin Rappaz, Daniel Boss

Red blood cell (RBC) membrane fluctuations provide important insights into cell states. We present a spatial analysis of red blood cell membrane fluctuations by using digital holographic Microscopy (DHM). This interferometric and dye-free technique, posses ...

Elsevier2009

The human CFTR protein expressed in CHO cells activates aquaporin-3 in a cAMP-dependent pathway: study by digital holographic microscopy

Pierre Magistretti, Pierre Marquet, Sylvain Eric Lengacher, Pascal Jourdain

The transmembrane water movements during cellular processes and their relationship to ionic channel activity remain largely unknown. As an example, in epithelial cells it was proposed that the movement of water could be directly linked to cystic fibrosis t ...

Company of Biologists2014

Measurement of absolute cell volume, osmotic membrane water permeability, and refractive index of transmembrane water and solute flux by digital holographic microscopy

Pierre Magistretti, Pierre Marquet, Christian Depeursinge, Pascal Jourdain, Daniel Boss

A dual-wavelength digital holographic microscope to measure absolute volume of living cells is proposed. The optical setup allows us to reconstruct two quantitative phase contrast images at two different wavelengths from a single hologram acquisition. When ...

SPIE Society of Photo-optical Instrumentation Engineers2013

Improvement of Neuroenergetics by Hypertonic Lactate Therapy in Patients with Traumatic Brain Injury Is Dependent on Baseline Cerebral Lactate/Pyruvate Ratio

Pierre Magistretti, Reto Meuli

Energy dysfunction is associated with worse prognosis after traumatic brain injury (TBI). Recent data suggest that hypertonic sodium lactate infusion (HL) improves energy metabolism after TBI. Here, we specifically examined whether the efficacy of HL (3h i ...

Mary Ann Liebert2016

A New Outlook on Mental Illnesses: Glial Involvement Beyond the Glue

Pierre Magistretti

Mental illnesses have long been perceived as the exclusive consequence of abnormalities in neuronal functioning. Until recently, the role of glial cells in the pathophysiology of mental diseases has largely been overlooked. However recently, multiple lines ...

Frontiers Media Sa2015

Neuroprotective role of lactate after cerebral ischemia

Rolf Gruetter, Pierre Magistretti, Hongxia Lei

It is well established that lactate can be used as an energy substrate by the brain by conversion to pyruvate and a subsequent oxidation in the mitochondria. Knowing the need for readily metabolizable substrates directly after ischemia and the protective e ...

2009

TORC1 is a calcium- and cAMP-sensitive coincidence detector involved in hippocampal long-term synaptic plasticity

Pierre Magistretti

A key feature of memory processes is to link different input signals by association and to preserve this coupling at the level of synaptic connections. Late-phase long-term potentiation (L-LTP), a form of synaptic plasticity thought to encode long-term mem ...

National Academy of Sciences2007

Hypoxia/hypoglycemia preconditioning prevents the loss of functional electrical activity in organotypic slice cultures

Pierre Magistretti

In cerebral ischemic preconditioning (IPC), a first sublethal ischemia increases the resistance of neurons to a subsequent severe ischemia. Despite numerous studies, the mechanisms are not yet fully understood. Our goal is to develop an in vitro model of I ...

2005

Embodied memory: unconscious smiling modulates emotional evaluation of episodic memories

Pierre Magistretti, Delphine Preissmann

Since Damasio introduced the somatic markers hypothesis in Damasio (1994), it has spread through the psychological community, where it is now commonly acknowledged that somatic states are a factor in producing the qualitative dimension of our experiences. ...

Frontiers Media2015

A coherent neurobiological framework for functional neuroimaging provided by a model integrating compartmentalized energy metabolism

Pierre Magistretti

Functional neuroimaging has undergone spectacular developments in recent years. Paradoxically, its neurobiological bases have remained elusive, resulting in an intense debate around the cellular mechanisms taking place upon activation that could contribute ...

National Academy of Sciences2007

L-Lactate protects neurons against excitotoxicity: implication of an ATP-mediated signaling cascade

Pierre Magistretti, Pierre Marquet, Igor Allaman, Pascal Jourdain

Converging experimental data indicate a neuroprotective action of L-Lactate. Using Digital Holographic Microscopy, we observe that transient application of glutamate (100 μM; 2 min) elicits a NMDA-dependent death in 65% of mouse cortical neurons in culture ...

Nature Research2016

Glial Energy Metabolism: Overview

Pierre Magistretti

Astrocytes exhibit several unique metabolic features. They possess a reserve glycolytic capacity that is used to cope with the burden of gultamate recycling. They contain glycogen stores that can be mobilized to face high energy demands following intense n ...

Elsevier2009

Spatially-Resolved Eigenmode Decomposition of Red Blood Cells Membrane Fluctuations Questions the Role of ATP in Flickering

Dimitri Nestor Alice Van De Ville, Pierre Magistretti, Pierre Marquet, Christian Depeursinge, Benjamin Rappaz, Daniel Boss

Red blood cells (RBCs) present unique reversible shape deformability, essential for both function and survival, resulting notably in cell membrane fluctuations (CMF). These CMF have been subject of many studies in order to obtain a better understanding of ...

Public Library Science2012

Ultraliser: a framework for creating multiscale, high-fidelity and geometrically realistic 3D models for in silico neuroscience

Pierre Magistretti, Henry Markram, Felix Schürmann, Daniel Keller, Marwan Muhammad Ahmed Abdellah, Jay Coggan, Nadir Roman Guerrero, Alessandro Enrico Foni, Eleftherios Zisis, Juan José García Cantero

Ultraliser is a neuroscience-specific software framework capable of creating accurate and biologically realistic 3D models of complex neuroscientific structures at intracellular (e.g. mitochondria and endoplasmic reticula), cellular (e.g. neurons and glia) ...

2023

Cell Morphology and Intracellular Ionic Homeostasis explored with a Multimodal Approach combining Epifluorescence and Digital Holographic Microscopy

Pierre Magistretti, Pierre Marquet, Christian Depeursinge, Jonas Kühn, Nicolas Pavillon, Pascal Jourdain, Daniel Boss, Aleksandr Benke

The authors have developed a live-cell multimodality microscope combining epifluorescence with digital holographic microscopy; it has been implemented with a decoupling procedure allowing to separately measure from the quantitative phase important cell par ...

2010