Publications by Michel Prudent

In vitro-transfusional model for red-blood-cell study: the advantage of lowering hematocrit

Gerardo Turcatti, Michel Prudent, Manon Sandra Bardyn, David Crettaz

Background - Thequalityof red blood cells (RBCs) stored in red cell concentrates (RCCs) is influenced by processing, storage and donor characteristics, and can have a clinical impact on transfused patients. To evaluate RBC properties and their potential im ...

Simtipro Srl2023

Image- and Fluorescence-Based Test Shows Oxidant-Dependent Damages in Red Blood Cells and Enables Screening of Potential Protective Molecules

Gerardo Turcatti, Michel Prudent, Benjamin Rappaz, Manon Sandra Bardyn, David Crettaz

An increase of oxygen saturation within blood bags and metabolic dysregulation occur during storage of red blood cells (RBCs). It leads to the gradual exhaustion of RBC antioxidant protective system and, consequently, to a deleterious state of oxidative st ...

2021

Quantification of stored red blood cell fluctuations by time-lapse holographic cell imaging

Gerardo Turcatti, Pierre Marquet, Michel Prudent, Benjamin Rappaz, Manon Sandra Bardyn

We propose methods to quantitatively calculate the fluctuation rate of red blood cells with nanometric axial and millisecond temporal sensitivity at the single-cell level by using time-lapse holographic cell imaging. For this quantitative analysis, cell me ...

2018

Immuno-affinity Amperometric Detection of Bacterial Infections

Hubert Girault, Horst Pick, Michel Prudent, Andreas Stephan Lesch, Yingdi Zhu, Milica Jovic

A combination of an immuno-affinity enrichment strategy and sensitive amperometric read-out was implemented in a point-of-care platform intended for bacterial infection analysis. Bacterial cells, selectively captured and enriched from complex matrices thro ...

Wiley-VCH Verlag GmbH2018

Red blood cells ageing markers: a multi-parametric analysis

Gerardo Turcatti, Michel Prudent, Niels Erik Lion, Benjamin Rappaz, Manon Sandra Bardyn, David Crettaz

Background. Red blood cells collected in citrate-phosphate-dextrose can be stored for up to 42 days at 4 degrees C in saline-adenine-glucose-mannitol additive solution. During this controlled, but nevertheless artificial, ex vivo ageing, red blood cells ac ...

Simti Servizi Srl2017

The antioxidant capacity of erythrocyte concentrates is increased during the first week of storage and correlated with the uric acid level

Hubert Girault, Michel Prudent, Niels Erik Lion, Fernando Cortes Salazar, Manon Sandra Bardyn, Sunny Isaïe Maye, Andreas Stephan Lesch

Background and Objectives: Red blood cells (RBCs) suffer from lesions during cold storage, depending in part on their ability to counterbalance oxidative stress by activating their antioxidant defence. The aim of this study was to monitor the antioxidant p ...

Wiley-Blackwell2017

Sensitive and fast identification of bacteria in blood samples by immunoaffinity mass spectrometry for quick BSI diagnosis

Hubert Girault, Horst Pick, Michel Prudent, Niels Erik Lion, Liang Qiao, Natalia Gasilova, Alexandra Bondarenko, Yingdi Zhu

Bloodstream infections rank among the most serious causes of morbidity and mortality in hospitalized patients, partly due to the long period (up to one week) required for clinical diagnosis. In this work, we have developed a sensitive method to quickly and ...

Royal Soc Chemistry2016

The Antioxidant Defense System of Erythrocyte Concentrates is Increased during the First Week of Storage

Michel Prudent, Niels Erik Lion, Michael Müller, Fernando Cortes Salazar

Wiley-Blackwell2016

Dynamic Metabolic Flux Analysis of Stored Red Blood Cells

Michel Prudent, Niels Erik Lion, Frédéric Stauber

Wiley-Blackwell2016

Molecular screening of cancer-derived exosomes by surface plasmon resonance spectroscopy

Horst Vogel, Michel Prudent, Niels Erik Lion, Luigino Grasso, Romain Wyss, Davide Demurtas, Ashwin Thampi, Lorenz Weidenauer

We report on a generic method to detect and iden- tify the molecular profile of exosomes either derived from cultured cell lines or isolated from biofluids. Exosomes are nanovesicles shed by cells into their microenvironment and carry the molecular identit ...

Springer Heidelberg2015

Loss of Protein Tyr-phosphorylation During in vitro Storage of Human Erythrocytes: Impact on RBC Morphology

Gerardo Turcatti, Pierre Marquet, Michel Prudent, Niels Erik Lion, Benjamin Rappaz

Wiley-Blackwell2014

Large scale inkjet-printing of carbon nanotubes electrodes for antioxidant assays in blood bags

Hubert Girault, Michel Prudent, Niels Erik Lion, Fernando Cortes Salazar, Andreas Stephan Lesch

Herein, we present the large scale fabrication of carbon nanotubes (CNT) electrodes supported on flexible polymeric sheets by subsequent multilayer inkjet printing of a silver layer for electrical connection, CNT layers as active electrode material and an ...

Elsevier2014

Elucidating the role of C-terminal post-translational modifications using protein semisynthesis strategies: α-synuclein phosphorylation at tyrosine 125

Michel Prudent, Bruno Claude Daniel Fauvet, Hilal Lashuel, Mirva Hejjaoui, Filip Vercruysse, Yao Zhang

Despite increasing evidence that supports the role of different post-translational modifications (PTMs) in modulating α-synuclein (α-syn) aggregation and toxicity, relatively little is known about the functional consequences of each modification and whethe ...

2012

Phosphorylation of alpha-Synuclein at Y125 and S129 Alters Its Metal Binding Properties: Implications for Understanding the Role of alpha-Synuclein in the Pathogenesis of Parkinson's Disease and Related Disorders

Hubert Girault, Michel Prudent, Bruno Claude Daniel Fauvet, Hilal Lashuel, Yu Lu

alpha-Synuclein (alpha-syn) is a 140-amino acid protein that plays a central role in the pathogenesis of Parkinson's disease (PD) and other synucleinopathies. However, the molecular determinants that are responsible for triggering and/or propagating alpha- ...

American Chemical Society2011

Electrochemical reactions and ionization processes

Hubert Girault, Michel Prudent, Niels Erik Lion, Mélanie Abonnenc, Hongyan Bi, Liang Qiao

Electrochemical or photo-electrochemical reactions in both electrospray ionization and laser desorption ionization are discussed stressing the role of the electrode reaction in influencing the ionization process. In particular, upon application of a high v ...

2010

Copper(I) and copper(II) binding to β-amyloid 16 (Aβ16) studied by electrospray ionization mass spectrometry

Hubert Girault, Michel Prudent, Yu Lu, Liang Qiao

Copper-b-amyloid 16 (Aβ16) complexes were investigated by electrospray ionization mass spectrometry (ESI-MS). Copper(I) and (II) complexes were formed on-line in a microchip electrospray emitter by using a sacrificial copper electrode as the anode in posit ...

Royal Society of Chemistry2010

Formation and study of single metal ion–phospholipid complexes in biphasic electrospray ionization mass spectrometry

Hubert Girault, Michel Prudent, Anne-Clémence Corminboeuf, Manuel Alejandro Méndez Agudelo, Daniel Filipe Dos Santos Alves Jana

Single metal ion-phospholipid complexes are observed in biphasic electrospray ionization mass spectrometry (BESI-MS) using a dual-channel microsprayer. Such a microsprayer makes it possible to put into contact two immiscible liquids within the Taylor cone. ...

Royal Society of Chemistry2010

Functional Electrospray Emitters

Hubert Girault, Michel Prudent

Electrospray ionisation (ESI) is a soft technique used in mass spectrometry (MS) analysis able to introduce a wide variety of analytes in the gas phase. Briefly, it consists in the application of a high- voltage to a solution to spray it through a small or ...

2009

Plate for matrix-assisted laser desorption ionization mass spectrometry, comprises electroconductive substrate covered with sintered nanoparticles, deposited as array of spots, for supporting ionization of sorbed sample molecules

Hubert Girault, Michel Prudent, Niels Erik Lion, Christophe Roussel, Jingjing Wan, Liang Qiao

NOVELTY - A plate comprises an electroconductive substrate (1) at least partially covered with sintered nanoparticles (2), deposited as an array of individual spots, for use as a sorbing phase for a sample, and for supporting ionization of sorbed sample mo ...

2009

The role of copper in cysteine oxidation: study of intra- and inter-molecular reactions in mass spectrometry

Hubert Girault, Michel Prudent

Cysteine-containing peptide oxidation was studied both by using an inert platinum electrode and a sacrificial electrode (copper or zinc) generating metallic ions in electrospray ionization mass spectrometry (ESI-MS). Using peptides containing one, two and ...

Royal Society of Chemistry2009