Publications associées à Fractionnement cellulaire

Comprehensive analysis of the circadian nuclear and cytoplasmic transcriptome in mouse liver

Felix Naef, Cédric Gobet, Benjamin Dieter Weger, Clémence Yumie Syloun Hurni

In eukaryotes, RNA is synthesised in the nucleus, spliced, and exported to the cytoplasm where it is translated and finally degraded. Any of these steps could be subject to temporal regulation during the circadian cycle, resulting in daily fluctuations of ...

PUBLIC LIBRARY SCIENCE2022

Mammalian membrane trafficking as seen through the lens of bacterial toxins

Françoise Gisou van der Goot Grunberg, Francisco De Magalhães Sarmento R De Mesquita, Oksana Andrei Sergeeva

A fundamental question of eukaryotic cell biology is how membrane organelles are organised and interact with each other. Cell biologists address these questions by characterising the structural features of membrane compartments and the mechanisms that coor ...

WILEY2020

Fluorogenic probes for live-cell imaging

Aleksandar Salim

The development of novel fluorogenic probes and their use in live-cell imaging lead to a plethora of discoveries in biological research. Herein I report on novel red fluorogenic probes for live-cell super-resolution microscopy of various cellular organelle ...

EPFL2020

Metabolic implications of organelle-mitochondria communication

Carlos Canto Alvarez

Cellular organelles are not static but show dynamism-a property that is likely relevant for their function. In addition, they interact with other organelles in a highly dynamic manner. In this review, we analyze the proteins involved in the interaction bet ...

WILEY2019

Mitochondria-specific photoactivation to monitor local sphingosine metabolism and function

Howard Riezman

Photoactivation ('uncaging') is a powerful approach for releasing bioactive small molecules in living cells. Current uncaging methods are limited by the random distribution of caged molecules within cells. We have developed a mitochondria-specific photoact ...

2018

Generation and Characterization of Anti-VGLUT Nanobodies Acting as Inhibitors of Transport

Andrea Volterra

The uptake of glutamate by synaptic vesicles is mediated by vesicular glutamate transporters (VGLUTs). The central role of these transporters in excitatory neurotransmission underpins their importance as pharmacological targets. Although several compounds ...

Amer Chemical Soc2017

Mitochondrial activity detected by cantilever based sensor

Giovanni Dietler, Sandor Kasas, Petar Stupar, Wojciech Chomicki

Our team recently demonstrated that cantilever based devices can detect signature of life in a chemistry independent manner. In this technique, the organism of interest is attached onto a classical AFM cantilever. If alive, it induces nanometre scale oscil ...

Copernicus GmbH2017

Mercury tissue residue approach in Chironomus riparius: Involvement of toxicokinetics and comparison of subcellular fractionation methods

Along with the growing body of evidence that total internal concentration is not a good indicator of toxicity, the Critical Body Residue (CBR) approach recently evolved into the Tissue Residue Approach (TRA) which considers the biologically active portion ...

Elsevier Science Bv2016

Mfn1 Deficiency in the Liver Protects Against Diet-Induced Insulin Resistance and Enhances the Hypoglycemic Effect of Metformin

Carlos Canto Alvarez, Catherine Maclachlan, Patrick Descombes, Sylviane Métairon, Richardus Houtkooper, Joanna Ratajczak, Wen Gao

Mitochondrial function can be influenced by mitochondrial shape and connectivity with other cellular organelles through fusion and fission processes. Disturbances in mitochondrial architecture and mitochondrial fusion related genes are observed in situatio ...

American Diabetes Association2016

Fluorescent Nanodiamond–Gold Hybrid Particles for Multimodal Optical and Electron Microscopy Cellular Imaging

Theo Lasser, Miguel Sison, Weina Liu

There is a continuous demand for imaging probes offering excellent performance in various microscopy techniques for comprehensive investigations. of cellular processes by more than, one technique. FluoreScent nanodianiond gold nanoparticles (END Au) consti ...

American Chemical Society (ACS)2016

Sodium Signaling and Astrocyte Energy Metabolism

Pierre Magistretti, Jean-Yves Chatton

The Na+ gradient across the plasma membrane is constantly exploited by astrocytes as a secondary energy source to regulate the intracellular and extracellular milieu, and discard waste products. One of the most prominent roles of astrocytes in the brain is ...

Wiley-Blackwell2016

Interaction of Silver Nanoparticles (AgNP) with Rainbow Trout Gill Cell Lines

Yang Yue

Owing to their unique antimicrobial properties, silver nanoparticles (AgNP) are among the most widely used engineered nanoparticles in a variety of consumer products and medical applications. Their resulting release into the aquatic environment raises conc ...

EPFL2015

Determination of sub-diffraction-limited organelles and biomolecules using microsphere lenses in combination with fluorescence microscopy

Johan Auwerx, Martinus Gijs, Norman Lionel Moullan, Hui Yang

We propose the use of a high-refractive index glass microsphere in combination with a conventional fluorescence microscope for imaging sub-cellular organelles and biomolecules. The microsphere is placed on a sample that is immersed in water, collects the n ...

Spie-Int Soc Optical Engineering2015

Close Encounter of the Third Kind: The ER Meets Endosomes at Fission Sites

Françoise Gisou van der Goot Grunberg

The endoplasmic reticulum (ER) forms functional contacts with several cellular organelles and regulates processes such as mitochondrial fission. In a recent issue of Cell, Rowland et al. (2014) extend these findings to endosomes, showing that the ER contac ...

Cell Press - Elsevier2014

Comparative Study on the In Vitro Cytotoxicity of Linear, Dendritic, and Hyperbranched Polylysine Analogues

Harm-Anton Klok, Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Zuzana Kadlecova

Lysine-based polycations are widely used as nonviral carriers for gene delivery. This manuscript reports the results of a comparative study on the in vitro cytotoxicity of a library of three structural polylysine variants, namely, linear polylysine (LPL), ...

American Chemical Society2012

Holographic coherent anti-Stokes Raman scattering bio-imaging

Demetri Psaltis

CARS holography captures both the amplitude and the phase of a complex anti-Stokes field, and can perform three-dimensional imaging by digitally focusing onto different depths inside a specimen. The application of CARS holography for bio-imaging is demonst ...

2012

Comprehensive proteome analysis of Mycobacterium ulcerans and quantitative comparison of mycolactone biosynthesis

Stewart Cole, Petra Tafelmeyer

Mycobacterium ulcerans is the causative agent of Buruli ulcer, a rapidly emerging human disease in which mycolactone, a cytotoxic and immunosuppressive macrocyclic polyketide, is responsible for massive skin destruction. The genome sequencing of M. ulceran ...

2008

Micro- and nanostructured devices for investigating biomolecular interactions

Jürgen Brugger, Horst Vogel, Christian Santschi, Christophe Danelon, Jean-Baptiste Perez, Christoph Schreiter

Cell membrane receptors and ion channels are essential in many different cellular processes. To analyse the activity of membrane proteins in vesicles and biological cells, we fabricated micro- nanostructured chips, enabling the application of electrophysio ...

2006

Multiple glycerol shocks increase the calcium phosphate transfection of non-synchronized CHO cells

Florian Maria Wurm, David Hacker, Martin Bertschinger, Frédéric Grosjean

The exposure of CHO DG44 cells to an osmotic shock, after DNA uptake, results in a cellular volume decrease of approx. 55%. Repetitive osmotic shocks targeted different sub-populations of cells as was demonstrated using two different fluorescent reporter g ...

2006

Salt Removal During Off-GelTM Electrophoresis of Protein Samples

Hubert Girault, Niels Erik Lion, Christophe Roussel

The Off-Gel™ technology was recently described for protein fractionation in a solution placed on top of an immobilized pH gradient gel. In addition, this process was found to remove salts from the biological samples to analyze. This desalting effect is stu ...

2005