Publications de Marion Leleu | EPFL Graph Search

Chromatin plasticity predetermines neuronal eligibility for memory trace formation

Liliane Glauser, Maria del Carmen Sandi Perez, Marion Leleu, Johannes Gräff, Simone Astori, Giulia Santoni

Memories are encoded by sparse populations of neurons but how such sparsity arises remains largely unknown. We found that a neuron’s eligibility to be recruited into the memory trace depends on its epigenetic state prior to encoding. Principal neurons in t ...

American Association for the Advancement of Science2024

Chromosome-level organization of the regulatory genome in the Drosophila nervous system

Christian Iseli, Nicolas Jean Philippe Guex, Julien Dorier, Marion Leleu, Brian Donal McCabe, Rebecca Carolyn Smith

Previous studies have identified topologically associating domains (TADs) as basic units of genome organization. We present evidence of a previously unreported level of genome folding, where distant TAD pairs, megabases apart, interact to form meta-domains ...

2023

ROS-induced ribosome impairment underlies ZAKα-mediated metabolic decline in obesity and aging

Marion Leleu

The ribotoxic stress response (RSR) is a signaling pathway in which the p38- and c-Jun N-terminal kinase (JNK)-activating mitogen-activated protein kinase kinase kinase (MAP3K) ZAK alpha senses stalling and/or collision of ribosomes. Here, we show that rea ...

American Association for the Advancement of Science2023

The Transcriptional Regulator Prdm1 Is Essential for the Early Development of the Sensory Whisker Follicle and Is Linked to the Beta-Catenin First Dermal Signal

Yann Barrandon, Bernard Moret, Jessica Sordet, Marion Leleu

Prdm1 mutant mice are one of the rare mutant strains that do not develop whisker hair follicles while still displaying a pelage. Here, we show that Prdm1 is expressed at the earliest stage of whisker development in clusters of mesenchymal cells before plac ...

2022

Integrated proteogenomic deep sequencing and analytics accurately identify non-canonical peptides in tumor immunopeptidomes

Didier Trono, Marion Leleu, Evaristo Jose Planet Letschert, George Coukos, Ioannis Xenarios, Laia Simo Riudalbas, Delphine Yvette L Grun, Alexandre Harari, Markus Müller, Lin Zhang, Marion Arnaud, Florian Huber

Efforts to precisely identify tumor human leukocyte antigen (HLA) bound peptides capable of mediating T cell-based tumor rejection still face important challenges. Recent studies suggest that non-canonical tumor-specific HLA peptides derived from annotated ...

Nature Research2020

Three-dimensional chromatin interactions remain stable upon CAG/CTG repeat expansion

Marion Leleu, Flavia Marzetta, Ioannis Xenarios, Ludovica Vanzan

Expanded CAG/CTG repeats underlie 13 neurological disorders, including myotonic dystrophy type 1 (DM1) and Huntington's disease (HD). Upon expansion, disease loci acquire heterochromatic characteristics, which may provoke changes to chromatin conformation ...

2020

The process of Lewy body formation, rather than simply α-synuclein fibrillization, is one of the major drivers of neurodegeneration

Graham Knott, Hilal Lashuel, Mary-Claude Croisier-Coeytaux, Fabien Kuttler, Marion Leleu, Anne-Laure Mahul Mellier, Niran Maharjan, Johannes Burtscher, Laura Emmeline H Weerens

Parkinson’s disease (PD) is characterized by the accumulation of misfolded and aggregated α-synuclein (α-syn) into intraneuronal inclusions named Lewy bodies (LBs). Although it is widely believed that α-syn plays a central role in the pathogenesis of PD, t ...

National Academy of Sciences2020

Multicenter analysis of sputum microbiota in tuberculosis patients

Stewart Cole, Claudia Sala, Jacques Rougemont, Philippe Busso, Marion Leleu, Andrej Benjak

The impact of tuberculosis and of anti-tuberculosis therapy on composition and modification of human lung microbiota has been the object of several investigations. However, no clear outcome has been presented so far and the relationship betweenM.tuberculos ...

2020

Differential regulation of RNA polymerase III genes during liver regeneration

Felix Naef, Philippe Jacquet, Nicolas Jean Philippe Guex, Jonathan Aryeh Sobel, Cristian Carmeli, Olivier Martin, Irina Krier, Mauro Delorenzi, Nouria Hernandez, Bart Deplancke, Jacques Rougemont, François Mange, Laura Symul, Fabrice David, Sunil Kumar Raghav, Julien Delafontaine, Marion Leleu, Julia Catharina Cajan, Winship Herr, Kyle Gustafson, Maykel Lopes, Dominic Villeneuve, Ioannis Xenarios

Mouse liver regeneration after partial hepatectomy involves cells in the remaining tissue synchronously entering the cell division cycle. We have used this system and H3K4me3, Pol II and Pol III profiling to characterize adaptations in Pol III transcriptio ...

Oxford University Press (OUP)2019

Single-cell transcriptional logic of cell-fate specification and axon guidance in early-born retinal neurons

Marion Leleu, Pierre Raymond Fabre, Gioele La Manno

Retinal ganglion cells (RGCs), cone photoreceptors (cones), horizontal cells and amacrine cells are the first classes of neurons produced in the retina. However, an important question is how this diversity of cell states is transcriptionally produced. Here ...

2019

AMPK promotes survival of c-Myc-positive melanoma cells by suppressing oxidative stress

Friedrich Beermann, Freddy Radtke, Marzia Armaro, Ute Koch, Marion Leleu, Alain Kfoury

2018

Heterogeneous combinatorial expression of Hoxd genes in single cells during limb development

Denis Duboule, Marion Leleu, Pierre Raymond Fabre

Background: Global analyses of gene expression during development reveal specific transcription patterns associated with the emergence of various cell types, tissues, and organs. These heterogeneous patterns are instrumental to ensure the proper formation ...

2018

Large scale genomic reorganization of topological domains at the HoxD locus

Denis Duboule, Daniël Noordermeer, Marion Leleu, Pierre Raymond Fabre, Leonardo Beccari, Benjamin Howard Mormann, Lucille Delisle

BACKGROUND: The transcriptional activation of HoxD genes during mammalian limb development involves dynamic interactions with two topologically associating domains (TADs) flanking the HoxD cluster. In particular, the activation of the most posterior HoxD g ...

2017

A role for mitotic bookmarking of SOX2 in pluripotency and differentiation

Cédric Deluz, Mahé Cécile Raccaud, Suliana Manley, Marion Leleu, Aleksandr Benke, Andrea Callegari, David Michael Suter, Daniel Strebinger, Torgil Elias Friman

Mitotic bookmarking transcription factors remain bound to chromosomes during mitosis and were proposed to regulate phenotypic maintenance of stem and progenitor cells at the mitosis-to-G1 (M-G1) transition. However, mitotic bookmarking remains largely unex ...

Cold Spring Harbor Laboratory2016

Structural Variation-Associated Expression Changes Are Paralleled by Chromatin Architecture Modifications

Jacques Rougemont, Marion Leleu, Nele Gheldof

Copy number variants (CNVs) influence the expression of genes that map not only within the rearrangement, but also to its flanks. To assess the possible mechanism(s) underlying this "neighboring effect", we compared intrachromosomal interactions and histon ...

Public Library of Science2013

A switch between topological domains underlies HoxD genes collinearity in mouse limbs

Denis Duboule, Didier Trono, Guillaume Andrey, Daniël Noordermeer, Marion Leleu

Hox genes are major determinants of the animal body plan, where they organize structures along both the trunk and appendicular axes. During mouse limb development, Hoxd genes are transcribed in two waves: early on, when the arm and forearm are specified, a ...

American Association for the Advancement of Science2013

Processing and analyzing ChIP-seq data: from short reads to regulatory interactions

Jacques Rougemont, Marion Leleu

Chromatin-immunoprecipitation and sequencing (ChIP-seq) is a rapidly maturing technology that draws on the power of high-throughput short-read sequencing to decipher chromatin states with unprecedented precision and breadth. Although some aspects of the ex ...

2010