Publications by Romain Guiet | EPFL Graph Search

Injury-induced intestinal stem cell renewal requires capillary morphogenesis gene 2

Béatrice Kunz, Olivier Burri, Françoise Gisou van der Goot Grunberg, Nathalie Brandenberg, Julien Léonard Duc, Romain Guiet, Audrey Geneviève Chuat, Lucie Josepha Marie Bracq

Patients with the rare genetic disorder Hyaline Fibromatosis Syndrome (HFS) often succumb before 18 months of age due to severe diarrhea. As HFS is caused by loss-of-function mutations in the gene encoding capillary morphogenesis gene 2 (CMG2), these sympt ...

Springer Science and Business Media LLC2025

Structural and molecular characterization of astrocyte and vasculature connectivity in the mouse hippocampus and cortex

Henry Markram, Giovanna Ambrosini, Daniel Keller, Marwan Muhammad Ahmed Abdellah, Romain Guiet, Nicolas René Chiaruttini, Elvis Boci

The relation of astrocytic endfeet to the vasculature plays a key functional role in the neuro‐glia‐vasculature unit. We characterize the spatial organization of astrocytes and the structural aspects that facilitate their involvement in molecular exchanges ...

Wiley2024

Stress granules quantification on fixed and live cells

Francesco Stellacci, Romain Guiet, Xufeng Xu

The custom script was written based on Fiji for measuring the number or size of stress granules inside fixed cells (using a fixed threshold) or live cells (using a local maximum). It allows the batch image data processing for the study of the effects of di ...

Zenodo2023

Learning-related congruent and incongruent changes of excitation and inhibition in distinct cortical areas

Carl Petersen, Sylvain Crochet, Romain Guiet, Georgios Foustoukos, Vahid Esmaeili, Keita Tamura, Anastasiia Oryshchuk, Yanqi Liu, Reza Asri

Excitatory and inhibitory neurons in diverse cortical regions are likely to contribute differentially to the transformation of sensory information into goal-directed motor plans. Here, we investigate the relative changes across mouse sensorimotor cortex in ...

2022

Microarrayed human bone marrow organoids for modeling blood stem cell dynamics

Matthias Lütolf, Nathalie Brandenberg, Romain Guiet, Moritz Hofer, Sonja Giger

In many leukemia patients, a poor prognosis is attributed either to the development of chemotherapy resistance by leukemic stem cells (LSCs) or to the inefficient engraftment of transplanted hematopoietic stem/progenitor cells (HSPCs) into the bone marrow ...

AIP Publishing2022

Sphingolipids control dermal fibroblast heterogeneity

Olivier Burri, Sylvia Ho, Romain Guiet, Galina Glousker, Giovanni D'Angelo, Laura Capolupo, Gioele La Manno, Alex Russell Lederer, Irina Khven

Human cells produce thousands of lipids that change during cell differentiation and can vary across individual cells of the same type. However, we are only starting to characterize the function of these cell-to-cell differences in lipid composition. Here, ...

American Association for the Advancement of Science2022

Measuring reporter activity domain in EPI aggregates and Gastruloids.ijm

Matthias Lütolf, Olivier Burri, Romain Guiet, Mehmet Ugur Girgin

This imagej macro analyses the reporter intensity activity and expression domain in EPI aggregates and Gastruloids. ...

Zenodo2022

An Open-Source Whole Slide Image Registration Workflow at Cellular Precision Using Fiji, QuPath and Elastix

Olivier Burri, Jessica Sordet, Arne Seitz, Romain Guiet, Nicolas René Chiaruttini

Image analysis workflows for Histology increasingly require the correlation and combination of measurements across several whole slide images. Indeed, for multiplexing, as well as multimodal imaging, it is indispensable that the same sample is imaged multi ...

FRONTIERS MEDIA SA2022

Capturing Cardiogenesis in Gastruloids

Matthias Lütolf, Romain Guiet, Mehmet Ugur Girgin, Giuliana Rossi, Andrea Boni, Nicolas Antoine Vincent Broguiere

Organoids are powerful models for studying tissue development, physiology, and disease. However, current culture systems disrupt the inductive tissue-tissue interactions needed for the complex morphogenetic processes of native organogenesis. Here, we show ...

CELL PRESS2021

Biotin-NeutrAvidin Mediated Immobilization of Polymer Micro- and Nanoparticles on T Lymphocytes

Harm-Anton Klok, Olivier Burri, Maxime Ayer, Arne Seitz, Romain Guiet

Cells are powerful carriers that can help to improve the delivery of nanomedicines. One approach to use cells as carriers is to immobilize the nanoparticulate cargo on the cell surface. While a plethora of chemical conjugation strategies are available to b ...

2021

T Cell-Mediated Transport of Polymer Nanoparticles across the Blood-Brain Barrier

Harm-Anton Klok, Olivier Burri, Maxime Ayer, Arne Seitz, Romain Guiet, Markus Schuster

Delivery of therapeutics to the central nervous system (CNS) is challenging due to the presence of the blood-brain barrier (BBB). Amongst various approaches that have been explored to facilitate drug delivery to the CNS, the use of cells that have the intr ...

WILEY2020

Hookworms Evade Host Immunity by Secreting a Deoxyribonuclease to Degrade Neutrophil Extracellular Traps

Manuel Kulagin, Arne Seitz, Nicola Harris, Romain Guiet, Beatrice Volpe, Kathleen Shah, Tiffany Babette Angélique Bouchery, Mati André Marie Moyat

Hookworms cause a major neglected tropical disease, occurring after larvae penetrate the host skin. Neutrophils are phagocytes that kill large pathogens by releasing neutrophil extracellular traps (NETs), but whether they target hookworms during skin infec ...

CELL PRESS2020

Cellular Uptake and Intracellular Trafficking of Poly(N-(2-Hydroxypropyl) Methacrylamide)

Harm-Anton Klok, Olivier Burri, Graham Knott, Arne Seitz, Claudia Battistella, Anders Meibom, Romain Guiet, Stéphane Laurent Escrig

Cellular uptake and intracellular trafficking of polymer conjugates or polymer nanoparticles is typically monitored using fluorescence-based techniques such as confocal microscopy. While these methods have provided a wealth of insight into the internalizat ...

American Chemical Society2019

A Derived Positional Mapping of Inhibitory Subtypes in the Somatosensory Cortex

Henry Markram, Olivier Burri, Felix Schürmann, Julie Meystre, Daniel Keller, Romain Guiet, Rahul Valiya Veettil

Obtaining a catalog of cell types is a fundamental building block for understanding the brain. The ideal classification of cell-types is based on the profile of molecules expressed by a cell, in particular, the profile of genes expressed. One strategy is, ...

2019

Podosomes, But not the Maturation status, Determine the Protease-Dependent 3D Migration in human Dendritic cells

Romain Guiet

Dendritic cells (DC) are professional Antigen-Presenting Cells scattered throughout antigen-exposed tissues and draining lymph nodes, and survey the body for pathogens. Their ability to migrate through tissues, a 3D environment, is essential for an effecti ...

2018

Applying Whole Organ Clearing Techniques To Spinal Cord Injury: A Survey Of Techniques

Olivier Burri, Thierry Laroche, Laura Battista, Grégoire Courtine, Romain Guiet, Quentin Barraud, Newton Cho

MARY ANN LIEBERT2018

Antibody-Mediated Trapping of Helminth Larvae Requires CD11b and Fc gamma Receptor I

Manuel Kulagin, Arne Seitz, Nicola Harris, Benjamin John Marsland, Julia Esser-von Bieren, Romain Guiet, Beatrice Volpe, Duncan-Bruce Sutherland

Infections with intestinal helminths severely impact on human and veterinary health, particularly through the damage that these large parasites inflict when migrating through host tissues. Host immunity often targets the motility of tissue-migrating helmin ...

American Association of Immunologists ; Oxford University Press2015

Correlative multicolor 3D SIM and STORM microscopy

Mathias Fournier, Pierre Gönczy, Virginie Hamel, Arne Seitz, Isabelle Fluckiger, Paul Guichard, Romain Guiet

Within the last decade, super-resolution methods that surpass the diffraction limit of light microscopy have provided invaluable insight into a variety of biological questions. Each of these approaches has inherent advantages and limitations, such that the ...

Optical Soc Amer2014

Antibodies Trap Tissue Migrating Helminth Larvae and Prevent Tissue Damage by Driving IL-4Rα-Independent Alternative Differentiation of Macrophages

Fei Chen, Arne Seitz, Ilaria Mosconi, Nicola Harris, Julia Esser-von Bieren, Romain Guiet, Beatrice Volpe, Alessandra Piersigilli

Approximately one-third of the world's population suffers from chronic helminth infections with no effective vaccines currently available. Antibodies and alternatively activated macrophages (AAM) form crucial components of protective immunity against chall ...

Public Library of Science2013