Publications de Yann Barrandon

Low temperature and mTOR inhibition favor human epidermal stem cell maintenance

Juan Ramon Mosig, Kai Johnsson, Yann Barrandon, Johannes Alexander Mosig, Thomas Michael Braschler, Ariane Rochat, Jean-Baptiste Bureau, Fahd Azzabi Zouraq

ELSEVIER SCIENCE INC2023

Low temperature and mTOR inhibition favor stem cell maintenance in human keratinocyte cultures

Kai Johnsson, Yann Barrandon, Johannes Alexander Mosig, Thomas Michael Braschler, Ariane Rochat, Jean-Baptiste Bureau, Fahd Azzabi Zouraq, Mako Kamiya

Adult autologous human epidermal stem cells can be extensively expanded ex vivo for cell and gene therapy. Identifying the mechanisms involved in stem cell maintenance and defining culture conditions to maintain stemness is critical, because an inadequate ...

WILEY2023

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

Bernard Moret, Yann Barrandon, Marion Leleu, Jessica Sordet

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

Impedance-Based Single-Cell Pipetting

Philippe Renaud, Yann Barrandon, David Vincent Bonzon, Jean-Baptiste Bureau, Georges Muller, Nicolas Jean Bernard Beuchat, Nicolas Uffer

Many biological methods are based on single-cell isolation. In single-cell line development, the gold standard involves the dilution of cells by means of a pipet. This process is time-consuming as it is repeated over several weeks to ensure clonality. Here ...

SAGE PUBLICATIONS INC2020

Traceable Impedance-Based Dispensing and Cloning of Living Single Cells

Philippe Renaud, Yann Barrandon, Ariane Rochat, David Vincent Bonzon, Stéphanie Claudinot, Georges Muller

Single-cell cloning is essential in stem cell biology, cancer research, and biotechnology. Regulatory agencies now require an indisputable proof of clonality that current technologies do not readily provide. Here, we report a one-step cloning method using ...

2020

Tp63-expressing adult epithelial stem cells cross lineages boundaries revealing latent hairy skin competence

Yann Barrandon, Ariane Rochat, Stéphanie Claudinot, Paola Bonfanti, Christèle Gonneau, Daniel-Alexandre Littman

The formation of hair follicles, a landmark of mammals, requires complex mesenchymal-epithelial interactions and it is commonly believed that embryonic epidermal cells are the only cells that can respond to hair follicle morphogenetic signals in vivo. Here ...

Nature Research2020

Tip connector for fluidic and electrical connection

Philippe Renaud, Yann Barrandon, David Vincent Bonzon, David Forchelet, Jean-Baptiste Bureau, Georges Muller, Nicolas Uffer

A connector for providing both a fluidic and electrical connection is disclosed, said connector having a proximal end, a distal end and an elongated body in between, characterized in that the elongated body has an inner cavity spanning throughout its lengt ...

2018

Methods of derivation and/or propagation of epithelial cells

Yann Barrandon, Andrea Zaffalon

The present invention relates to methods of derivation and/or propagation of epithelial cells from tissue comprising culturing said tissue in media containing an effective amount of a proprotein convertase inhibitor for a period of time allowing the deriva ...

2018

Sensing Tip with Electrical Impedance Sensor

Philippe Renaud, David Vincent Bonzon, Yann Barrandon

The invention relates to a sensing tip (8) comprising a conventional tip (1), such as a pipette tip, which is essentially made of a cavity which communicates with the external environment through an aperture (3) located at the tip distal end; the sensing t ...

2016

Devices, systems and methods for dispensing and analysing particles

Philippe Renaud, Yann Barrandon, Jean-Baptiste Bureau, David Vincent Bonzon, Steve Béguin

The present invention relates to a pipette tip comprising a thin holed membrane at its distal end, which is designed to be adapted with a system comprising at least an impedance analyser and a fluidic actuator to perform the dispensing and analysis of part ...

2016