Publications by Yann Barrandon

Related publications (41)

Oligopotent stem cells are distributed throughout the mammalian ocular surface

Yann Barrandon, Ariane Rochat, Georges Abou Jaoudé

The integrity of the cornea, the most anterior part of the eye, is indispensable for vision. Forty- five million individuals worldwide are bilaterally blind and another 135 million have severely impaired vision in both eyes because of loss of corneal trans ...

2008

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

Gian-Filippo Mancini, Agnès Hautier, 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

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

Christèle Gonneau, Yann Barrandon, Ariane Rochat, Paola Bonfanti, Stéphanie Claudinot

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

Control of thrombin signaling through PI3K is a mechanism underlying plasticity between hair follicle dermal sheath and papilla cells

Yann Barrandon

In hair follicles, dermal papilla (DP) and dermal sheath (DS) cells exhibit striking levels of plasticity, as each can regenerate both cell types. Here, we show that thrombin induces a phosphoinositide 3-kinase (PI3K)-Akt pathway-dependent acquisition of D ...

Company of Biologists2008

The MRL mouse repairs both cryogenic and ischemic myocardial infarcts with scar

Yann Barrandon, Lukas Kappenberger, Hans-Anton Lehr

Objective: The MRL mouse strain shows extraordinary wound healing capacities. Some years ago, Leferovich et al. (Proc Natl Acad Sci U. S. A. 2001;98:9830-35) have reported the absence of scar formation after cryogenically-induced right ventricular myocardi ...

Elsevier2008

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

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

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

Microenvironmental reprogramming of thymic epithelial cells to skin multipotent stem cells

Yann Barrandon, Stéphanie Claudinot, Paola Bonfanti, Alessandro Wataru Amici

The thymus develops from the third pharyngeal pouch of the anterior gut and provides the necessary environment for thymopoiesis (the process by which thymocytes differentiate into mature T lymphocytes) and the establishment and maintenance of self-toleranc ...

2010

Chronic inflammation imposes aberrant cell fate in regenerating epithelia through mechanotransduction

Matthias Lütolf, Freddy Radtke, Georg Fantner, Yann Barrandon, Pascal Damian Odermatt, Craig Nowell, Sylke Höhnel

Chronic inflammation is associated with a variety of pathological conditions in epithelial tissues, including cancer, metaplasia and aberrant wound healing. In relation to this, a significant body of evidence suggests that aberration of epithelial stem and ...

Nature Publishing Group2016

Two-dimensional impedance imaging of cell migration and epithelial stratification

Philippe Renaud, Yann Barrandon, Thomas Michael Braschler, Olof Pontus Linderholm, Jonas Vannod

We present a miniaturized impedance imaging system, developed for 2D imaging of cell and tissue culture. The system is based on 16 microelectrodes (5 µm × 4 mm). An equivalent circuit for four-point (tetrapolar) impedance spectra was developed and validate ...

2006

Corneal Endothelial Cell Fate Is Maintained by LGR5 Through the Regulation of Hedgehog and Wnt Pathway

Yann Barrandon

Leucine-rich repeat-containing G protein-coupled receptor 5 (LGR5), a target of Wnt signaling, is reportedly a marker of intestine, stomach, and hair follicle stem cells in mice. To gain a novel insight into the role of LGR5 in human corneal tissue, we per ...

Wiley-Blackwell2013

Traceable Impedance-Based Dispensing and Cloning of Living Single Cells

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

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

Device for application of medium to human tissue or animal body such as eye, has carrier which is provided with micro-cavity for containing medium in direct contact with object on which medium is to be applied

Philippe Renaud, Hubert van den Bergh, Yann Barrandon, Thomas Michael Braschler, Julien Graber

NOVELTY - The device has a carrier (1) which is provided with micro-cavity (2) for containing medium in direct contact with the object on which the medium is to be applied. Other carrier is provided with ring to protect the medium from environment when the ...

2013

Capturing epidermal stemness for regenerative medicine

Yann Barrandon, Ariane Rochat, François Gorostidi, Stéphanie Claudinot, Andrea Zaffalon, Stéphanie Danièle Hélène Droz-Georget, Nicolas Grasset

The skin is privileged because several skin-derived stem cells (epithelial stem cells from epidermis and its appendages, mesenchymal stem cells from dermis and subcutis, melanocyte stem cells) can be efficiently captured for therapeutic use. Main indicatio ...

Academic Press Ltd- Elsevier Science Ltd2012

Actin filament dynamics impacts keratinocyte stem cell maintenance

Yann Barrandon

Cultured human epidermal keratinocyte stem cells (holoclones) are crucial for regenerative medicine for burns and genetic disorders. In serial culture, holoclones progressively lose their proliferative capacity to become transient amplifying cells with lim ...

Wiley Open Access2013

Notch1 is essential for postnatal hair follicle development and homeostasis

Freddy Radtke, Yann Barrandon

Notch genes encode evolutionarily conserved large, single transmembrane receptors, which regulate many cell fate decisions and differentiation processes during fetal and postnatal life. Multiple Notch receptors and ligands are expressed in both developing ...

2005

Wound repair and regeneration

Yann Barrandon

The repair of wounds is one of the most complex biological processes that occur during human life. After an injury, multiple biological pathways immediately become activated and are synchronized to respond. In human adults, the wound repair process commonl ...

2008

Bipolar resistivity profiling of 3D tissue culture

Philippe Renaud, Yann Barrandon, Olof Pontus Linderholm, Jonas Vannod

We describe a new low-cost technique for continuous monitoring of the thickness of biofilms and tissue cultures, and we demonstrate the advantage of using electrodes of different dimensions to probe different depths of a sample. We have used electric imped ...

Elsevier2007

Target of rapamycin modulators of and use thereof

Yann Barrandon, Fahd Azzabi Zouraq

The present invention is related to new molecules capable of interacting with target of rapamycin (TOR) transcriptional complex. In particular, the present invention provides novel nucleic acid molecules, processes for production thereof, kits containing t ...

2009

Hes1 regulates corneal development and the function of corneal epithelial stem/progenitor cells

Yann Barrandon

Hes1, a major target gene in Notch signaling, regulates the fate and differentiation of various cell types in many developmental systems. To gain a novel insight into the role of Hes1 in corneal tissue, we performed gain-of-function and loss-of-function st ...

2008

Impedance-Based Single-Cell Pipetting

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