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Nanoscale Topography and Chemistry Affect Embryonic Stem Cell Self-Renewal and Early Differentiation

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In vitro modeling of complex microenvironmental regulation of stem cells

Yoji Tabata

Although stem cells hold tremendous potential for clinical applications, their in vitro manipulation remains very challenging. In vivo, stem cells reside in intricate 3D microenvironments, termed niche, in which many local and systemic extrinsic factors ar ...

EPFL2017

A genetic framework controlling the differentiation of intestinal stem cells during regeneration in Drosophila

Bruno Lemaitre, Jean Philippe Boquete, Zongzhao Zhai

The speed of stem cell differentiation has to be properly coupled with self-renewal, both under basal conditions for tissue maintenance and during regeneration for tissue repair. Using the Drosophila midgut model, we analyze at the cellular and molecular l ...

2017

Stem cell niche engineering through photopatterning and microfluidics

Laura Kolb

The application of stem cells in drug screening and regenerative therapy has led to important advances in basic biology and biomedicine. Such strategies require high cell numbers and the efficient maturation into faithful functional organ or tissue units. ...

EPFL2016

STEM study of Li4Ti5O12 anode material modified with Ag nanoparticles

Marco Cantoni, Malgorzata Maria Michalska, Mariusz Andrzejczuk

Comprehensive scanning transmission electron microscopy (STEM) analysis of Li4Ti5O12 (LTO) powder modified by deposited Ag nanoparticles was performed. Nanocomposite powders with Ag content of 1 wt.%, 4 wt.%, 10 wt.% were fabricated in a chemical process f ...

Wiley-Blackwell2016

Bioengineering approaches to emulate the stem cell niche

Sylke Höhnel

Stem cell therapies hold tremendous potential for tissue and organ regeneration. Yet, there remains significant need for better ex vivo culture and manipulation methods. On the one hand, many tissue-specific stem cells cannot be propagated without causing ...

EPFL2015

Microfluidic engineering of artificial stem cell niches

Simone Allazetta

Stem cells play a key role in a wide range of biological processes, in large part due to their ability to self-renew or differentiate into specialized cell types in response to various biological cues. In vivo, stem cells reside in a complex microenvironme ...

EPFL2015

Bmi1 regulates murine intestinal stem cell proliferation and self-renewal downstream of Notch

Freddy Radtke, Luca Pellegrinet

Genetic data indicate that abrogation of Notch-Rbpj or Wnt-beta-catenin pathways results in the loss of the intestinal stem cells (ISCs). However, whether the effect of Notch is direct or due to the aberrant differentiation of the transit-amplifying cells ...

Company of Biologists2015

In vitro Fate Mapping of Single Hematopoietic Stem Cells

Aline Roch

The in vitro expansion of hematopoietic stem cells (HSC) for clinical applications is hampered by a rapid loss of HSC blood reconstitution capability in culture. While these rare cells can be stimulated to massively proliferate, cell divisions mostly resul ...

EPFL2014

A cell engineering strategy to enhance the safety of stem cell therapies

Elisa Oricchio

The long-term risk of malignancy associated with stem cell therapies is a significant concern in the clinical application of this exciting technology. We report a cancer-selective strategy to enhance the safety of stem cell therapies. Briefly, using a cell ...

Elsevier2014

Stem cells living with a Notch

Freddy Radtke, Ute Koch, Rajwinder Lehal

Notch signaling has been shown over the past few decades to play fundamental roles in a plethora of developmental processes in an evolutionarily conserved fashion. Notch-mediated cell-to-cell signaling is involved in many aspects of embryonic development a ...

Company of Biologists2013