Publications de Samy Gobaa | EPFL Graph Search

Artificial niche microarrays for identifying extrinsic cell-fate determinants

The complex cellular microenvironment plays an important role in determining cell fate. For example, stem cells located in a microenvironment termed niche integrate a wide variety of extrinsic cues to take distinct fate choices. Capturing this multiple-inp ...

ELSEVIER ACADEMIC PRESS INC2018

Substrate elasticity modulates the responsiveness of mesenchymal stem cells to commitment cues

Matthias Lütolf, Samy Gobaa

Fate choices of stem cells are regulated in response to a complex array of biochemical and physical signals from their microenvironmental niche. Whereas the molecular composition and the role of mechanical niche cues have been extensively studied, relative ...

Royal Soc Chemistry2015

3D niche microarrays for systems-level analyses of cell fate

Matthias Lütolf, Katarzyna Mosiewicz, Adrian Ranga, Samy Gobaa, Andrea Negro, Yuya Okawa

The behaviour of mammalian cells in a tissue is governed by the three-dimensional (3D) microenvironment and involves a dynamic interplay between biochemical and mechanical signals provided by the extracellular matrix (ECM), cell–cell interactions and solub ...

Nature Publishing Group2014

Live mammalian cell arrays

Matthias Lütolf, Sebastian Maerkl, Samy Gobaa, Luis Miguel Fidalgo Rabanera, Kristina Pan Woodruff

High-content assays have the potential to drastically increase throughput in cell biology and drug discovery, but handling and culturing large libraries of cells such as primary tumor or cancer cell lines requires expensive, dedicated robotic equipment. We ...

Nature Publishing Group2013

Artificial three-dimensional niches deconstruct pancreas development in vitro

Matthias Lütolf, Anne Grapin-Botton, Chiara Greggio, Adrian Ranga, Samy Gobaa, Filippo De Franceschi

In the context of a cellular therapy for diabetes, methods for pancreatic progenitor expansion and subsequent differentiation into insulin-producing beta cells would be extremely valuable. Here we establish three-dimensional culture conditions in Matrigel ...

Company Of Biologists Ltd2013

Method for preparing topographically structured microarrays

Matthias Lütolf, Samy Gobaa

A method for preparing a topographically structured hydrogel microarray is described comprising the steps of a) providing one or more types of biomolecule(s) on top of micropillars of an array of micropillars, preferably by means of robotical spotting, b) ...

2013

Diagnostic microchip to assay 3D colony-growth potential of captured circulating tumor cells

Matthias Lütolf, Stefan Kobel, Samy Gobaa

Microfluidic technology has been successfully applied to isolate very rare tumor-derived epithelial cells (circulating tumor cells, CTCs) from blood with relatively high yield and purity, opening up exciting prospects for early detection of cancer. However ...

2012

Keynote: Deconstructing and reconstructing stem cell niches

Matthias Lütolf, Adrian Ranga, Samy Gobaa

Wiley-Blackwell2012

High-throughput clonal analysis of neural stem cells in microarrayed artificial niches

Matthias Lütolf, Samy Gobaa

To better understand the extrinsic signals that control neural stem cell (NSC) fate, here we applied a microwell array platform which allows high-throughput clonal analyses of NSCs, cultured either as neurospheres or as adherent clones, exposed to poly(eth ...

2012

Artificial niche microarrays for probing single stem cell fate in high throughput

Matthias Lütolf, Stefan Kobel, Samy Gobaa, Andrea Negro

To understand the regulatory role of niches in maintaining stem-cell fate, multifactorial in vitro models are required. These systems should enable analysis of biochemical and biophysical niche effectors in a combinatorial fashion and in the context of a p ...

Nature Publishing Group2011

Micropatterning of Hydrogels by Soft Embossing

Matthias Lütolf, Thierry Laroche, Monika Limacher, Stefan Kobel, Samy Gobaa

Conventional in situ hydrogel micropatterning techniques work successfully for relatively stiff hydrogels, but they often result in locally damaged surfaces upon demolding in the case of soft and fragile polymer networks formed at low precursor concentrati ...

American Chemical Society2009