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Optimization of microfluidic single cell trapping for long-term on-chip culture

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Dielectrophoresis (DEP) is a powerful tool to manipulate cells and molecules in microfluidic chips. However, few practical applications using DEP exist. An immediate practical application of a carbon- electrode DEP system, in removing PCR inhibitors from a ...

Elsevier2013

Microtechnologies to Map the Fate of Single Stem Cells and their Progeny

Stefan Kobel

Since stem cells have the unique ability to produce more of themselves (i.e. to "self-renew") and to generate specialized tissue cells, they are an ideal source of cells for regenerative medicine and in vitro tissue models. In order to fully exploit this p ...

EPFL2012

Hydrogel Microfluidics to Control Stem Cell Fate

Steffen Cosson

Biomolecular signaling is of utmost importance in governing many biological processes such as morphogenesis during tissue development where biomolecules regulate key cell-fate decisions. In vivo, these factors are presented in a spatiotemporally tightly co ...

EPFL2012

Highly controlled electrofusion of individually selected cells in dielectrophoretic field cages

Claus Duschl

The prospect of novel therapeutic approaches has renewed the current interest in the fusion of rare cells, like stem cells or primary immune cells. While conventional techniques are only capable of mass fusion, lab-on-a-chip systems often still lack an acc ...

2012

Automated analysis of single stem cells in microfluidic traps

Matthias Lütolf, Alessandra Griffa, Olivier Burri, Arne Seitz, Stefan Kobel, Mukul Girotra

We report a reliable strategy to perform automated image cytometry of single (non-adherent) stem cells captured in microfluidic traps. The method rapidly segments images of an entire microfluidic chip based on the detection of horizontal edges of microflui ...

2012

Single-Cell Analysis of Mycobacterial Persistence Using Microfabricated Tools

Meltem Elitas

Bacterial cells behave as individuals despite being genetically identical and subject to the same environment. Although the underlying mechanisms of cellular individuality are not well understood, temporal variation of gene expression and protein levels in ...

EPFL2012

Optical trapping microrheology in cultured human cells

László Forró, Sylvia Jeney, Elena Bertseva

We present the microrheological study of the two close human epithelial cell lines: non-cancerous HCV29 and cancerous T24. The optical tweezers tracking was applied to extract the several seconds long trajectories of endogenous lipid granules at time step ...

Springer-Verlag2012

Development of a microfluidic on-chip reverse transcription module for the analysis of hematopoietic single stem cells

Viktoria Stepanova

Hematopoietic stem cells (HSCs) have a unique ability to self-renew and produce differentiated progeny throughout the entire life of the human body. However, present clinical use of HSCs in regenerative medicine is largely hindered by our limited understan ...

2011

2D Stem Cell Culture on Microfluidic Generated Hydrogel Beads

Tanja Cloé Hausherr

Stem cells capacity to self-renew and differentiate into specialized cell types, endow them with great promises in regenerative medicine. It is believed that the stem cells microenvironment plays a significant role in regulating their fate. However, with e ...

2011

Biomolecule gradients on surface initiated graft polymers

Ruben Casanova

Controlling the fate of stem cells in vitro is a key challenge towards using these cells in clinical applications. Adult stem cells (ASC) are known to reside in complex microenvironments called niches in vivo. These niches regulate stem cell fate providing ...

2011