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Publications associées (28)

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Development of high-titer transient gene expression processes for manufacturing recombinant proteins

Gaurav Backliwal

The market for recombinant therapeutic proteins (including antibodies) is estimated to be greater than $50-billion and has a compounded annual growth rate of around 20%. More than 50% of all approved processes for manufacturing recombinant proteins use mam ...

EPFL2008

Recombinant Adeno-Associated viral vectors are deficient in provoking a DNA damage response

Peter Martin Beard

Adeno-associated virus type 2 (AAV2) provokes a DNA damage response that mimics a stalled replication fork. We have previously shown that this response is dependent on ataxia telangiectasia-mutated and Rad3- related kinase and involves recruitment of DNA r ...

American Society for Microbiology2008

Characterization of PEI-coated superparamagnetic iron oxide nanoparticles for transfection: Size distribution, colloidal properties and DNA interaction

Heinrich Hofmann, Alke Fink, Benedikt Steitz

Superparamagnetic iron oxide nanoparticles (SPIONs) were coated with polyethylenimine. Here, we briefly describe the synthesis as well as DNA:PEI:SPION complexes and the characterization of the compounds according to their particle size, zeta-potential, mo ...

2007

Multiple glycerol shocks increase the calcium phosphate transfection of non-synchronized CHO cells

Florian Maria Wurm, David Hacker, Martin Bertschinger, Frédéric Grosjean

The exposure of CHO DG44 cells to an osmotic shock, after DNA uptake, results in a cellular volume decrease of approx. 55%. Repetitive osmotic shocks targeted different sub-populations of cells as was demonstrated using two different fluorescent reporter g ...

2006

Disassembly of polyethylenimine-DNA particles in vitro: implications for polyethylenimine-mediated DNA delivery

Florian Maria Wurm, David Hacker, Martin Jordan, Martin Bertschinger, Gaurav Backliwal

Here a simple in vitro assay was used to investigate the disassembly of nanoparticles of polyethylenimine (PEI) and DNA. Particles were formed with various PEIs, allowed to mature for 10 min, and then exposed to different competitors (RNA, DNA, BSA or hepa ...

2006

Enhancement of the efficiency of non-viral gene delivery by application of pulsed magnetic field

Heinrich Hofmann, Alke Fink, Benedikt Steitz

New approaches to increase the efficiency of non-viral gene delivery are still required. Here we report a simple approach that enhances gene delivery using permanent and pulsating magnetic fields. DNA plasmids and novel DNA fragments (PCR products) contain ...

2006

The use of RNA interference to increase PEI-mediated transient gene expression in mammalian cells

Martin Bertschinger

DNA uptake by polyethylenimine (PEI)-mediated transfection was investigated in Chinese hamster ovary (CHO DG44) cells. Rapid DNA uptake was observed with the maximum occurring during the first 45-60 min after addition of PEI-DNA complexes to cells. With lo ...

EPFL2006

Gene Expression in Synovial Membrane Cells After Intraarticular Delivery of Plasmid-Linked Superparamagnetic Iron Oxide Particles—A Preliminary Study in Sheep

Heinrich Hofmann, Alke Fink, Benedikt Steitz

This study evaluated in vivo gene deliver y and subsequent gene expression within cells of the synovium in the presence of static and pulsating magnetic field application following intraar ticular injection of super paramagnetic iron oxide nanopar ticles l ...

2006