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Efficient and reproducible mammalian cell bioprocesses without probes and controllers?

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Transient gene expression (TGE) is a rapid method for the production of recombinant proteins. Recently, valproic acid (VPA), a well known histone deacetylase inhibitor, has been suggested for the use in cell cultures to enhance recombinant protein expressi ...

EPFL2013

Reduced glutamine concentration improves protein production in growth-arrested CHO-DG44 and HEK-293E cells

Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Yashas Rajendra, Divor Kiseljak

For most cultivated mammalian cells, glutamine is an essential medium component. However, glutamine consumption results in the production of ammonia, a cytotoxic byproduct. Here we investigated the effect of glutamine reduction on recombinant protein produ ...

Springer Netherlands2012

Manufacturing recombinant proteins in kg-ton quantities using animal cells in bioreactors

Florian Maria Wurm

Mammalian cells in bioreactors as production host are the focus of this review. We wish to briefly describe today's technical status and to highlight emerging trends in the manufacture of recombinant therapeutic proteins, focusing on Chinese hamster ovary ...

Elsevier2011

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Generating stable, high-producing mammalian cell lines is a major bottleneck in the manufacture of recombinant therapeutic proteins. Conventional gene transfer methods for cell line generation rely on random plasmid integration, resulting in unpredictable ...

Wiley-Blackwell2011

Most of the biopharmaceuticals nowadays are produced by animal cells. The worldwide demand for a specific group of biopharmaceuticals, the monoclonal antibodies (mAbs), has significantly increased this last decade. The mAbs are used as therapeutics in part ...

EPFL2011

Large-Scale Transfection of Mammalian Cells

Florian Maria Wurm, David Hacker, Lucia Baldi Unser, Carine Meerschman

The large-scale transfection of mammalian cells allows moderate (milligram to gram) amounts of recombinant proteins (r-proteins) to be obtained for fundamental or clinical research. In this article, we describe a one-liter transfection using polyethyleneim ...

Humana Press2011

Recombinant cell line generation by standard transfection techniques is a time-consuming and labor-intensive process often leading to an unpredictable outcome as transgene integration is a rare, random event. Consequently, the population of cells obtained ...

EPFL2010

Transient Gene Expression in HEK-293E Cells for Recombinant Protein Production

Sophie Nallet

The growing demand of biopharmaceutical products is boosting the market for therapeutic recombinant proteins (r-proteins). More than half of the 140 r-proteins that have gained approval for human therapeutic use are manufactured in mammalian cells that mak ...

EPFL2010

25 years of recombinant proteins from reactor-grown cells — Where do we go from here?

Florian Maria Wurm, David Hacker

The purpose of this review is to describe the current status and to highlight several emerging trends in the manufacture of recombinant therapeutic proteins in cultivated mammalian cells. focusing on Chinese hamster ovary cells as the major production host ...

Elsevier2009

Transient recombinant protein expression in mammalian cells

Sarah Wulhfard

Transient gene expression (TGE) is a rapid method for generating recombinant proteins in mammalian cells, but the volumetric productivities for secreted proteins in transiently transfected CHO DG44 cells are typically more than an order of magnitude lower ...

EPFL2009