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ProBioGen Launches Unique Portfolio of Engineered High-Performance Cell Lines

Published: Monday, November 12, 2012
Last Updated: Monday, November 12, 2012
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Royalty-free biopharmaceutical CHO production cell lines, individually optimized for enhanced ADCC activity, adjusted galactosylation levels and/or increased production of the target antibodies or proteins.

This elaborate cellular toolbox allows the rapid and targeted creation of antibody and protein molecules with specific pre-defined properties.

The cell's fitness for purpose can either be proven via fee-for-service-based demonstration studies at ProBioGen or by providing the cell lines under research licenses to interested parties. The engineered cell lines are royalty-free and are suitable for clinical and commercial production. All engineered cells are based on ProBioGen's biopharmaceutical CHO platform of DG44 and K1 cell lines and can be freely combined with ProBioGen's stable expression vector system and chemically defined media platform.

Besides applying the described permanent cell modifications to newly created cells lines and molecules, all technologies can also be rapidly introduced into existing protein producer cell lines and even into any clients' own expression platforms.

CHO cells with the following modifications are available:

The GlymaxX® technology boosts antibody ADCC activity by preventing the addition of the sugar "fucose" to the N-linked antibody carbohydrate part in antibody-producing cells. The GlymaxX® technology is based on the introduction of a gene for an enzyme which deflects the cellular pathway of fucose biosynthesis. GlymaxX® is universally applicable to different CHO hosts and to any other eukaryotic cell line; it is also simple and potent. It can be applied in a few weeks to any existing antibody producer cell line, or can be included into newly developed cell lines. ProBioGen offers this technology royalty-free to third parties.

The Galactosylation Adjustment Technology is a genetically controlled way to adjust protein galactosylation levels through the additional presence of an enzyme in the producer cells (as opposed to media supplementation to influence galactosylation levels). CHO cells predominantly produce G0 structures (no Galactose molecules).Galactosylation adjustment can increase protein drug galactosylation to almost maximal extent (G2).

The gradual activity of this stably transfected enzyme allows a carefully adjusted or maximized galactosylation of antibodies or proteins. This is desirable e.g. for matching originators galactosylation levels when developing biosimilars, for half-life extension or other reasons.

The Pathway Modulator Technology is highly versatile and readily applicable to any animal cell line and, notably, even to existing producer cell lines, optimizing their productivity. It works through the additional expression of an engineered non-human enzyme in the producer cells. Upon stable transfection, the modulator enzymes' concerted action on several cellular pathways results in substantially enhanced volumetric productivities of protein drugs. For various monoclonal antibodies and fusion proteins tested in CHO, the stable modification increased yields between 1.3 and 2.6-fold.


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