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The Analytical Scientist / App Notes / 2020 / HPLC Column for quick Evaluation of ADCC Activity

HPLC Column for quick Evaluation of ADCC Activity

04/14/2020

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Tosoh Bioscience introduced TSKgel FcR-IIIA-NPR a new HPLC affinity column based on recombinant FcγIIIa receptor, a key player in antibody-dependent cell-mediated cytotoxicity (ADCC). FcγRIIIa affinity chromatography allows fast evaluation of biologic activity and glycoform patterns of antibodies. This innovative and robust method can provide valuable information during cell line selection, upstream optimization, or quality control of therapeutic antibodies.

Antibody-dependent cell-mediated cytotoxicity (ADCC) is an important mechanism of action (MoA) of monoclonal antibodies used in cancer treatment. Selecting suitable cell lines and optimizing culture conditions towards expression of antibody candidates with desired ADCC activity is an essential part of the R&D process. A fast and straight forward approach to easily access ADCC activity would facilitate screening of a large number of clones or monitoring the effect of upstream process variations. Other stages of R&D and production could benefit from fast ADCC assessment as well: comparing biosimilar and originator, detecting lot-to-lot variations, monitoring product stability, to name but a few.

Fc RECEPTOR AND ADCC ACTIVITY

ADCC starts with the binding of the Fab region of an antibody to a target cell, e.g. a cancer cell. Binding of the Fc domain of that antibody to Fcγ receptors on the outer membrane of natural killer (NK) cells triggers degranulation into a lytic synapse and finally the apoptosis of the cancer cell (Figure 1). The glycan micro-heterogeneity of the Fc domain, in particular on the galactose and core-fucose levels1), influences binding of the Fc domain to Fcγ receptors.

>> Download the Full Application Note as a PDF

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