Glycan variability on a recombinant IgG antibody transiently produced in HEK-293E cells

In this study, a recombinant monoclonal IgG antibody was produced by transient gene expression (TGE) in suspension-adapted HEK-293E cells. The objective of the study was to determine the variation in recombinant IgG yield and glycosylation in ten independent transfections. In a ten-day batch process, the variation in transient IgG yield in the ten batches was less than 30% with the specific productivity averaging 20.2 +/- 2.6 pg/cell/day. We characterized the N-glycosylation profile of each batch of affinity-purified IgG by intact protein and bottom-up mass spectrometry. Four major glycans were identified at Asn(297) in the ten batches with the maximum relative deviation for a single glycoform being 2.5%. In addition, within any single transfection there was little variation in glycoforms over the ten-day culture. Our experimental data indicate that with TGE, the production of recombinant IgG with little batch-to-batch variation in volumetric yield and protein glycosylation is feasible, even in a non-instrumented cultivation system as described here.


Published in:
New Biotechnology, 29, 4, 471-476
Year:
2012
Publisher:
Elsevier
ISSN:
1871-6784
Keywords:
Laboratories:




 Record created 2012-05-02, last modified 2018-09-13


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