Cited by 327Viral Infectious Diseases and Gene Expression in InsectsMonoclonal and Polyclonal Antibodies ResearchGlycosylation and Glycoproteins Research

Expression of GnTIII in a recombinant anti‐CD20 CHO production cell line: Expression of antibodies with altered glycoforms leads to an increase in ADCC through higher affinity for FCγRIII

Davies, Julian, Jiang, LiYing, Pan, Li‐Zhen, LaBarre, Michael J., Anderson, Darrell, Reff, Mitchell·2001·Biotechnology and Bioengineering

Abstract

The gene encoding the rat glycosylation enzyme β1–4‐N‐acetylglucosaminyltransferase III (GnTIII) was cloned and coexpressed in a recombinant production Chinese hamster ovary (CHO) cell line expressing a chimeric mouse/human anti‐CD20 IgG1 antibody. The new cell lines expressed high levels of antibody and have growth kinetics similar to that of the parent. Relative QPCR showed the cell lines to express varying levels of mRNA. High‐performance liquid chromatography (HPLC) analysis showed the enzyme to have added bisecting N‐acetylglucosamine (GlcNAc) residues in most (48% to 71%) of the N‐linked oligosaccharides isolated from antibody preparations purified from the cell lines. In an ADCC assay the new antibody preparations promoted killing of CD20‐positive target cells at approximately 10‐ to 20‐fold lower concentrations than the parent. This activity was blocked using an anti‐FcγRIII antibody, supporting the role of FcγRIII binding in this increase. In addition, cell binding assays showed the modified antibody bound better to FcγRIII‐expressing cells. The increase in ADCC activity is therefore likely due to an increased affinity of the modified antibody for the FcγRIII receptor. © 2001 John Wiley & Sons, Inc. Biotechnol Bioeng 74: 288–294, 2001.

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  • Since expression of GnTIII blocks fucosylation, CHO cells were engineered with both GnTIII and Golgi mannosidase II (ManII) for IgG production.

    “Since expression of the β1,4-mannosyl-glycoprotein 4-β-N-acetylglucosaminyltransferase III (GnTIII) blocks fucosylation, CHO cells were engineered with both GnTIII and Golgi mannosidase II (ManII) for IgG production (Davies et al., 2001;Ferrara et al., 2006).”

    From Therapeutic glycoprotein production in mammalian cells (2017) · cites this paper as Davies et al., 2001

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Authors
Davies, J., Jiang, L., Pan, L., LaBarre, M. J., Anderson, D., & Reff, M.
Corresponding author
Reff, Mitchell
Venue
Biotechnology and Bioengineering
Publisher
Wiley
Published
2001-06-06
Volume
74
Issue
4
Pages
288-294
ISSN
  • 0006-3592 (ISSN-L)
  • 1097-0290
OpenAlex
W2059347528
Cited by
327
References
14
Citations by year
2026: 4 · 2025: 11 · 2024: 11 · 2023: 8 · 2022: 13 · 2021: 14 · 2020: 12 · 2019: 14 · 2018: 18 · 2017: 17 · 2016: 21 · 2015: 13 · 2014: 17 · 2013: 20 · 2012: 18
FWCI
2.56
Type
journal article
Language
en
Open access
closed
Locations
  • Biotechnology and Bioengineering (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Viral Infectious Diseases and Gene Expression in Insects
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Glycosylation and Glycoproteins Research
Keywords
anti-CD20 monoclonal antibody, antibody glycosylation, bisecting N-acetylglucosamine, N-glycans, antibody-drug conjugates, antibody-dependent cellular cytotoxicity, FcγRIII, CHO cell expression
MeSH terms
Animals, Antibodies, Monoclonal, Antibody-Dependent Cell Cytotoxicity, Carbohydrate Sequence, Cell Division, Chromatography, High Pressure Liquid, Cloning, Molecular, Enzyme-Linked Immunosorbent Assay, Genetic Engineering, Glycosylation, Cricetinae, Immunoglobulin G, Molecular Sequence Data, Recombinant Proteins, RNA, Messenger, CHO Cells, N-Acetylglucosaminyltransferases, Receptors, IgG, Antigens, CD20, Rats

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