Cited by 75Monoclonal and Polyclonal Antibodies ResearchViral Infectious Diseases and Gene Expression in InsectsProtein purification and stability

Efficient production of bispecific IgG of different isotypes and species of origin in single mammalian cells

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Dillon, Michael, Yin, Yiyuan, Zhou, Jianhui, McCarty, Luke, Ellerman, Diego, Slaga, Dionysos, Junttila, Teemu T., Han, Guanghui +8 more·2017·mAbs

Abstract

Bispecific IgG production in single host cells has been a much sought-after goal to support the clinical development of these complex molecules. Current routes to single cell production of bispecific IgG include engineering heavy chains for heterodimerization and redesign of Fab arms for selective pairing of cognate heavy and light chains. Here, we describe novel designs to facilitate selective Fab arm assembly in conjunction with previously described knobs-into-holes mutations for preferential heavy chain heterodimerization. The top Fab designs for selective pairing, namely variants v10 and v11, support near quantitative assembly of bispecific IgG in single cells for multiple different antibody pairs as judged by high-resolution mass spectrometry. Single-cell and in vitro-assembled bispecific IgG have comparable physical, in vitro biological and in vivo pharmacokinetics properties. Efficient single-cell production of bispecific IgG was demonstrated for human IgG1, IgG2 and IgG4 thereby allowing the heavy chain isotype to be tailored for specific therapeutic applications. Additionally, a reverse chimeric bispecific IgG2a with humanized variable domains and mouse constant domains was generated for preclinical proof-of-concept studies in mice. Efficient production of a bispecific IgG in stably transfected mammalian (CHO) cells was shown. Individual clones with stable titer and bispecific IgG composition for >120 days were readily identified. Such long-term cell line stability is needed for commercial manufacture of bispecific IgG. The single-cell bispecific IgG designs developed here may be broadly applicable to biotechnology research, including screening bispecific IgG panels, and to support clinical development.

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Crossref · 10.1080/19420862.2016.1267089

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  • bsAbs produced from a single host cell through multiple engineering strategies have comparable PK profiles in mice as the in vitro-assembled bispecific IgG.

    “Dillon et al., who showed that bsAbs produced from a single host cell through multiple engineering strategies have comparable PK profiles in mice as the in vitro‐assembled bispecific IgG.90”

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Authors
Dillon, M., Yin, Y., Zhou, J., McCarty, L., Ellerman, D., Slaga, D., Junttila, T. T., Han, G., Sandoval, W., Ovacik, M. A., Lin, K., Hu, Z., Shen, A., Corn, J. E., Spiess, C., & Carter, P. J.
Affiliations
Genentech (US)
Corresponding author
  • Spiess, Christoph
  • Carter, Paul J.
Venue
mAbs
Published
2016-12-08
Volume
9
Issue
2
Pages
213-230
ISSN
  • 1942-0862 (ISSN-L)
  • 1942-0870
OpenAlex
W2560421980
Cited by
75
References
59
Citations by year
2026: 3 · 2025: 7 · 2024: 11 · 2023: 7 · 2022: 5 · 2021: 7 · 2020: 12 · 2019: 9 · 2018: 10 · 2017: 4
FWCI
6.66
Type
journal article
Language
en
Open access
Locations
  • mAbs (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
Genentech
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Viral Infectious Diseases and Gene Expression in Insects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein purification and stability
Keywords
antibody isotypes, humanized monoclonal antibody, CHO cell expression, cell line stability, pharmacokinetics
MeSH terms
Animals, Humans, Immunoglobulin G, Protein Engineering, Antibodies, Bispecific

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