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Frontiers in immunology2022; 13; 942317; doi: 10.3389/fimmu.2022.942317

Centaur antibodies: Engineered chimeric equine-human recombinant antibodies.

Abstract: Hyper-immune antisera from large mammals, in particular horses, are routinely used for life-saving anti-intoxication intervention. While highly efficient, the use of these immunotherapeutics is complicated by possible recipient reactogenicity and limited availability. Accordingly, there is an urgent need for alternative improved next-generation immunotherapies to respond to this issue of high public health priority. Here, we document the development of previously unavailable tools for equine antibody engineering. A novel primer set, EquPD v2020, based on equine V-gene data, was designed for efficient and accurate amplification of rearranged horse antibody V-segments. The primer set served for generation of immune phage display libraries, representing highly diverse V-gene repertoires of horses immunized against botulinum A or B neurotoxins. Highly specific scFv clones were selected and expressed as full-length antibodies, carrying equine V-genes and human Gamma1/Lambda constant genes, to be referred as "Centaur antibodies". Preliminary assessment in a murine model of botulism established their therapeutic potential. The experimental approach detailed in the current report, represents a valuable tool for isolation and engineering of therapeutic equine antibodies.
Publication Date: 2022-08-19 PubMed ID: 36059507PubMed Central: PMC9437483DOI: 10.3389/fimmu.2022.942317Google Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This research article is about the development of new tools for engineering equine antibodies through a method they called “Centaur antibodies.” The antibodies generated showed therapeutic potential in a murine model of botulism, offering an alternative to current immunotherapies made from the anti-sera of large mammals.

Introduction and Motivation

  • This study arises from the need to develop alternative immunotherapies due to the limitations of current therapies created from large mammals’ hyper-immune antisera.
  • The use of these immunotherapeutics, while effective, can lead to recipient reactogenicity and are also constrained by limited availability.
  • Therefore, the research addresses the development of improved, next-generation immunotherapies to mitigate these challenges that are of high public health concern.

Research Methodology

  • The researchers devised a new primer set, named EquPD v2020, based on equine V-gene data.
  • This primer set was designed to enable efficient and accurate amplification of the rearranged horse antibody V-segments.
  • The amplified V-segments were used to create immune phage display libraries representing highly diverse V-gene repertoires of horses immunized against botulinum A or B neurotoxins.
  • From the libraries, the researchers selected and expressed scFv clones as full-length antibodies. These contained equine V-genes and human Gamma1/Lambda constant genes, making them chimeric, or “Centaur,” antibodies.

Findings

  • Tests on a murine model of botulism showed that these Centaur antibodies have therapeutic potential, making them a valuable tool in the field of immunotherapy.
  • This approach opens up new possibilities for producing therapeutic equine antibodies, providing an alternative to current immunotherapies derived from large mammals’ antisera.

Conclusion

  • The approach detailed in this study represents a significant development in the field of antibody engineering.
  • These engineered antibodies could serve as a more readily available and less reactogenic intervention for intoxications that current immunotherapies treat.

Cite This Article

APA
Rosenfeld R, Alcalay R, Zvi A, Ben-David A, Noy-Porat T, Chitlaru T, Epstein E, Israeli O, Lazar S, Caspi N, Barnea A, Dor E, Chomsky I, Pitel S, Makdasi E, Zichel R, Mazor O. (2022). Centaur antibodies: Engineered chimeric equine-human recombinant antibodies. Front Immunol, 13, 942317. https://doi.org/10.3389/fimmu.2022.942317

Publication

ISSN: 1664-3224
NlmUniqueID: 101560960
Country: Switzerland
Language: English
Volume: 13
Pages: 942317
PII: 942317

Researcher Affiliations

Rosenfeld, Ronit
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.
Alcalay, Ron
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.
Zvi, Anat
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.
Ben-David, Alon
  • Department of Biotechnology, Israel Institute for Biological Research, Ness Ziona, Israel.
Noy-Porat, Tal
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.
Chitlaru, Theodor
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.
Epstein, Eyal
  • Department of Biotechnology, Israel Institute for Biological Research, Ness Ziona, Israel.
Israeli, Ofir
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.
Lazar, Shirley
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.
Caspi, Noa
  • Veterinary Center for Preclinical Research, Israel Institute for Biological Research, Ness Ziona, Israel.
Barnea, Ada
  • Department of Biotechnology, Israel Institute for Biological Research, Ness Ziona, Israel.
Dor, Eyal
  • Department of Biotechnology, Israel Institute for Biological Research, Ness Ziona, Israel.
Chomsky, Inbar
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.
Pitel, Shani
  • Department of Biotechnology, Israel Institute for Biological Research, Ness Ziona, Israel.
Makdasi, Efi
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.
Zichel, Ran
  • Department of Biotechnology, Israel Institute for Biological Research, Ness Ziona, Israel.
Mazor, Ohad
  • Department of Biochemistry and Molecular Genetics, Israel Institute for Biological Research, Ness Ziona, Israel.

MeSH Terms

  • Animals
  • Antibodies / genetics
  • Cell Surface Display Techniques
  • Horses
  • Humans
  • Immunoglobulin Variable Region / genetics
  • Mammals
  • Mice
  • Neurotoxins
  • Recombinant Proteins / genetics

Conflict of Interest Statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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Citations

This article has been cited 1 times.
  1. Wibmer CK, Mashilo P. Exploiting V-Gene Bias for Rapid, High-Throughput Monoclonal Antibody Isolation from Horses.. Viruses 2022 Sep 30;14(10).
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