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Walter, J.D.* ; Beffinger, M.* ; Egloff, P.* ; Zimmermann, I.* ; Hürlimann, L.M.* ; Ackle, F.* ; Seifert, M.* ; Kobold, S. ; vom Berg, J.* ; Seeger, M.A.*

Flycodes enable simultaneous preclinical analysis for dozens of antibodies in single cassette-dosed mice.

Proc. Natl. Acad. Sci. U.S.A. 122:e2426481122 (2025)
Verlagsversion Forschungsdaten DOI PMC
Open Access Hybrid
Creative Commons Lizenzvertrag
Protein therapeutics such as antibodies require in-depth in vivo characterization during development and consequently account for a large proportion of laboratory animal consumption in the pharmaceutical industry. Currently, antibody candidates are exhaustively tested one-by-one in animal models to determine pharmacokinetic and pharmacodynamic (PK/PD) profiles. The simultaneous analysis of antibody mixtures in single animals, called cassette-dosing, could in principle overcome this bottleneck, but is currently limited to small cassette sizes. Here, we demonstrate how the use of genetically encoded peptide tags (flycodes), designed for maximal detectability in liquid chromatography-mass spectrometry, can allow for the simultaneous characterization of large pools of drug candidates, from single cassette-dosed mice. We demonstrate the simultaneous assessment of PK parameters for a group of >20 marketed/development-stage antibodies. Biodistribution experiments in mice bearing EGFR-expressing tumors correctly identified the two pool members recognizing EGFR, while organ analysis registered liver accumulation of an antibody targeting glucagon receptor, a protein profoundly expressed in that organ. In analogy to an early-phase drug development campaign, we performed biophysical and PK analysis for a cassette of 80 unique bispecific DARPin-sybody molecules. The data shown in this study originate from only 18 cassette-dosed mice, thereby demonstrating how flycode technology efficiently advances preclinical discovery pipelines allowing a direct comparison of drug candidates under identical experimental conditions.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Antibodies ; Cassette Dosing ; Flycodes ; Mass Spectrometry ; Sybodies
Sprache englisch
Veröffentlichungsjahr 2025
HGF-Berichtsjahr 2025
ISSN (print) / ISBN 0027-8424
e-ISSN 1091-6490
Quellenangaben Band: 122, Heft: 12, Seiten: , Artikelnummer: e2426481122 Supplement: ,
Verlag National Academy of Sciences
Begutachtungsstatus Peer reviewed
Institut(e) Unit for Clinical Pharmacology (KKG-EKLiP)
POF Topic(s) 30203 - Molecular Targets and Therapies
Forschungsfeld(er) Immune Response and Infection
PSP-Element(e) G-522100-001
PubMed ID 40096612
Erfassungsdatum 2025-05-07