1. Academic Validation
  2. Design, Synthesis, and In Vitro and In Vivo Evaluation of Cereblon Binding Bruton's Tyrosine Kinase (BTK) Degrader CD79b Targeted Antibody-Drug Conjugates

Design, Synthesis, and In Vitro and In Vivo Evaluation of Cereblon Binding Bruton's Tyrosine Kinase (BTK) Degrader CD79b Targeted Antibody-Drug Conjugates

  • Bioconjug Chem. 2024 Feb 21;35(2):140-146. doi: 10.1021/acs.bioconjchem.3c00535.
Alan Zhang 1 Katherine Seiss 2 Laurent Laborde 3 Sebastian Palacio-Ramirez 4 Daniel Guthy 3 Mylene Lanter 3 Julien Lorber 5 Anna Vulpetti 5 Luca Arista 5 Thomas Zoller 5 Thomas Radimerski 3 Claudio Thoma 3 Christina Hebach 3 William R Tschantz 4 Alexei Karpov 5 Gregory J Hollingworth 5 Joseph A D'Alessio 2 Stephane Ferretti 3 Matthew T Burger 1
Affiliations

Affiliations

  • 1 Global Discovery Chemistry, Novartis Biomedical Research, Cambridge, Massachusetts 02139 United States.
  • 2 Oncology Biotherapeutics, Novartis Biomedical Research, Cambridge, Massachusetts 02139 United States.
  • 3 Oncology, Novartis Biomedical Research, CH-4002 Basel, Switzerland.
  • 4 Novartis Biologics Center, Novartis Biomedical Research, Cambridge, Massachusetts 02139 United States.
  • 5 Global Discovery Chemistry, Novartis Biomedical Research, CH-4002 Basel, Switzerland.
Abstract

Antibody-drug conjugates (ADCs) are an established modality that allow for targeted delivery of a potent molecule, or payload, to a desired site of action. ADCs, wherein the payload is a targeted protein degrader, are an emerging area in the field. Herein we describe our efforts of delivering a Bruton's tyrosine kinase (Btk) bifunctional degrader 1 via a CD79b mAb (monoclonal antibody) where the degrader is linked at the Ligase binding portion of the payload via a Cleavable Linker to the mAb. The resulting CD79b ADCs, 3 and 4, exhibit in vitro degradation and cytotoxicity comparable with that of 1, and ADC 3 can achieve more sustained in vivo degradation than intravenously administered 1 with markedly reduced systemic exposure of the payload.

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