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Updated: May 11, 2026

Genetic Encoding of a Non-Canonical Amino Acid for the Generation of Antibody-Drug Conjugates Through a Fast Bioorthogonal Reaction
Published on: September 14, 2018
PK assays for antibody-drug conjugates: case study with ado-trastuzumab emtansine
Randall Dere1, Joo-Hee Yi, Corinna Lei
1Department of Bioanalytical Sciences, Genentech, 1 DNA Way, South San Francisco, CA 94080-4990, USA. dere.randall@gene.com
Background:
Antibody-drug conjugates (ADCs) combine the characteristics of large-molecule biologics and small-molecule drugs and are heterogeneous mixtures that can biotransform in vivo, resulting in additional complexity. ADC bioanalytical strategies require novel analytical methods, as well as existing large- and small-molecule methods. Because ADCs in late-stage clinical development are relatively new, regulatory guidelines and standard industry best practices for developing strategies for bioanalytical PK assays are still being established.
Results:
A PK assay strategy was developed that included comprehensive novel reagent and assay characterization approaches for the ADC ado-trastuzumab emtansine (T-DM1).
Conclusion:
The bioanalytical strategy was successfully applied to the drug development of T-DM1 and ensured that key analytes were accurately measured in support of nonclinical and clinical development.

