Journal
BIOCONJUGATE CHEMISTRY
Volume 25, Issue 10, Pages 1871-1880Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bc500357n
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The stability of the connection between the antibody and the toxin can have a profound impact on ADC safety and efficacy. There has been increasing evidence in recent years that maleimide-based ADCs are prone to payload loss via a retro-Michael type reaction. Herein, we report a mild method for the hydrolysis of the succinimide-thioether ring which results in a ring-opened linker. ADCs containing this hydrolyzed succinimide linker show equivalent cytotoxicity, improved in vitro stability, improved PK exposure, and improved efficacy as compared to their nonhydrolyzed counterparts. This method offers a simple way to improve the stability, exposure, and efficacy of maleimide-based ADCs.
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