Article ; Online: Development of a Novel DNA Mono-alkylator Platform for Antibody-Drug Conjugates.
2024 Volume 23, Issue 4, Page(s) 541–551
Abstract: Although microtubule inhibitors (MTI) remain a therapeutically valuable payload option for antibody-drug conjugates (ADC), some cancers do not respond to MTI-based ADCs. Efforts to fill this therapeutic gap have led to a recent expansion of the ADC ... ...
Abstract | Although microtubule inhibitors (MTI) remain a therapeutically valuable payload option for antibody-drug conjugates (ADC), some cancers do not respond to MTI-based ADCs. Efforts to fill this therapeutic gap have led to a recent expansion of the ADC payload "toolbox" to include payloads with novel mechanisms of action such as topoisomerase inhibition and DNA cross-linking. We present here the development of a novel DNA mono-alkylator ADC platform that exhibits sustained tumor growth suppression at single doses in MTI-resistant tumors and is well tolerated in the rat upon repeat dosing. A phosphoramidate prodrug of the payload enables low ADC aggregation even at drug-to-antibody ratios of 5:1 while still delivering a bystander-capable payload that is effective in multidrug resistant (MDR)-overexpressing cell lines. The platform was comparable in xenograft studies to the clinical benchmark DNA mono-alkylator ADC platform DGN459 but with a significantly better tolerability profile in rats. Thus, the activity and tolerability profile of this new platform make it a viable option for the development of ADCs. |
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MeSH term(s) | Humans ; Rats ; Animals ; Immunoconjugates/pharmacology ; Immunoconjugates/therapeutic use ; Alkylating Agents ; Neoplasms/drug therapy ; DNA/metabolism ; Cell Line, Tumor ; Antineoplastic Agents/pharmacology |
Chemical Substances | Immunoconjugates ; Alkylating Agents ; DNA (9007-49-2) ; Antineoplastic Agents |
Language | English |
Publishing date | 2024-02-14 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 2063563-1 |
ISSN | 1538-8514 ; 1535-7163 |
ISSN (online) | 1538-8514 |
ISSN | 1535-7163 |
DOI | 10.1158/1535-7163.MCT-23-0622 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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