NCI Drug Dictionary

The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

anti-HER2/auristatin payload antibody-drug conjugate XMT-1522
An antibody-drug conjugate (ADC) composed of HT-19, a monoclonal antibody directed against the human epidermal growth factor receptor 2 (ERBB2; HER2), conjugated, via a proprietary biodegradable, hydrophilic polymer backbone and various linkers, to proprietary auristatin-derived payload molecules (about 15 per antibody), with potential antineoplastic activity. Upon administration of anti-HER2/auristatin payload ADC XMT-1522, the antibody moiety targets and binds to a unique epitope in the extracellular domain (ECD) of HER2. Upon internalization, cleavage and release of the cytotoxic molecules, the auristatin-derived molecules bind to tubulin and inhibit its polymerization, which results in G2/M phase arrest and induces apoptosis of HER2-expressing tumor cells. The attachment of multiple auristatin molecules to the backbone enables XMT-1522 to effectively kill tumors that express relatively low amounts of the HER2 protein; therefore, this agent shows increased therapeutic potential in tumors with low HER2 expression compared to other anti-HER2 antibody-based therapies. The polymer-based proprietary platform optimizes delivery of the cytotoxic drug payload and improves drug solubility. Check for active clinical trials using this agent. (NCI Thesaurus)

Synonym:ADC XMT-1522
anti-HER2 ADC XMT-1522
Code name:XMT-1522