On August 7, 2024 Invenra’s collaboration partner, Exelixis, Inc. (NASDAQ: EXEL) reported the initiation of the dose-escalation stage of the first-in-human phase 1 clinical trial of XB010 in patients with locally advanced or metastatic solid tumors (Press release, Invenra, AUG 7, 2024, View Source [SID1234645519]).

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XB010, an antibody-drug conjugate (ADC) consisting of a monomethyl auristatin E payload conjugated to a monoclonal antibody targeting the tumor antigen 5T4, is the first custom ADC generated through Exelixis’ biotherapeutics collaboration network. XB010 was constructed using Catalent’s SMARTag site-specific bioconjugation platform, and its 5T4-targeting mAb was discovered in collaboration with Invenra.

Exelixis further announced that the dose-escalation stage of their phase 1, global, open-label study will evaluate XB010 as a single agent and in combination with pembrolizumab to inform the cohort-expansion stage. The expansion cohorts are designed to further assess the tolerability and activity of monotherapy and of the combination in specific indications.