Invenra highlights Exelixis initiating dose-escalation stage of XB010 trial

Invenra’s collaboration partner, Exelixis announced 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. XB010, an antibody-drug conjugate 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.