Exelixis, Roche to evaluate cabozantinib and atezolizumab in solid tumors

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Exelixis Inc. announced a new collaboration with Roche on a phase Ib dose escalation study that will evaluate the safety and tolerability of cabozantinib, Exelixis’ tyrosine kinase inhibitor, in combination with atezolizumab, Roche’s anti-PD-L1 immunotherapy, in patients with locally advanced or metastatic solid tumors.

Enrollment is scheduled to begin mid-year 2017; Exelixis will be the sponsor of the trial, and Rochewill provide atezolizumab.

Based on the dose-escalation results, the trial has the potential to enroll up to four expansion cohorts, including a cohort of patients with previously untreated advanced clear cell renal cell carcinoma and three cohorts of urothelial carcinoma, namely platinum eligible first-line patients, first- or second-line platinum ineligible patients, and patients previously treated with platinum-containing chemotherapy.

Ipsen, Exelixis’ global partner for cabozantinib, except in the United States and Japan, will participate in this study and have access to the results for potential future development in its territories.

Takeda may also participate in these and future studies and have access to the results to support potential future regulatory submissions in their territories, if they opt into their funding obligations under the respective collaboration agreement.

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