First Mesothelioma Patient Dosed in CA-170 Study

Curis announced the first mesothelioma patient has been enrolled and dosed in the Phase I study of CA-170. CA-170 is an orally available, dual inhibitor of VISTA and PDL1, which the company believes could provide benefit in tumors with high levels of VISTA expression. Over 90% of mesothelioma cells express VISTA.

The company had previously announced its expectation to begin enrollment of mesothelioma patients in a dedicated cohort within the existing Phase 1 study.

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"We are pleased to announce that the CA-170 study has begun dosing patients ahead of schedule," said James Dentzer, President & CEO of Curis. "On last quarter's earnings call, we outlined the reorganization of company resources to strengthen focus on clinical execution. Today's announcement is a result of those efforts. We re-iterate our confidence in our expectation to report initial efficacy data in this study in the second half of 2019."

CA-170 is the only anti-VISTA therapeutic currently being studied in a clinical trial. CA-170 has demonstrated favorable safety and tolerability, as well as preliminary anti-tumor activity in patients across multiple tumor types. The Phase I study is the first clinical trial of CA-170 to specifically target a patient population characterized by high levels of VISTA expression.

The Phase I, open-label, dose escalation and dose expansion trial evaluating the safety, pharmacokinetics, pharmacodynamics, and clinical effects of orally administered CA-170 in patients with advanced tumors and lymphomas. The dedicated mesothelioma cohort will evaluate CA-170 at two dose levels.

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