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Stock impact report

Compass Therapeutics to Present Phase 1 Data for CTX-471, A Novel CD137 Agonist Antibody, Demonstrating Anti-Tumor Activity in Patients Who Have Progressed on Approved PD-1 or PD-L1 Inhibi...

Compass Therapeutics, Inc. (CMPX) 
Company Research Source: GlobeNewswire
CTX-471, a novel anti-CD137 agonist antibody, demonstrated anti-tumor activity in the Company’s Phase 1 Dose Escalation and Dose Expansion, first-in-human monotherapy study in patients with metastatic or locally advanced malignancies who had progressed on approved PD-1 or PD-L1 inhibitors.Five clinical responses were observed, all in patients who previously received checkpoint inhibitors. A durable partial response (PR) in a patient with small-cell lung cancer (SCLC) converted to a complete response, as confirmed by PET scan. Four additional PRs were also observed, 3 of 11 (27.3%) patients with melanoma (2 confirmed, one unconfirmed) and one of four (25%) patients with mesothelioma (PR confirmed).CTX-471 was well tolerated. The dose-limiting toxicity in the dose-escalation portion of the study was thrombocytopenia (decreased platelet count). These two episodes both resolved to normal. There was a low incidence of liver toxicity (6.3%), and the majority (80%) of adverse events were low Show less Read more
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