Study of the CHK1 Inhibitor BBI-355, an EcDNA-directed Therapy (ecDTx), in Subjects with Tumors with Oncogene Amplifications

Open to people ages 18 years and up

• Locally advanced or metastatic non-resectable solid tumors, whose disease has progressed despite all standard therapies or for whom no further standard or clinically acceptable therapy exists,
• Single agent arm: Evidence of oncogene amplification,
• BBI-355 combination with erlotinib arm: Evidence of amplification of wildtype EGFR,
• BBI-355 combination with futibatinib arm: Evidence of amplification of wildtype FGFR1, FGFR2, FGFR3, or FGFR4,
• Availability of FFPE tumor tissue, archival or newly obtained,
• Measurable disease as defined by RECIST Version 1.1,
• Adequate hematologic function,
• Adequate hepatic and renal function,
• Eastern Cooperative Oncology Group performance status (ECOG PS) 0 or 1,
• Other inclusion criteria per study protocol.

• Well-known tumor activating oncogene mutations or fusions,
• Prior exposure to CHK1 inhibitors,
• BBI-355 combination with erlotinib arm: Prior exposure to EGFR inhibitors,
• BBI-355 combination with futibatinib arm: Prior exposure to FGFR inhibitors,
• Hematologic malignancies,
• Primary CNS malignancy, leptomeningeal disease, or symptomatic active CNS metastases, with exceptions per study protocol,
• Prior or concurrent malignancies, with exceptions per study protocol,
• History of HBV, HCV, or HIV infection,
• Clinically significant cardiac condition,
• Active or history of interstitial lung disease (ILD) or pneumonitis, or history of ILD or pneumonitis requiring steroids or other immunosuppressive medications,
• QTcF > 470 msec,
• Prior organ allograft transplantations or allogeneic peripheral blood stem cell/bone marrow transplantation,
• Other exclusion criteria per study protocol.