“We are pleased to enter this supply agreement with Lilly to evaluate the combination of BBI-355 and abemaciclib in patients with ecDNA-driven solid tumors harboring CDK4 or CDK6 amplifications in our ongoing POTENTIATE trial,” said Zachary Hornby, President and Chief Executive Officer of Boundless Bio. “To date, CDK4/6 inhibitors have only been approved in HR+/HER2- breast cancer. Based on preclinical data, we believe BBI-355 has the potential to disable the underlying ecDNA driving oncogene amplification and unlock synergistic anti-tumor activity when combined with abemaciclib, potentially providing an important new treatment option for patients with CDK4 or CDK6 amplified solid tumors.”