Core Insights - Cardiff Oncology, Inc. announced positive results from a Phase 1b clinical trial evaluating onvansertib in combination with paclitaxel for metastatic triple-negative breast cancer (mTNBC), showing a 40% objective response rate [1][2][5] - The trial demonstrated that the combination was well-tolerated with a manageable toxicity profile, primarily myelosuppression being the most common adverse event [5] Company Overview - Cardiff Oncology is a clinical-stage biotechnology company focused on developing novel therapies leveraging PLK1 inhibition across various cancers, with onvansertib as its lead asset [4] - The company is also exploring onvansertib in combination with standard of care treatments for other indications, including RAS-mutated metastatic colorectal cancer, metastatic pancreatic ductal adenocarcinoma, and small cell lung cancer [4] Clinical Trial Details - The Phase 1b trial was led by Antonio Giordano, MD, PhD, at Dana-Farber Cancer Institute, focusing on the safety, pharmacokinetics, and pharmacodynamics of the drug combination [5] - The study's primary endpoint was to assess safety and determine the recommended Phase 2 dose (RP2D), with secondary endpoints including pharmacokinetics and pharmacodynamics [5] - Patients in the trial had a median of 3 prior lines of chemotherapy, and the highest dose of onvansertib (18 mg/m²) resulted in a 40% objective response rate [5]