Tesetaxel Plus Reduced Dose of Capecitabine in Patients With HER2 Negative, HR Positive, LA/MBC

CONTESSA 2 is a multinational, multicenter, Phase 2 study of tesetaxel, an investigational, orally administered taxane, in patients with HER2 negative, HR Positive, LA/MBC not previously treated with a taxane in the neoadjuvant, adjuvant or metastatic setting. This Study complements CONTESSA, a multinational, multicenter, randomized, Phase 3 study in patients with HER2 negative, HR positive LA/MBC previously treated with a taxane in the neoadjuvant or adjuvant setting. 152 patients were enrolled, including 149 who received treatment. Patients are administered tesetaxel at 27 mg/m2 orally once every 21 days on the first day of each 21-day cycle plus capecitabine at 825 mg/m2 orally twice daily (for a total daily dose of 1,650 mg/m2) for 14 days of each 21-day cycle. Patients in the dense pharmacokinetics (PK) cohort receive a single dose of capecitabine monotherapy prior to starting the combination regimen. Capecitabine is an oral chemotherapy agent that is considered a standard-of-care treatment in LA/MBC. The primary efficacy endpoint is ORR as assessed by the IRC. The secondary efficacy endpoints are duration of response (DoR) as assessed by the IRC, progression-free survival (PFS) as assessed by the IRC, disease control rate (DCR) as assessed by the IRC and overall survival (OS). CONTESSA 2 also investigates the PK of tesetaxel.