Stage IIIA Breast Cancer Clinical Trial
Official title:
T-Cell Immune Checkpoint Inhibition Plus Hypomethylation for Locally Advanced HER2-Negative Breast Cancer - A Phase 2 Neoadjuvant Window Trial of Pembrolizumab and Decitabine Followed by Standard Neoadjuvant Chemotherapy
This study is a 2-cohort, open-label, multicenter, phase 2 study of a short course of immunotherapy consisting of sequential decitabine followed by pembrolizumab administered prior to a standard neoadjuvant chemotherapy regimen for patients with locally advanced HER2-negative breast cancer. The primary efficacy objective is to determine if the immunotherapy increases the presence and percentage of tumor and/or stromal area of infiltrating lymphocytes prior to initiation of standard neoadjuvant chemotherapy. At enrollment, patients will be assigned to one of 2 cohorts based on hormone receptor status. - Cohort A - patients with HER2-negative, hormone receptor-negative breast cancer (defined as both ER and PgR with < 10% positive staining on IHC) Note: before beginning standard neoadjuvant chemotherapy, patients in Cohort A may be reassigned to Cohort A2 to receive extended pembrolizumab as part of new standard neoadjuvant and postoperative adjuvant therapy. - Cohort B - patients with HER2-negative, hormone receptor-positive breast cancer (defined as either ER or PgR with ≥ 10% positive staining on IHC)
Both cohorts will receive the identical doses and treatment schedules of decitabine and pembrolizumab followed by a standard neoadjuvant chemotherapy regimen. Both cohorts will receive 4 cycles of AC and 12 doses of weekly paclitaxel or Nab-paclitaxel. Paclitaxel or Nab-paclitaxel will be combined with carboplatin for Cohorts A and A2 (TNBC). The sequence of the 2 regimens will be at the discretion of the treating medical oncologist following the safety lead-in phase. For the primary endpoint, Cohorts A and A2 will be evaluated together, separate from Cohort B. ;
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