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Carboplatin With or Without Atezolizumab in Treating Patients With Stage IV Triple Negative Breast Cancer

Triple Negative Breast Cancer Clinical Trial

Official title:
A Phase II Trial of Atezolizumab (Anti-PDL1) With Carboplatin in Patients With Metastatic Triple Negative Breast Cancer

Clinical Trial Summary

This randomized phase II trial studies how well carboplatin with or without atezolizumab works in treating patients with stage IV triple negative breast cancer. Drugs used in chemotherapy, such as carboplatin, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Monoclonal antibodies, such as atezolizumab, may interfere with the ability of tumor cells to grow and spread. Giving carboplatin with atezolizumab may work better in treating patients with stage IV triple negative breast cancer

Clinical Trial Description

Primary objective: To evaluate the efficacy, as measured by progression free survival (PFS) of carboplatin + atezolizumab (using irRECIST) versus carboplatin alone (using RECIST) in patients with triple negative metastatic breast cancer Secondary objectives: - To determine overall response rate. - To evaluate the efficacy, as measured by clinical benefit rate, of carboplatin + atezolizumab (using irRECIST) versus carboplatin (using RECIST) alone in patients with triple negative metastatic breast cancer. Clinical benefit rate is defined as complete response plus partial response plus stable disease for 6 months. - To determine the duration of response for patients achieving a partial or complete response. - To evaluate the overall survival (OS) of carboplatin + atezolizumab versus carboplatin alone in patients with triple negative metastatic breast cancer. TERTIARY OBJECTIVES: - To perform the following correlative studies from biopsies taken at baseline: 1. Tumor infiltrating lymphocyte frequency and phenotype (TILs) at baseline 2. PD-L1 expression from the baseline pre-treatment tissue and at progression lesion, performed by IHC (SP142 clone) 3. HER2 (IHC, FISH) and ER/PR levels (IHC) from a metastatic site 4. Perform RNA-seq to determine non-synonymous mutation burden in expressed genes and gene expression to assign a triple negative subtype at baseline for correlations with clinic outcome 5. Immune phenotyping (IHC) for markers of T cell subsets and activation (CD4, CD8, FoxP3, CD25, Glut1) and exhaustion (PD1, CTLA4) and test feasibility of flow cytometric analyses to include additional markers - To assess the effect of BRCA mutations on response to the study drugs - To evaluate the effect of steroids on the efficacy of atezolizumab To assess the prognostic effects of TILs on PFS and CBR in patients receiving atezolizumab ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT03206203
Study type Interventional
Source Vanderbilt-Ingram Cancer Center
Contact
Status Active, not recruiting
Phase Phase 2
Start date August 29, 2017
Completion date November 15, 2024
View Details
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