A Study to Investigate Atezolizumab and Chemotherapy Compared With Placebo and Chemotherapy in the Neoadjuvant Setting in Participants With Early Stage Triple Negative Breast Cancer

Summary

This is a global Phase III, double-blind, randomized, placebo-controlled study designed to evaluate the efficacy and safety of neoadjuvant treatment with atezolizumab (anti-programmed death-ligand 1 \[anti-PD-L1\] antibody) and nab-paclitaxel followed by doxorubicin and cyclophosphamide (nab-pac-AC), or placebo and nab-pac-AC in participants eligible for surgery with initial clinically assessed triple-negative breast cancer (TNBC).

Timeline

Start

2017-07-24

Primary completion

2020-04-03

Completion

2022-09-28

Publications

• Mittendorf EA, Assaf ZJ, Harbeck N, Zhang H, Saji S, Jung KH, Hegg R, Koehler A, Sohn J, Iwata H, Telli ML, Ferrario C, Punie K, Qamra A, Dieterich M, Xu Y, Liste-Hermoso M, Shearer-Kang E, Molinero L, Chui SY, Barrios CH. Peri-operative atezolizumab in early-stage triple-negative breast cancer: final results and ctDNA analyses from the randomized phase 3 IMpassion031 trial. Nat Med. 2025 Jul;31(7):2397-2404. doi: 10.1038/s41591-025-03725-4. Epub 2025 Jun 4.
• Mittendorf EA, Zhang H, Barrios CH, Saji S, Jung KH, Hegg R, Koehler A, Sohn J, Iwata H, Telli ML, Ferrario C, Punie K, Penault-Llorca F, Patel S, Duc AN, Liste-Hermoso M, Maiya V, Molinero L, Chui SY, Harbeck N. Neoadjuvant atezolizumab in combination with sequential nab-paclitaxel and anthracycline-based chemotherapy versus placebo and chemotherapy in patients with early-stage triple-negative breast cancer (IMpassion031): a randomised, double-blind, phase 3 trial. Lancet. 2020 Oct 10;396(10257):1090-1100. doi: 10.1016/S0140-6736(20)31953-X. Epub 2020 Sep 20.
• Perez-Garcia J, Soberino J, Racca F, Gion M, Stradella A, Cortes J. Atezolizumab in the treatment of metastatic triple-negative breast cancer. Expert Opin Biol Ther. 2020 Sep;20(9):981-989. doi: 10.1080/14712598.2020.1769063. Epub 2020 May 25.

Drugs

Indications