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Schmid P, Rugo HS, Adams S, Schneeweiss A, Barrios CH, Iwata H, Diéras V, Henschel V, Molinero L, Chui SY, Maiya V, Husain A, Winer EP, Loi S, Emens LA. Atezolizumab plus nab-paclitaxel as first-line treatment for unresectable, locally advanced or metastatic triple-negative breast cancer (IMpassion130): updated efficacy results from a randomised, double-blind, placebo-controlled, phase 3 trial. Lancet Oncol 2019; 21:44-59. [PMID: 31786121 DOI: 10.1016/s1470-2045(19)30689-8] [Citation(s) in RCA: 750] [Impact Index Per Article: 150.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/27/2019] [Accepted: 09/27/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Immunotherapy in combination with chemotherapy has shown promising efficacy across many different tumour types. We report the prespecified second interim overall survival analysis of the phase 3 IMpassion130 study assessing the efficacy and safety of atezolizumab plus nab-paclitaxel in patients with unresectable, locally advanced or metastatic triple-negative breast cancer. METHODS In this randomised, placebo-controlled, double-blind, phase 3 trial, done in 246 academic centres and community oncology practices in 41 countries, patients aged 18 years or older, with previously untreated, histologically documented, locally advanced or metastatic triple-negative breast cancer, and Eastern Cooperative Oncology Group performance status of 0 or 1 were eligible. Patients were randomly assigned (1:1) using a permuted block method (block size of four) and an interactive voice-web response system. Randomisation was stratified by previous taxane use, liver metastases, and PD-L1 expression on tumour-infiltrating immune cells. Patients received atezolizumab 840 mg or matching placebo intravenously on day 1 and day 15 of every 28-day cycle and nab-paclitaxel 100 mg/m2 of body surface area intravenously on days 1, 8, and 15 until progression or unacceptable toxicity. Investigators, patients, and the funder were masked to treatment assignment. Coprimary endpoints were investigator-assessed progression-free survival per Response Evaluation Criteria in Solid Tumors version 1.1 and overall survival, assessed in the intention-to-treat population and in patients with PD-L1 immune cell-positive tumours (tumours with ≥1% PD-L1 expression). The final progression-free survival results were previously reported at the first interim overall survival analysis. The prespecified statistical testing hierarchy meant that overall survival in the subgroup of PD-L1 immune cell-positive patients could only be formally tested if overall survival was significantly different between the treatment groups in the intention-to-treat population. This study is registered with ClinicalTrials.gov, NCT02425891. FINDINGS Between June 23, 2015, and May 24, 2017, 902 patients were enrolled, of whom 451 were randomly assigned to receive atezolizumab plus nab-paclitaxel and 451 were assigned to receive placebo plus nab-paclitaxel (the intention-to-treat population). Six patients from each group did not receive treatment. At the second interim analysis (data cutoff Jan 2, 2019), median follow-up was 18·5 months (IQR 9·6-22·8) in the atezolizumab group and 17·5 months (8·4-22·4) in the placebo group. Median overall survival in the intention-to-treat patients was 21·0 months (95% CI 19·0-22·6) with atezolizumab and 18·7 months (16·9-20·3) with placebo (stratified hazard ratio [HR] 0·86, 95% CI 0·72-1·02, p=0·078). In the exploratory overall survival analysis in patients with PD-L1 immune cell-positive tumours, median overall survival was 25·0 months (95% CI 19·6-30·7) with atezolizumab versus 18·0 months (13·6-20·1) with placebo (stratified HR 0·71, 0·54-0·94]). As of Sept 3, 2018 (the date up to which updated safety data were available), the most common grade 3-4 adverse events were neutropenia (38 [8%] of 453 patients in the atezolizumab group vs 36 [8%] of 437 patients in the placebo group), peripheral neuropathy (25 [6%] vs 12 [3%]), decreased neutrophil count (22 [5%] vs 16 [4%]), and fatigue (17 [4%] vs 15 [3%]). Treatment-related deaths occurred in two (<1%) patients in the atezolizumab group (autoimmune hepatitis related to atezolizumab [n=1] and septic shock related to nab-paclitaxel [n=1]) and one (<1%) patient in the placebo group (hepatic failure). No new treatment-related deaths have been reported since the primary clinical data cutoff date (April 17, 2018). INTERPRETATION Consistent with the first interim analysis, this second interim overall survival analysis of IMpassion130 indicates no significant difference in overall survival between the treatment groups in the intention-to-treat population but suggests a clinically meaningful overall survival benefit with atezolizumab plus nab-paclitaxel in patients with PD-L1 immune cell-positive disease. However, this positive result could not be formally tested due to the prespecified statistical testing hierarchy. For patients with PD-L1 immune cell-positive metastatic triple-negative breast cancer, atezolizumab plus nab-paclitaxel is an important therapeutic option in a disease with high unmet need. FUNDING F Hoffmann-La Roche and Genentech.
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Affiliation(s)
- Peter Schmid
- Barts Cancer Institute, Queen Mary University of London, London, UK.
| | - Hope S Rugo
- University of California San Francisco Comprehensive Cancer Center, University of California, San Francisco, CA, USA
| | - Sylvia Adams
- Perlmutter Cancer Center, New York University Langone Medical Center, New York, NY, USA
| | - Andreas Schneeweiss
- National Center for Tumor Diseases, Heidelberg University Hospital and German Cancer Research Center, Heidelberg, Germany
| | - Carlos H Barrios
- Centro de Pesquisa Clínica, Hospital São Lucas, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil; Latin American Cooperative Oncology Group, Porto Alegre, Brazil; Grupo Oncoclínicas, Porto Alegre, Brazil
| | | | - Véronique Diéras
- Department of Medical Oncology, Institut Curie, Paris, France; Department of Medical Oncology, Centre Eugène Marquis, Rennes, France
| | | | | | | | | | | | | | - Sherene Loi
- Peter MacCallum Cancer Centre, University of Melbourne, Melbourne, VIC, Australia
| | - Leisha A Emens
- University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA
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Luhn P, Chui SY, Hsieh AFC, Yi J, Mecke A, Bajaj PS, Hasnain W, Falgas A, Ton TG, Kurian AW. Comparative effectiveness of first-line nab-paclitaxel versus paclitaxel monotherapy in triple-negative breast cancer. J Comp Eff Res 2019; 8:1173-1185. [PMID: 31394922 DOI: 10.2217/cer-2019-0077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Aim: This observational study evaluated the effectiveness of nab-paclitaxel versus paclitaxel monotherapy as first-line (1L) treatment for metastatic triple-negative breast cancer (mTNBC). Materials & methods: 200 patients from the US Flatiron Health electronic health record-derived database (mTNBC diagnosis, January 2011-October 2016) who received 1L nab-paclitaxel (n = 105) or paclitaxel (n = 95) monotherapy were included. Overall survival and time to next treatment were evaluated. Results: The adjusted overall survival hazard ratio was 0.98 (95% CI: 0.67-1.44), indicating a similar risk of death between groups. Adjusted time to next treatment hazard ratio was 0.89 (95% confidence interval: 0.62-1.29). Conclusion: Nab-paclitaxel and paclitaxel monotherapy showed similar efficacy, suggesting their interchangeability as 1L treatments for mTNBC.
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Affiliation(s)
- Patricia Luhn
- Genentech, Inc., 1 DNA Way, MS 35-6i, South San Francisco, CA 94080, USA
| | - Stephen Y Chui
- Genentech, Inc., 1 DNA Way, MS 35-6i, South San Francisco, CA 94080, USA
| | | | - Jingbo Yi
- Genesis Research Group, 5 Marine View Plaza, Hoboken, NJ 07030, USA
| | - Almut Mecke
- F. Hoffmann-La Roche, 4 Oncology, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - Preeti S Bajaj
- Genentech, Inc., 1 DNA Way, MS 35-6i, South San Francisco, CA 94080, USA
| | - Waseem Hasnain
- Genentech, Inc., 1 DNA Way, MS 35-6i, South San Francisco, CA 94080, USA
| | - Adeline Falgas
- F. Hoffmann-La Roche, 4 Oncology, Grenzacherstrasse 124, 4070 Basel, Switzerland
| | - Thanh Gn Ton
- Genentech, Inc., 1 DNA Way, MS 35-6i, South San Francisco, CA 94080, USA
| | - Allison W Kurian
- Departments of Medicine (Oncology) & of Health Research & Policy, Women's Clinical Cancer Genetics Program, Stanford University School of Medicine HRP Redwood Building, Room T254A, 150 Governor's Lane, Stanford, CA 94305, USA
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