Publication: Atezolizumab versus chemotherapy in patients with platinum-treated locally advanced or metastatic urothelial carcinoma (IMvigor211): a multicentre, open-label, phase 3 randomised controlled trial.
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Identifiers
Date
2017-12-18
Authors
Powles, Thomas
Duran, Ignacio
van-der-Heijden, Michiel S
Loriot, Yohann
Vogelzang, Nicholas J
De-Giorgi, Ugo
Oudard, Stephane
Retz, Margitta M
Castellano, Daniel
Bamias, Aristotelis
Advisors
Journal Title
Journal ISSN
Volume Title
Publisher
The Lancet Publishing Group
Abstract
Few options exist for patients with locally advanced or metastatic urothelial carcinoma after progression with platinum-based chemotherapy. We aimed to assess the safety and efficacy of atezolizumab (anti-programmed death-ligand 1 [PD-L1]) versus chemotherapy in this patient population. We conducted this multicentre, open-label, phase 3 randomised controlled trial (IMvigor211) at 217 academic medical centres and community oncology practices mainly in Europe, North America, and the Asia-Pacific region. Patients (aged ≥18 years) with metastatic urothelial carcinoma who had progressed after platinum-based chemotherapy were randomly assigned (1:1), via an interactive voice and web response system with a permuted block design (block size of four), to receive atezolizumab 1200 mg or chemotherapy (physician's choice: vinflunine 320 mg/m2, paclitaxel 175 mg/m2, or 75 mg/m2 docetaxel) intravenously every 3 weeks. Randomisation was stratified by PD-L1 expression (expression on Between Jan 13, 2015, and Feb 15, 2016, we randomly assigned 931 patients from 198 sites to receive atezolizumab (n=467) or chemotherapy (n=464). In the IC2/3 population (n=234), overall survival did not differ significantly between patients in the atezolizumab group and those in the chemotherapy group (median 11·1 months [95% CI 8·6-15·5; n=116] vs 10·6 months [8·4-12·2; n=118]; stratified hazard ratio [HR] 0·87, 95% CI 0·63-1·21; p=0·41), thus precluding further formal statistical analysis. Confirmed objective response rates were similar between treatment groups in the IC2/3 population: 26 (23%) of 113 evaluable patients had an objective response in the atezolizumab group compared with 25 (22%) of 116 patients in the chemotherapy group. Duration of response was numerically longer in the atezolizumab group than in the chemotherapy group (median 15·9 months [95% CI 10·4 to not estimable] vs 8·3 months [5·6-13·2]; HR 0·57, 95% CI 0·26-1·26). In the intention-to-treat population, patients receiving atezolizumab had fewer grade 3-4 treatment-related adverse events than did those receiving chemotherapy (91 [20%] of 459 vs 189 [43%] of 443 patients), and fewer adverse events leading to treatment discontinuation (34 [7%] vs 78 [18%] patients). Atezolizumab was not associated with significantly longer overall survival than chemotherapy in patients with platinum-refractory metastatic urothelial carcinoma overexpressing PD-L1 (IC2/3). However, the safety profile for atezolizumab was favourable compared with chemotherapy, Exploratory analysis of the intention-to-treat population showed well-tolerated, durable responses in line with previous phase 2 data for atezolizumab in this setting.
Description
MeSH Terms
Adult
Aged, 80 and over
Antibodies, Monoclonal, Humanized
Carcinoma
Female
Humans
Male
Paclitaxel
Treatment Outcome
Vinblastine
Aged, 80 and over
Antibodies, Monoclonal, Humanized
Carcinoma
Female
Humans
Male
Paclitaxel
Treatment Outcome
Vinblastine
DeCS Terms
Quimioterapia
Platino (Metal)
Carcinoma
Terapéutica
Sobrevida
Docetaxel
Paclitaxel
Seguridad
Eficacia
Platino (Metal)
Carcinoma
Terapéutica
Sobrevida
Docetaxel
Paclitaxel
Seguridad
Eficacia
CIE Terms
Keywords
Antibodies, Monoclonal, Aged, Antineoplastic Agents, Docetaxel, Middle Aged, Taxoids, Urologic Neoplasms
Citation
Powles T, Durán I, van der Heijden MS, Loriot Y, Vogelzang NJ, De Giorgi U, et al. Atezolizumab versus chemotherapy in patients with platinum-treated locally advanced or metastatic urothelial carcinoma (IMvigor211): a multicentre, open-label, phase 3 randomised controlled trial. Lancet. 2018 Feb 24;391(10122):748-757.