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Authors Maha H. A. Hussain, Thomas Powles, Peter Albers, Daniel Castellano, Siamak Daneshmand, Juergen Gschwend, Hiroyuki Nishiyama, Stephane Oudard, Darren Tayama, Nicole N. Davarpanah, Viraj Degaonkar, Yi Shi, Sanjeev Mariathasan, Petros Grivas, Peter H. O'Donnell, Jonathan E. Rosenberg, Daniel M. Geynisman, Jean H. Hoffman-Censits, Daniel Peter Petrylak, Joaquim Bellmunt
Title IMvigor010: Primary analysis from a phase III randomized study of adjuvant atezolizumab (atezo) versus observation (obs) in high-risk muscle-invasive urothelial carcinoma (MIUC).
Journal Journal of Clinical Oncology
Vol 38
Issue 15_suppl
Date
URL https://ascopubs.org/doi/abs/10.1200/JCO.2020.38.15_suppl.5000
Abstract Text Background: Radical surgery ± cisplatin-based neoadjuvant chemo (NAC) is the mainstay treatment (tx) for MIUC, with no conclusive level 1 evidence for adjuvant chemo (AC). Here we present the primary analysis from IMvigor010, a global, open-label, multicenter, randomized trial of adjuvant atezo (anti–PD-L1; approved in metastatic UC [mUC] settings) in pts with MIUC at high risk of recurrence following primary resection. Methods: Pts with MIUC (bladder, upper tract [UT]), ECOG PS 0-2 and resected tissue for PD-L1 testing on immune cells (IC; VENTANA SP142 assay) were enrolled ≤ 14 wks after radical cystectomy/nephroureterectomy with lymph node (LN) dissection. Pathologic stage: 1) ypT2-4a or ypN+ if pts had NAC or 2) pT3-4a or pN+ if pts did not have NAC. No postsurgical radiation or AC was allowed; if no NAC was given, pts must have been ineligible for or declined cisplatin-based AC. Pts were randomized 1:1 to atezo 1200 mg IV q3w or obs for 16 cycles or 1 y (stratification factors: no. of LNs resected, pathologic nodal status, pathologic tumor stage, PD-L1 status, prior NAC). Disease-free survival (DFS) was the primary endpoint (EP). Final DFS, first interim overall survival (OS; secondary EP) and safety are reported. Results: The ITT population included 809 pts (median follow-up, 21.9 mo). In the atezo and obs arms, respectively, 48% and 47% had NAC; 7% and 6% had UTUC as primary disease; 48% each had LN+ disease. DFS and OS are in Table. Baseline prognostic/clinical factors did not influence DFS tx benefit; stratified HR was 0.81 (95% CI: 0.63, 1.05) in IC0/1 pts (PD-L1 < 5%; n = 417) and 1.01 (0.75, 1.35) in IC2/3 pts (PD-L1 ≥ 5%; n = 392). 16% of atezo-treated pts had a tx-related G3-4 AE. Skin and gastrointestinal toxicities most commonly led to tx discontinuation. Conclusions: IMvigor010, the first phase 3 adjuvant study of a checkpoint inhibitor in MIUC, did not meet its primary EP of DFS. More tx discontinuation due to AEs was seen vs mUC studies. Safety was generally consistent with previous studies. Clinical trial information: NCT02450331.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
Unknown unknown invasive bladder transitional cell carcinoma no benefit Atezolizumab Phase III Actionable In a Phase III trial (IMvigor010). adjuvant Tecentriq (atezolizumab) did not improve disease-free survival (HR=0.89, p=0.2446) or overall survival (HR=0.85, p=0.1951) compared to observation in patients with high-risk muscle-invasive urothelial carcinoma, and resulted in more treatment discontinuation due to adverse effects than previous studies (J Clin Oncol 38, no. 15_suppl (May 20, 2020) 5000-5000; NCT02450331). detail...