Everolimus Versus Sunitinib Prospective Evaluation in Metastatic Non-Clear Cell Renal Cell Carcinoma (ESPN): A Randomized Multicenter Phase 2 Trial

Nizar M. Tannir, Eric Jonasch, Laurence Albiges, Emre Altinmakas, Chaan S. Ng, Surena F. Matin, Xuemei Wang, Wei Qiao, Zita Dubauskas Lim, Pheroze Tamboli, Priya Rao, Kanishka Sircar, Jose A. Karam, David F. McDermott, Christopher G. Wood, Toni K. Choueiri

Research output: Contribution to journalArticlepeer-review

262 Scopus citations

Abstract

Background Sunitinib and everolimus are standard first-line and second-line therapies, respectively, in clear cell renal cell carcinoma (ccRCC). Objective To conduct a randomized phase 2 trial comparing sunitinib and everolimus in non-clear cell RCC (non-ccRCC). Design, setting, and participants Patients with metastatic, non-ccRCC, or ccRCC with >20% sarcomatoid features (ccSRCC) were randomized to receive sunitinib or everolimus with crossover at disease progression. Outcome measurement and statistical analysis Primary end point was progression-free survival (PFS) in first-line therapy; 108 patients were needed to show improvement in median PFS (mPFS) from 12 wk with sunitinib to 20 wk with everolimus. Results and limitations Interim analysis of 68 patients (papillary [27], chromophobe [12], unclassified [10], translocation [7], ccSRCC [12]) prompted early trial closure. The mPFS in first-line therapy was 6.1 mo with sunitinib and 4.1 mo with everolimus (p = 0.6); median overall survival (mOS) was not reached with sunitinib and was 10.5 mo with everolimus, respectively (p = 0.014). At final analysis, mOS was 16.2 and 14.9 mo with sunitinib and everolimus, respectively (p = 0.18). There were four partial responses (PRs) in first-line therapy (sunitinib: 3 of 33 [9%]; everolimus, 1 of 35 [2.8%]) and four PRs in second-line therapy (sunitinib: 2 of 21 [9.5%]; everolimus, 2 of 23 [8.6%]), with mPFS of 1.8 mo and 2.8 mo, respectively. In patients without sarcomatoid features in their tumors (n = 49), mOS was 31.6 mo with sunitinib and 10.5 mo with everolimus (p = 0.075). Genomic profiling of a chromophobe RCC from a patient with a PR to first-line everolimus revealed a somatic TSC2 mutation. Conclusions In this trial, everolimus was not superior to sunitinib. Both agents demonstrated modest efficacy, underscoring the need for better therapies in non-ccRCC. Patient summary This randomized phase 2 trial provides the first head-to-head comparison of everolimus and sunitinib in patients with metastatic non-clear cell renal cell carcinoma (non-ccRCC). The observed very modest efficacy underscores the need to develop more effective therapies for non-ccRCC.

Original languageEnglish (US)
Pages (from-to)866-874
Number of pages9
JournalEuropean urology
Volume69
Issue number5
DOIs
StatePublished - May 1 2016

Keywords

  • Everolimus
  • Non-clear cell renal cell carcinoma
  • Renal cell carcinoma
  • Sunitinib

ASJC Scopus subject areas

  • Urology

MD Anderson CCSG core facilities

  • Biostatistics Resource Group
  • Clinical Trials Office

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