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Everolimus for the Treatment of Advanced Pancreatic Neuroendocrine Tumors: Overall Survival and Circulating Biomarkers From the Randomized, Phase III RADIANT-3 Study
Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA..
Charite, Berlin, Germany..
Hosp Civils Lyon, Hop Edouard Herriot, Lyon, France..
Univ Hosp Gasthuisberg, Leuven, Belgium.;Univ Hosp Leuven, Leuven, Belgium.;Katholieke Univ Leuven, Leuven, Belgium..
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2016 (English)In: Journal of Clinical Oncology, ISSN 0732-183X, E-ISSN 1527-7755, Vol. 34, no 32, 3906-+ p.Article in journal (Refereed) Published
Abstract [en]

Purpose Everolimus improved median progression-free survival by 6.4 months in patients with advanced pancreatic neuroendocrine tumors (NET) compared with placebo in the RADIANT-3 study. Here, we present the final overall survival (OS) data and data on the impact of biomarkers on OS from the RADIANT-3 study. Methods Patients with advanced, progressive, low-or intermediate-grade pancreatic NET were randomly assigned to everolimus 10 mg/day (n = 207) or placebo (n = 203). Crossover from placebo to openlabel everolimus was allowed on disease progression. Ongoing patients were unblinded after final progression-free survival analysis and could transition to open-label everolimus at the investigator's discretion (extension phase). OS analysis was performed using a stratified log-rank test in the intent-to-treat population. The baseline levels of chromogranin A, neuron-specific enolase, and multiple soluble angiogenic biomarkers were determined and their impact on OS was explored. Results Of 410 patients who were enrolled between July 2007 and March 2014, 225 received open-label everolimus, including 172 patients (85%) randomly assigned initially to the placebo arm. Median OS was 44.0 months (95% CI, 35.6 to 51.8 months) for those randomly assigned to everolimus and 37.7 months (95% CI, 29.1 to 45.8 months) for those randomly assigned to placebo (hazard ratio, 0.94; 95% CI, 0.73 to 1.20; P = .30). Elevated baseline chromogranin A, neuron-specific enolase, placental growth factor, and soluble vascular endothelial growth factor receptor 1 levels were poor prognostic factors for OS. The most common adverse events included stomatitis, rash, and diarrhea. Conclusion Everolimus was associated with a median OS of 44 months in patients with advanced, progressive pancreatic NET, the longest OS reported in a phase III study for this population. Everolimus was associated with a survival benefit of 6.3 months, although this finding was not statistically significant. Crossover of patients likely confounded the OS results.

Place, publisher, year, edition, pages
2016. Vol. 34, no 32, 3906-+ p.
National Category
Cancer and Oncology
Identifiers
URN: urn:nbn:se:uu:diva-311509DOI: 10.1200/JCO.2016.68.0702ISI: 000388926900014PubMedID: 27621394OAI: oai:DiVA.org:uu-311509DiVA: diva2:1060395
Available from: 2016-12-28 Created: 2016-12-28 Last updated: 2017-04-24Bibliographically approved

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