國家衛生研究院 NHRI:Item 3990099045/10516
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    題名: A phase II trial of regorafenib in patients with metastatic and/or a unresectable gastrointestinal stromal tumor harboring secondary mutations of exon 17
    作者: Yeh, CN;Chen, MH;Chen, YY;Yang, CY;Yen, CC;Tzen, CY;Chen, LT;Chen, JS
    貢獻者: National Institute of Cancer Research
    摘要: BACKGROUND: Gastrointestinal stromal tumors (GISTs) are caused by the constitutive activation of KIT or platelet-derived growth factor receptor alpha (PDGFRA) mutations. Imatinib selectively inhibits KIT and PDGFR, leading to disease control for 80%-90% of patients with metastatic GIST. Imatinib resistance can occur within a median of 2-3 years due to secondary mutations in KIT. According to preclinical studies, both imatinib and sunitinib are ineffective against exon 17 mutations. However, the treatment efficacy of regorafenib for patients with GIST with exon 17 mutations is still unknown. PATIENTS AND METHODS: Documented patients with GIST with exon 17 mutations were enrolled in this study. Patients received 160 mg of oral regorafenib daily on days 1-21 of a 28-day cycle. The primary end point of this trial was the clinical benefit rate (CBR; i.e., complete or partial response [PR], as well as stable disease [SD]) at 16 weeks. The secondary end points of this study included progression free survival (PFS), overall survival, and safety. RESULTS: Between June 2014 to May 2016, 18 patients were enrolled (15 of which were eligible for response evaluation). The CBR at 16 weeks was 93.3% (14 of 15; 6 PR and 8 SD). The median PFS was 22.1 months. The most common grade 3 toxicities were hand-and-foot skin reactions (10 of 18; 55.6%), followed by hypertension (5 of 18; 27.8%). CONCLUSION: Regorafenib significantly prolonged PFS in patients with advanced GIST harboring secondary mutations of exon 17. A phase III trial of regorafenib versus placebo is warranted. TRIAL REGISTRATION: This trial is registered at ClinicalTrials.gov in November 2015, number NCT02606097.Key message: This phase II trial was conducted to assess the efficacy and safety of regorafenib in patients with GIST with exon 17 mutations. The results provide strong evidence that regorafenib significantly prolonged PFS in patients with advanced GIST harboring secondary mutations of exon 17.
    日期: 2017-07
    關聯: Oncotarget. 2017 Jul;8(27):44121-44130.
    Link to: http://dx.doi.org/10.18632/oncotarget.17310
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000405498000044
    Cited Times(Scopus): https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85021806870
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