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- W2891650963 abstract "e21014 Background: Limited effective therapies exist for patients with melanoma after progression on immune- and targeted-therapies. Treatment with selinexor, a potent small molecule inhibitor of exportin-1 (CRM/XPO1), results in nuclear retention of major tumor suppressor proteins and cell cycle regulators, leads to growth arrest and apoptosis in vitro, in xenograft models (BRAF +/-), and Phase I solid tumor trial. (Yang et al PLOS One, 2014, Razak et al JCO, 2016). Methods: Objectives of this single institution trial were to determine: the safety in melanoma patients, the clinical benefit rate, and efficacy at the MTD as measured by PFS. Patients received prior immunotherapy and a BRAF inhibitor (mutation positive). Lead-in phase is completed. Median number of prior systemic therapies = 2 (2 – 4). Selinexor (50 mg/m 2 ) was orally administered twice weekly, with 2-3 days off between doses. Toxicities were evaluated every 28-days. Tumor biopsies were collected for correlative analysis. Results: As of Jan 2017, 7 patients (0/7 BRAF mutant) were enrolled. Drug related AEs: neutropenia (grade 4) (1/7 patients), hyponatremia (grade 3) (1/7 patients), thrombocytopenia (Grade 3) (3/7 patients), anemia (Grade 3) (1/7 patients), and thromboembolic events (Grade 3) (1/7 patients). There were no DLT’s. Four patients experienced stable disease (SD); one patient had a minor response, for a disease control rate (DCR) of 71% (5/7). Mean duration of response was 207 days (70 – 335). One patient, removed from therapy due to a CNS met, continued with stable systemic disease off therapy for 177 days. Another patient, taken off therapy due to a non-drug related adverse event, remained SD for 127 days. Conclusions: These preliminary results demonstrate that selinexor is well tolerated with supportive care, is safe for melanoma patients dosed at the 50 mg/m 2, and has the potential to control disease progression as a single agent in patients with prior BRAF inhibitor and immunotherapy. Patients are currently enrolling at a flat 60 mg dose. Correlative studies including evaluation of selinexor target engagement and exploratory markers of drug response are underway. Clinical trial information: NCT02120222. Clinical trial information: NCT02120222." @default.
- W2891650963 created "2018-09-27" @default.
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- W2891650963 date "2017-05-20" @default.
- W2891650963 modified "2023-09-27" @default.
- W2891650963 title "Selinexor, a selective inhibitor of nuclear export (SINE), in patients with unresectable melanoma." @default.
- W2891650963 doi "https://doi.org/10.1200/jco.2017.35.15_suppl.e21014" @default.
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