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Participants meeting all of the following inclusion criteria are eligible to |
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enroll in this |
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study |
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Written informed consent in accordance with federal, local, and institutional Guidelines |
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Age 18 years at the time of informed consent |
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Pathologically confirmed glioblastoma (including all histological variants; documentation to be provided) that are newly diagnosed (for Arms A and B) or relapsed disease (for Arm C) after 1 line of systemic therapy (RT+TMZ or RT+TMZ in combination with other drug) that have not received the second line systemic treatment for relapsed disease (surgical resection of recurrent disease allowed) |
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Prior therapy |
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Arms A and B: participants who have not received radiation or any systemic therapy for brain tumor and must be eligible for definitive external beam radiotherapy and temozolomide |
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Arm C: participants must have received prior treatment with radiation therapy and temozolomide (RT+TMZ in combination with other drug is allowed) |
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Measurable disease according to modified RANO guidelines |
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Participants enrolling must be on a stable or decreasing dose of corticosteroids (or none) for at least 5 days prior to the baseline magnetic resonance imaging (MRI) |
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Karnofsky Performance Score (KPS) 70 (for Arms A and B) and 60 (for Arm C) |
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Participants must have adequate organ function 2 weeks of study treatment as defined by the following laboratory criteria |
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Hematological function 7 days prior to Cycle 1 Day 1: absolute neutrophil count (ANC) 1.5 _10^9 per Liter (/L); platelet count 150_ 10^9/L; and hemoglobin (Hb) 10.0 gram per deciliter (g/dL). Transfusion is not allowed within 7 days prior to Cycle 1 Day 1 |
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Hepatic function: bilirubin 2 _the upper limit of normal (ULN), alanine transaminase (ALT) 2.5_ ULN, aspartate transaminase (AST) 2.5 _ULN; unless bilirubin elevation is related to Gilbert's Syndrome for which bilirubin must be <4_ULN |
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Renal function: calculated (Cockcroft-Gault) or measured creatinine clearance 30 milliliter per minute (mL/min) |
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Female participants of childbearing potential must have a negative serum pregnancy test at Screening and agree to use highly effective methods of contraception throughout the study and for 2 weeks following the last dose of study treatment |
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Fertile male participants who are sexually active with a female of childbearing potential must use highly effective methods of contraception throughout the study and for 4 months following the last dose of study treatment |
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For Arms A and B: participants must have had surgery and/or biopsy not greater than [>] 8 weeks prior to initial screening |
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Participants must consent to provide tumor tissue and blood samples to be used for future genetic testing for correlative studies |
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Participants meeting any of the following exclusion criteria are not eligible
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to enroll in this study
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Participants who are receiving any other investigational agents and /or have had prior therapy including
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For Arms A and B only
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Participants who have previously received RT to the brain
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Participants who received chemotherapy for the treatment of their glioma
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Participants who are being treated with implanted Gliadel wafers
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Participants who are being treated or plan to be treated during this study with tumor treating fields
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For Arm C
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<6 weeks from nitrosourea, <4 weeks from prior temozolomide or other chemotherapy or investigational agents prior to start of study treatment
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Prior treatment bevacizumab or other direct vascular endothelial growth factor (VEGF)/vascular endothelial growth factor receptor (VEGFR) inhibitors. For any questions of the definition of a direct VEGF/VEGFR inhibitor, consult the study Medical Monitor
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Any AE which has not recovered to Grade 1, or returned to baseline, related to the previous GBM therapy, except alopecia
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Major surgery <2 weeks prior to the start of study treatment
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History of allergic reactions attributed to compounds of similar chemical or biological composition to selinexor or other study treatment
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Participants must not have significantly diseased or obstructed gastrointestinal tract malabsorption, uncontrolled vomiting or diarrhea, or inability to swallow oral medication
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Participants with coagulation problems and medically significant bleeding in the month prior to start of treatment (peptic ulcers, epistaxis, spontaneous bleeding). Prior history of deep vein thrombosis or pulmonary embolism is not exclusionary
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Currently pregnant or breastfeeding
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For Arms A and B: participants with pre-existing known or suspected radiation sensitivity syndromes will be excluded due to potential confounding effect on outcome
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Any life-threatening illness, active medical condition, organ system dysfunction, or serious active psychiatric issue which, in the Investigator's opinion, could compromise the participant's safety or the participant's ability to remain compliant with study procedures
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Uncontrolled (i.e., clinically unstable) infection requiring parenteral antibiotics, antivirals, or antifungals within 7 days prior to first dose of study treatment; however, prophylactic use of these agents is acceptable even if parenteral
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Inability to swallow tablets, malabsorption syndrome, or any other gastrointestinal disease or dysfunction that could interfere with absorption of study treatment
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In the opinion of the Investigator, participants who are significantly below their ideal body weight
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