The primary objective of this Phase 1, open-label, dose-escalation, and exploratory study is to evaluate the safety and tolerability profile (establish the maximum-tolerated dose) and evaluate the occurrence of dose-limiting toxicities (DLTs) following single weekly or multiple-day weekly dose regimens of single-agent, oral ONC206 in patients with recurrent, primary central nervous system (CNS) neoplasms.
Eligibility criteria
This trial does not accept healthy volunteers
Qualifiers
Patients aged ≥18 years with a recurrent, primary CNS neoplasm. For all cohorts, patients must have a histologically confirmed primary CNS neoplasm. Primary CNS neoplasms in this study include, but are not limited to, the following: glioblastoma and glioblastoma histologic subtypes, gliosarcoma, primary CNS sarcomas, anaplastic glial neoplasms including anaplastic astrocytoma, anaplastic oligodendroglioma, anaplastic mixed neuronal-glial tumors, and pilocytic astrocytoma with anaplastic features, diffuse astrocytoma, oligodendroglioma, gliomatosis cerebri, pleomorphic xanthoastrocytoma, anaplastic pleomorphic xanthoastrocytoma, diffuse midline gliomas and histone mutated gliomas (NOTE: Patients with H3 K27M-mutant diffuse gliomas are excluded unless the primary tumor is located in the pons or spinal cord, or the patient has completed front line radiation or received ONC201 therapy prior to 01 January 2023), ependymoma, anaplastic ependymoma, and all ependymoma subtypes, medulloblastoma and all medulloblastoma subtypes, atypical teratoid/rhabdoid tumor, primary CNS embryonal/primitive neuroectodermal tumors, atypical and anaplastic meningiomas, choroid plexus tumors, and pineal region tumors.
Patients must have recurrent and measurable disease as defined by RANO criteria, using either the HGG and/or LGG RANO criteria based on tumor type, after having received established standard of care treatment for their disease and have no standard treatment options available as determined by the investigators. There is no limit on the number of total recurrences or prior therapies. However, prior therapies with known clinical benefit (including radiation) for specific tumor types are required. If patients are deemed ineligible for such therapies in the opinion of the Investigator, the Investigator must document the reason the patient is considered ineligible.
Patients must have a Karnofsky Performance Score (KPS) of greater than or equal to 70. Patients with severe paraparesis/paraplegia who need minimal assistance for self-care due to their motor deficit but are otherwise functionally independent will be considered eligible.
(Inclusion Criterion #4 was removed in Amendment 3.)
Disqualifiers
(Exclusion Criterion #1 was removed in Amendment 3)
Patients with a history of allergic reactions attributed to compounds of similar chemical or biologic composition to ONC206 (e.g., ONC201) or its excipients.
Patients with uncontrolled intercurrent illness including, but not limited to, ongoing or active infection or psychiatric illness/social situations that would limit compliance with study requirements.
Patients who are unable or unwilling to abide by the study protocol or cooperate fully with the Investigator.
Trial design
Design model
Single group
Treatments tested in this trial
ONC206
Drug
ONC206 is a member of the imipridone class of anti-cancer small molecules that share a unique tri-heterocyclic core chemical structure and target G protein-coupled receptors.
Treatment groups
102 Participants
are divided into 1 treatment group
Group A: ONC206Experimental treatment 1 intervention
Trial outcomes
Primary outcomes
1
Maximum Tolerated Dose (MTD) of single-agent, oral ONC206
MTD was determined by testing increasing doses up to 200 mg twice daily for 3 successive days a week.
MTD reflects the highest dose of drug that did not cause a Dose-Limiting Toxicity (DLT) in \>33% of participants. DLTs will be assessed in the first course of each cohort (28 days), and refer to a study drug-related or possibly related event that meets 1 of the following criteria defined in the subsequent Primary Outcome Measure using the National Cancer Institute Common Terminology Criteria for Adverse Events Version 5.0 (NCI CTCAE 5.0).
Time frame
28 Days
2
Number of Participants who Experienced Dose-Limiting Toxicities (DLTs)
DLTs will be assessed in the first course of each cohort (28 days), and refer to a study drug-related or possibly related event that meets 1 of the following criteria using NCI CTCAE 5.0:
* Grade 3 or higher non-hematologic toxicity.
* Grade 4 hematologic toxicity (ANC \<0.5 × 109/L and platelet count \<25 × 109/L). Lymphopenia is not considered a DLT. A confirmed DLT requires 2 consecutive measurements separated by 48 hours.
* Grade 3 neutropenia (absolute neutrophil count \[ANC\] \<1.0 × 109/L) with elevated fever (\>101°F). A confirmed DLT requires 2 consecutive measurements.
* Grade 3 thrombocytopenia with clinically significant bleeding.
* Inability to receive the scheduled Cycle 2, Day 1 dose of study drug within 14 days due to study drug-related toxicity persisting from Cycle 1 or study drug-related toxicity newly encountered on Day 1 of Cycle 2.
Time frame
28 Days
Secondary outcomes
Other outcomes
Sponsors and contacts
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