First in Human Multicenter Open Name Dose-increase, Consolidation Method to Study Safety Drug-level in Blood & Drug Metabolism Clinical Activity of Oral JBI-778 in Lung Cancer Patients With, Without Brain Metastasis IDH Mutated WHO Grade 3,4 Recurrent Glioma, Salivary Glands Tumor

Condition(s) studied

Investigational drug(s) / intervention(s)

JBI-778: JBI-778 is an orally administered selective PRMT5 inhibitor supplied as capsules. The starting dose is 40 mg once daily. Participants will receive JBI-778 in continuous 21-day treatment cycles with dose escalation based on a 3+3 design. Capsules are taken orally with water approximately 1 hour before a meal or 2 hours after a meal.

Study summary

This is a phase 1, multicentre, first-in-human, open-label, dose-escalation/consolidation study to investigate the safety, pharmacokinetics, pharmacodynamics, and clinical activity of orally administered JBI-778 in EGFR mutated lung cancer patients with or without brain metastasis, IDH mutated WHO grade 3 /4 recurrent glioma and ACC with evidence of recurrent, metastatic or advanced, incurable disease arising from any primary site. A total of 42 patients will be recruited in the study. The initial dose escalation up to cohort 3 (estimate to be 160mg) or until the pharmacologically active dose is reached, whichever comes first as determined by the safety committee will be performed only in EGFR mutant NSCLC patients with or without stable cerebral metastases and ACC patients. Once this dose level is reached IDH mutant WHO grade 3 /4 glioma patients will be added. Once the RP2D is determined following dose escalation, additional patients, up to 12, will be treated at that dose to obtain further safety data and preliminary efficacy. Approximately 4 to 6 sites are anticipated for the dose-escalation/consolidation, additional sites will be evaluated as needed. Study will be initiated only after receipt of regulatory and ethics committee (EC) approval. After signing the informed consent form, the patients will undergo screening assessments to confirm eligibility. Eligible patients will be considered first for initial dose escalation and once the RP2D is determined following dose escalation, additional patients, up to 12, will be treated at that dose to obtain further safety data and preliminary efficacy. The RP2D will be establish after a detailed analysis of the totality of dose escalation data, including PK, safety, efficacy, CNS penetration based on CSF sample for study drug presence, analysis of PD markers in peripheral blood and both pre-treatment and on treatment tumor biopsies.

The duration of participation for each patient will be as follows: Screening: - Up to 21 days (-21 to 1 days); Treatment period: Treatment cycle of 21-day each. Treatment may continue for up to 2 years from the start of treatment, provided that the patient experiences clinical benefit in the opinion of the Investigator and shows no signs or symptoms of unequivocal progression of the disease, unacceptable toxicity, or other reasons for study discontinuation. End of treatment (EOT)/ Early termination (ET) visit Safety Follow-up: 30 days after last dose Survival: Every 3 months

Eligibility

Primary outcome measure(s)

• Incidence of Dose-Limiting Toxicities (DLTs) — At the end of Cycle 1 (each cycle is 21 days)
  Incidence of dose-limiting toxicities during the DLT evaluation period to determine the maximum tolerated dose (MTD) and recommended Phase 2 dose (RP2D) of JBI-778.

Trial sites (6)