Pharmacokinetics, Safety, and Efficacy of Brigatinib Monotherapy in Pediatric and Young Adult Participants With ALK+ Anaplastic Large Cell Lymphoma, Inflammatory Myofibroblastic Tumors or Other Solid Tumors

Takeda

Overview

The purpose of this study is to estimate the maximum tolerated dose (MTD)/ recommended phase 2 dose (RP2D) regimen and characterize the pharmacokinetics (PK) of brigatinib monotherapy (film-coated tablets and age-appropriate formulation \[AAF\]) administered orally once daily (QD) in pediatric and young adult participants in Phase 1 and to define the efficacy of brigatinib administered as monotherapy within the disease-specific expansion arms (unresectable/recurrent anaplastic lymphoma kinase positive (ALK+) inflammatory myofibroblastic tumor (IMT); relapsed/refractory ALK+ anaplastic large cell lymphoma (ALCL) in Phase 2.

The drug being tested in this study is called Brigatinib. Brigatinib is being tested to treat people who have Anaplastic Large Cell Lymphoma, Inflammatory Myofibroblastic Tumors or other solid tumours. The study will enroll approximately 61 patients. Participants will be assigned to the following arm group to receive brigatinib: * Phase 1 (Dose Escalation): Brigatinib Dose Level 1 and Dose Level 2 (based on safety and tolerability) * Phase 2 (Dose Expansion): Unresectable/ Recurrent ALK+ IMT * Phase 2 (Dose Expansion): Relapsed/ Refractory ALK+ ALCL All participants will be administered brigatinib orally once daily in 28-day Cycles. Participants will receive fixed doses of brigatinib based on weight ranges. The starting doses in Phase 1 (Dose Level 1) are expected to provide systemic exposures of brigatinib in pediatric participants comparable to those achieved in adults receiving the recommended clinical dose of 90 mg once daily for 7 days followed by 180 mg once daily. One additional dose level (Dose Level 2) is planned in Phase 1 if the initial dose level is tolerated. This subsequent dose level is expected to provide systemic exposures of brigatinib in pediatric participants comparable to those achieved in adults receiving 90 mg once daily for 7 days followed by 240 mg once daily (the highest acceptably tolerated dose in adults). In Phase 2, brigatinib will be administered at the RP2D determined during Phase 1. This multi-centre trial will be conducted worldwide. The overall time to participate in this study is approximately 36 months. Participants will make multiple visits to the clinic and will be contacted by telephone OR a final visit after receiving their last dose of brigatinib for a follow-up assessment.

Study Type

INTERVENTIONAL

Allocation

NON_RANDOMIZED

Conditions

Anaplastic Lymphoma Kinase Positive (ALK +) Anaplastic Large Cell Lymphoma Inflammatory Myofibroblastic Tumors Solid Tumors

Interventions

BrigatinibDRUG

Brigatinib tablets

Brigatinib AAFDRUG

Brigatinib age-appropriate formulation (AAF)

Eligibility

Sex: ALLMin age: 1 YearMax age: 25 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Participants must have confirmed cancer histologically or cytologically diagnosed at baseline 2. Participants are required to provide prior results showing an activating ALK aberration in the tumor (bone marrow aspirate, peripheral blood samples, biopsy, etc) documented by fluorescence in situ hybridization (FISH), polymerase chain reaction (PCR) for the ALK-fusion transcript, next generation sequencing (NGS) or ALK immunohistochemistry (ALK immunohistochemistry can be used as a surrogate for FISH or NGS) 3. Phase 1, participants must be relapsed/refractory or intolerant to standard therapies or without option of established systemic therapy 4. Phase 2, participants must have measurable and/or evaluable disease: * Arm 1: IMT participants must not be suitable for curative surgical resection * Arm 2: participants must have relapsed/refractory ALCL 5. Performance Status: Karnofsky performance status ≥40% for participants \>16 years of age or Lansky Play Scale ≥40% for participants ≤16 years of age 6. For participants receiving prior therapy: * Participants must have recovered to Grade \<2 NCI CTCAE v5.0 or to baseline, from any nonhematologic toxicities (except alopecia and peripheral neuropathy) due to previous therapy * Participants who relapsed while receiving cytotoxic therapy: At least 14 days must have passed since the completion of the last dose of chemotherapy before the first dose of brigatinib can be given * Participants with hematologic malignancy and prior hematopoietic stem cell transplant (HSCT): Participants who have experienced relapse after a HSCT are eligible, provided they have no evidence of acute or chronic graft-versus-host disease (GVHD), are not receiving GVHD prophylaxis or treatment, and are at least 45 days posttransplant at the time of enrollment * Hematopoietic growth factors: Before the first dose of brigatinib, at least 7 days must have passed since completion of therapy with granulocyte colony-stimulating factor or other growth factors, and at least 14 days must have passed since completion of therapy with pegfilgrastim * Biologics and Targeted Therapies: * Immunotherapy: Before the first dose of brigatinib, at least 30 days must have passed after the completion of any type of immunotherapy, (eg, monoclonal antibodies \[anti-PD1/PDL1\], tumor vaccines, chimeric antigen receptor \[CAR\] T cells, etc.) * Other: before the first dose of brigatinib, at least 7 days must have passed since the last dose of a biologic agent. For agents that have known adverse events (AEs) occurring beyond 7 days after administration, this period must be extended beyond the time during which AEs are known to occur. The duration of this interval must be discussed with the sponsor's medical monitor/designee * Immunosuppressive therapy: Before the first dose of brigatinib, at least 14 days must have passed after the completion of immunosuppressive therapy (including regimens following stem cell transplant) * For symptomatic participants that urgently need relief (eg, airway obstruction), therapeutic doses of corticosteroids may be administered for a short course (up to 5 days) * Radiotherapy (XRT): No washout period is necessary for radiation given to any extramedullary site other than the CNS and lungs; ≥6 weeks must have passed if participants received prior total body irradiation or craniospinal or cranial XRT; ≥28 days must have passed if participants received radiotherapy to the lung(s) 7. Normal QT interval corrected per Fridericia method (QTcF) on screening electrocardiogram (ECG), defined as QTcF of ≤450 ms 8. Have life expectancy of ≥3 months. Exclusion Criteria: 1. Participants receiving systemic treatment with strong or moderate cytochrome P450 3A (CYP3A) inhibitors or inducers within 14 days prior to the first dose of study drug 2. Previous treatment with brigatinib or other ALK inhibitors (except for participants in Phase 1) 3. Participants with completely resected stage-1 (ALCL and other lymphomas) disease 4. Participants with disease limited to skin (ALCL and other lymphomas) 5. Diagnosis of another concurrent primary malignancy 6. Clinically significant cardiovascular disease, including any of the following: * Myocardial infarction or unstable angina within 6 months of study entry * Uncontrolled hypertension defined as persistent elevation of systolic and/or diastolic blood pressures to ≥95th percentile based on age, sex, and height percentiles despite appropriate antihypertensive management 7. Planned non-protocol chemotherapy, radiation therapy, another investigational agent, or immunotherapy while participant is on study treatment 8. Uncontrolled seizure disorder. (Participants with seizure disorders that do not require antiepileptic drugs, or are well controlled with stable doses of antiepileptic drugs are eligible). 9. Any illness that affects gastrointestinal absorption 10. Ongoing or active systemic infection, active seropositive HIV, or known active hepatitis B or C infection.

Outcomes

Primary Outcomes

Phase 1: Maximum Tolerated Dose (MTD) Regimen of Brigatinib Monotherapy

MTD will be highest dose of brigatinib, at which \<=1 of 6 participants would experience a dose-limiting toxicity (DLT). DLT is defined using National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 5.0, as: Non-Haematological events possibly or definitively brigatinib related grade ≥3 AE except fatigue, nausea, vomiting lasting for \<48 hours and nonhematologic laboratory abnormalities that resolve to Grade 1 or baseline within 7 days after study drug modification and/or supportive care; hematologic toxicities (except in participants with bone marrow involvement or MAS) as: Grade 4 neutropenia lasting longer than 7 days with supportive care, Grade ≥3 febrile neutropenia requiring antibiotics, Grade 3 platelet count (\<50,000-25,000/μL) with bleeding requiring transfusion, Grade 4 platelet count (\<25,000/μL) at any time, any delay or interruption of therapy of ≥2 weeks due to suspected treatment-related hematologic toxicities.

Time frame: Up to 35 days

Phase 1: Recommended Phase 2 Dose (RP2D) of Brigatinib Monotherapy

The RP2D is the maximum tolerated dose (MTD) or less. MTD was highest dose of Brigatinib, at which \<=1 of 6 participants experienced DLT.

Time frame: Up to 35 days

Phase 1: Maximum Observed Plasma Concentration (Cmax) of Brigatinib

Time frame: Cycle 1, Days 1 and 15: Predose (Day 15 only) and at multiple timepoints (Up to 24 hours) post-dose; Predose on Day 1, Cycle 2 (each cycle is of 28 days)

Phase 1: Time of First Occurrence of Maximum Observed Plasma Concentration (Tmax) of Brigatinib

Time frame: Cycle 1, Days 1 and 15: Predose (Day 15 only) and at multiple timepoints (Up to 24 hours) post-dose; Predose on Day 1, Cycle 2 (each cycle is of 28 days)

Phase 1: Area Under the Concentration-time Curve From Time 0 to the Time of the Last Quantifiable Plasma Concentration (AUClast) of Brigatinib

Time frame: Cycle 1, Days 1 and 15: Predose (Day 15 only) and at multiple timepoints (Up to 24 hours) post-dose; Predose on Day 1, Cycle 2 (each cycle is of 28 days)

Data from ClinicalTrials.gov

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Secondary Outcomes

Phase 1: Number of Participants with Dose Limiting Toxicity (DLTs)

DLT is defined using National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE), version 5.0, as: Non-Haematological events possibly or definitively brigatinib related grade ≥3 AE except fatigue, nausea, vomiting lasting for \<48 hours and nonhematologic laboratory abnormalities that resolve to Grade 1 or baseline within 7 days after study drug modification and/or supportive care; hematologic toxicities (except in participants with bone marrow involvement or MAS) as: Grade 4 neutropenia lasting longer than 7 days with supportive care, Grade ≥3 febrile neutropenia requiring antibiotics, Grade 3 platelet count (\<50,000-25,000/μL) with bleeding requiring transfusion, Grade 4 platelet count (\<25,000/μL) at any time, any delay or interruption of therapy of ≥2 weeks due to suspected treatment-related hematologic toxicities.

Time frame: Up to 35 days

Phases 1 and 2: Percentage of Participants With One or More Adverse Events (AEs) and Serious Adverse Events (SAEs)

An AE is any untoward medical occurrence in a participant administered a medicinal investigational drug. The untoward medical occurrence does not necessarily have to have a causal relationship with treatment. A SAE is any AE that results in death, is life-threatening, requires inpatient hospitalization or prolongation of an existing hospitalization, results in significant disability or incapacity, is a congenital anomaly/birth defect or is a medically important event.

Time frame: From the first dose of study drug up to 30 days after last dose of study drug (Up to approximately 2 years)

Overall Acceptability and Palatability as Assessed by Acceptability and Palatability Questionnaire Score

Acceptability is defined as the overall ability of the participant to use the medicine as intended. Acceptability and palatability (taste and smell) will be assessed using a 5-point facial hedonic scale, where 1 indicates 'bad', and 5 indicates 'good'.

Time frame: Days 1 and 8 (Cycle 1)

Phase 2: Duration of Response (DOR)

DOR is defined as the time from the initial assessment of CR response until subsequent disease progression or relapse. Per RECIST 1.1, CR is defined as disappearance of all target lesions and per IPNHL, response criteria CR is defined as disappearance of all residual disease and tumor lesions. Disease progression as per RECIST 1.1, is defined as at least a 20% increase in the sum of the longest diameter (LD) of target lesions, taking as reference the smallest sum LD recorded since the treatment started or the appearance of one or more new lesions. Disease progression as per IPNHL response criteria, is defined as development of new morphologic evidence of disease in bone marrow.