Canadian clinical trial registry

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Study Description

This study consists of 2 parts: Dose Escalation Part 1 and Dose Expansion Part 2.

The Dose Escalation Part 1 will evaluate the safety and tolerability of Avelumab in combination with Lenvatinib and determine the recommended Avelumab and Lenvatinib dose for expansion.

Dose Expansion Part 2 will assess the efficacy of Avelumab in combination with Lenvatinib by Progression-free Survival in participants with pre-defined primary central nervous system (CNS) tumors.

Inclusion Criteria

• Participants with histologically confirmed diagnosis of primary CNS malignancy as follows: a) Primary CNS tumors: the tumor should be considered high-grade histologically; prior radiotherapy is allowed; participants must have progressed after at least 1 prior systemic therapy, except for those with diffuse midline glioma with or without the H3 K27M mutation. b) Specific for participants with diffuse midline glioma with or without the H3 K27M mutation: prior radiotherapy is allowed; no more than 1 prior systemic therapy is allowed; participants with diffuse midline glioma with or without the H3 K27M mutation who have not received prior systemic therapy but have prior radiotherapy only are allowed to enroll
• On screening scans, measurable disease by RANO criteria
• Participants must have a Lansky performance status >= 50 for age <= 16 years or Karnofsky performance status >= 50 for age > 16 years at Screening

Other protocol defined inclusion criteria could apply

Exclusion Criteria

• Participants with low-grade gliomas, for example but not limited to, subependymal giant cell astrocytoma, pilocytic astrocytoma and World Health organization (WHO) Grade 1 tumors
• Participants demonstrating evidence of worsening of neurologic deficit within 1 week prior to initiation of study interventions
• Participants with bulky tumor, defined as: a) Tumor with any evidence of uncal herniation or midline shift; b) Tumor with a diameter of > 4 centimeters (cm) in 1 dimension on T2/ fluid-attenuated inversion recovery (FLAIR) images; c) Tumor that in the opinion of the Investigator shows significant mass effect
• Participants are not eligible if they experience uncontrolled seizures, defined as: a) Seizures requiring regular use of rescue medications. b) Seizures requiring increasing doses of antiepileptic medications. c) Seizures that in the opinion of the Investigator compromise the ability of the participant to tolerate study intervention or interfere with study procedures
• Participants who have received major surgery (including but not limited to neurosurgical resection, brain biopsy, or radiation to the primary brain tumor) within 28 days prior to the first dose of study interventions
• Participants with history of intracranial hemorrhage/spinal cord hemorrhage within 28 days prior to the first dose of study interventions

Other protocol defined exclusion criteria could apply

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Centres

Study Description

Open-label, dose escalation, monotherapy, basket trial with biomarker specific MTD expansion cohort/Phase II part.

The trial will consist of 2 parts:

1. Dose finding part to determine the MTD
2. Biomarker specific MTD expansion cohort/Phase II part to assess clinical anti-tumour activity in included tumour types

Inclusion Criteria

• Paediatric patients aged 1 year to <18 years at the time of informed consent
• Diagnosis of HGG, DIPG, low grade astrocytoma, medulloblastoma/PNET, ependymoma, neuroblastoma, RMS and tumours with ErbB deregulation
• Recurrent/refractory disease after they received at least one prior standard treatment regimen
• No effective conventional therapy exists
• Performance status >= 50% (Lansky for =<12ys; Karnofsky for >12ys)
• Further inclusion criteria apply

Exclusion Criteria

• Relevant toxicity from previous treatment
• Known pre-existing relevant cardiac , hepatic, renal, bone marrow dysfunction, ILD, keratitis
• Further exclusion criteria apply

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Centres

Study Description

This study will evaluate the safety, pharmacokinetics, and efficacy of alectinib in children and adolescents with ALK fusion-positive solid or CNS tumors for whom prior treatment has proven to be ineffective or for whom there is no satisfactory standard treatment available.

Inclusion Criteria

• Histologically confirmed diagnosis of CNS or solid tumors harboring ALK gene fusions as determined locally by an appropriately validated assay performed in a CLIA-certified or equivalently-accredited diagnostic laboratory, or centrally by a Foundation Medicine Clinical Trial Assay (CTA) or the alternative, approved central laboratory for that region
• Disease status: prior treatment proven to be ineffective (i.e. relapsed or refractory), or for whom there is no satisfactory standard treatment available. Disease should be measurable and evaluable as defined by Response Evaluation Criteria in Solid Tumors (RECIST) v 1.1, or Response Assessment in Neuro-oncology criteria (RANO) +/- bone marrow criteria for primary CNS tumors or International Neuroblastoma Response Criteria (INRC)
• Available tumor tissue for submission to the Sponsor from active disease, obtained subsequent to last anti-cancer therapy regiment administered and obtained prior to study enrollment, or willingness to undergo a core or excisional biopsy sample collection prior to enrollment
• For participants < 16 years old, Lansky Performance Status >/= 50%
• For participants >/= 16 years old, Karnofsky Performance Status >/= 50%
• Adequate bone marrow function as defined by the protocol within at least 28 days prior to initiation of study drug
• Participant and/or caregiver willingness and ability to complete clinical outcome assessments throughout the study using either electronic, paper, or interviewer methods
• For females of childbearing potential: agreement to remain abstinent (refrain from heterosexual intercourse) or use contraception, and agreement to refrain from donating eggs, as defined by the protocol
• For males who are not surgically sterile: agreement to remain abstinent (refrain from heterosexual intercourse) or use contraception, and agreement to refrain from donating sperm, as defined by the protocol

Exclusion Criteria

• Medical history of: prior use of ALK inhibitors; any gastrointestinal disorder that may affect absorption of oral medications, such as mal-absorption syndrome or status post-major bowel resection; history of organ transplant; stem cell infusions as defined by the protocol
• Substance abuse within 12 months prior to screening
• Familial or personal history of congenital bone disorders, bone metabolism alterations, or osteopenia
• Treatment with investigational therapy 28 days prior to initiation of study drug
• Liver or kidney disease as defined by the protocol
• National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) v5.0 grade >/=3 toxicities attributed to any prior therapy such as radiotherapy (excluding alopecia), which have not shown improvement and are strictly considered to interfere with alectinib
• Co-administration of anti-cancer therapies other than those administered in this study
• Active hepatitis B or C virus (HBV, HBC), or known HIV-positivity or AIDS-related illness
• Any clinically significant concomitant disease or condition that could interfere with, or for which the treatment might interfere with, the conduct of the study or the absorption of oral medications or that would, in the opinion of the Principal Investigator, pose an unacceptable risk to the participant in this study
• Any psychological, familial, sociological, or geographical condition potentially hampering compliance with the study protocol requirements and/or follow-up procedures; such conditions should be discussed with the participant before trial entry
• Planned procedure or surgery during the study except as permitted treatment as defined by the protocol
• Infection considered by the investigator to be clinically uncontrolled or of unacceptable risk to the participant upon induction of neutropenia, including participants who are, or should be, on antimicrobial agents for the treatment as active infection
• Pregnant or breastfeeding, or intending to become pregnant during the study or within 3 months after the final dose of alectinib

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Centres

Study Description

The purpose of this study is to investigate the activity of dabrafenib in combination with trametinib in children and adolescent patients with BRAF V600 mutation positive low grade glioma or relapsed or refractory high grade glioma.

Primary outcome measures are as below

1. High Grade Glioma cohort: Overall response rate as determined by central independent assessment based on MRI or CTscans using Response Assessment in Neuro-Oncology Criteria (RANO) criteria.
2. Low Grade Gioma : Overall response rate as determined by blinded central independent assessment based on MRI or CT scans using RANO criteria.

In the Low Grade Glioma cohort, patients are randomized 2:1 to either dabrafenib + trametinib or active comparator chemotherapy with vincristine and carboplatin.

Inclusion Criteria

• Diagnosis of BRAF V600 mutant High Grade glioma that has relapsed, progressed or failed to respond to frontline therapy
• Diagnosis of BRAF V600 mutant Low Grade glioma with progressive disease following surgical excision, or non-surgical candidates with necessity to begin first systemic treatment because of a risk of neurological impairment with progression.
• Confirmed measurable disease

Exclusion Criteria

• Previous treatment with dabrafenib, trametinib, other RAF inhibitor, other MEK or ERK inhibitor
• HGG patient: Cancer treatment within the past 3 weeks. LGG patient: Any systemic therapy or radiotherapy prior to enrollment
• LGG patients: history of allergic reaction or contraindications to the use of carboplatin or vincristine
• Stem cell transplant within the past 3 months
• History of heart disease
• Pregnant or lactating females

• Other protocol-defined Inclusion/exclusion may apply.

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Centres

Study Description

Brief Summary:

This pilot phase II trial studies the side effects of azacitidine and combination chemotherapy in infants with acute lymphoblastic leukemia and KMT2A gene rearrangement. Drugs used in chemotherapy, such as methotrexate, prednisolone, daunorubicin hydrochloride, cytarabine, dexamethasone, vincristine sulfate, pegaspargase, hydrocortisone sodium succinate, azacitidine, cyclophosphamide, mercaptopurine, leucovorin calcium, and thioguanine work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving more than one drug may kill more cancer cells.

Detailed Description:

PRIMARY OBJECTIVE:

I. To evaluate the tolerability of azacitidine in addition to Interfant-06 standard chemotherapy in infants with newly diagnosed acute lymphoblastic leukemia (ALL) with KMT2A gene rearrangement (KMT2A-R).

SECONDARY OBJECTIVE:

I. To evaluate the biologic activity of azacitidine by pharmacodynamic assessment of global deoxyribonucleic acid (DNA) methylation in peripheral blood mononuclear cells (PBMCs) of infants treated with azacitidine.

EXPLORATORY OBJECTIVES:

I. To determine the 5 year event-free survival (EFS) of infants with KMT2A-R treated with azacitidine in addition to Interfant-06 standard chemotherapy.

II. To correlate minimal residual disease (MRD) with outcome in the context of the protocol therapy.

III. To perform pharmacokinetic (PK) testing of azacitidine in infants.

IV. To test the expansion of infant T lymphocytes by stimulation with artificial antigen presenting cells identical to those used in chimeric antigen receptor T-cell (CART)-19 production.

V. To collect pharmacodynamic (PD) data for asparaginase activity following pegaspargase administration in infants.

OUTLINE:

INDUCTION CHEMOTHERAPY: Patients receive methotrexate intrathecally (IT) on days 1 and 29, prednisolone orally (PO) or nasogastrically (NG) three times daily (TID) on days 1-7, daunorubicin hydrochloride intravenously (IV) over 1-15 minutes on days 8-9, cytarabine IV over 30 minutes on days 8-21 and IT on day 15, dexamethasone PO, NG, or IV TID on days 8-28, vincristine sulfate IV over 1 minute on days 8, 15, 22, and 29, pegaspargase IV over 1-2 hours or intramuscularly (IM) on day 12, and hydrocortisone sodium succinate IT on days 15 and 29 in the absence of disease progression or unacceptable toxicity. Only patients with KMT2A-R continue to post-induction chemotherapy.

POST-INDUCTION CHEMOTHERAPY:

AZACITIDINE BLOCK I: Prior to CONSOLIDATION, patients receive azacitidine IV over 10-40 minutes daily for 5 days in the absence of disease progression or unacceptable toxicity.

CONSOLIDATION: Following completion of AZACITIDINE BLOCK I, patients receive cyclophosphamide IV over 30-60 minutes on days 1 and 29, mercaptopurine PO or NG daily on days 1-28, cytarabine IV or subcutaneously (SC) daily on days 3-6, 10-13, 17-20, and 24-27 and IT on day 10, methotrexate IT on day 24, and hydrocortisone sodium succinate IT on days 10 and 24 in the absence of disease progression or unacceptable toxicity.

AZACITIDINE BLOCK II: Prior to INTERIM MAINTENANCE, patients receive azacitidine as in AZACITIDINE BLOCK I

INTERIM MAINTENANCE: Following completion of AZACITIDINE BLOCK II, patients receive mercaptopurine PO or NG daily on days 1-14, methotrexate IV over 24 hours on days 1 and 8 and IT on days 2 and 9, leucovorin calcium PO or IV on days 3-4 and 10-11, hydrocortisone sodium succinate IT on days 2 and 9, cytarabine IV over 3 hours every 12 hours on days 15-16 and 22-23 for a total of 8 doses, and pegaspargase IV over 1-2 hours or IM on day 23 in the absence of disease progression or unacceptable toxicity.

AZACITIDINE BLOCK III: Prior to DELAYED INTENSIFICATION PART I, patients receive azacitidine as in AZACITIDINE BLOCK I.

DELAYED INTENSIFICATION PART I: Following completion of AZACITIDINE BLOCK III, patients receive pegaspargase IV over 1-2 hours or IM on day 1, dexamethasone PO, NG, or IV TID on days 1-14 and 15-21 with a taper on days 15-21, thioguanine PO or NG daily on days 1-28, vincristine sulfate IV over 1 minute on days 1, 8, 15, and 22, daunorubicin hydrochloride IV over 1-15 minutes on days 1, 8, 15, and 22, cytarabine IV or SC on days 2-5, 9-12, 16-19, and 23-26 and IT on days 1 and 15, and hydrocortisone sodium succinate IT on days 1 and 15 in the absence of disease progression or unacceptable toxicity.

AZACITIDINE BLOCK IV: Prior to DELAYED INTENSIFICATION PART II, patients receive azacitidine as in AZACITIDINE BLOCK I.

DELAYED INTENSIFICATION PART II: Following completion of AZACITIDINE BLOCK IV, patients receive thioguanine PO or NG daily on days 1-14, cyclophosphamide IV over 15-30 minutes on days 1 and 15, cytarabine IV or SC on days 2-5 and 9-12 in the absence of disease progression or unacceptable toxicity.

MAINTENANCE: Following DELAYED INTENSIFICATION PART II, patients receive mercaptopurine PO or NG on days 1-168, methotrexate IT on day 1 and 92 and PO once weekly on days 8-91 and 98-168, hydrocortisone sodium succinate IT on day 1, 57, and 99, and cytarabine IT on day 57. Starting on day 169, patients receive mercaptopurine PO or NG on days 1-84 and methotrexate PO once weekly. Cycles repeat every 84 days for 2 years from the start of INDUCTION CHEMOTHERAPY in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up periodically.

Inclusion Criteria

• Infants must be > 36 weeks gestational age at the time of enrollment
• Patients must have newly diagnosed B lymphoblastic leukemia (2008 World Health Organization [WHO] classification) (also termed B-precursor acute lymphoblastic leukemia) or acute leukemia of ambiguous lineage (ALUL), which includes mixed phenotype acute leukemia (MPAL); for patients with ALUL, the morphology and immunophenotype must be at least 50% B lymphoblastic
• All patients on the study will be treated with standard 5-week Induction course. After Induction, only subjects with KMT2A-rearrangement (KMT2A R) are eligible to continue on protocol therapy
• Central nervous system (CNS) status must be determined based on a sample obtained prior to the administration of any systemic or intrathecal chemotherapy, with the exception of steroid pretreatment

Exclusion Criteria

• Patients with known absence of KMT2A-rearrangement leukemia prior to enrollment
• Patients with Down syndrome
• Patients with secondary B acute lymphoblastic leukemia (B-ALL) that developed after treatment of a prior malignancy with cytotoxic chemotherapy
• With the exception of steroid pretreatment or the administration of intrathecal methotrexate or intrathecal cytarabine, receipt of any other prior cytotoxic chemotherapy for either the current diagnosis of B-ALL or any cancer diagnosed prior to the initiation of protocol therapy on AALL15P1

Multiple other inclusion and exclusion criteria could apply and will be reviewed by your treating team.

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Centres

Study Description

Brief Summary:

FIREFLY-1 is a Phase 2, multi center, open-label study to evaluate the safety and efficacy of oral pan-RAF inhibitor DAY101 in pediatric, adolescent, and young adult patients with recurrent or progressive low-grade glioma harboring a known BRAF alteration.

Detailed Description:

Approximately 60 pediatric patients will be treated with DAY101, an oral pan-RAF inhibitor, for a planned period of 26 cycles will be treated with DAY101 for a planned period of 26 cycles (approximately 24 months).

DAY101 will be administered at the recommended Phase 2 dose (RP2D) of 420 mg/m2 (not to exceed 600 mg) orally once weekly (QW) for each 28-day treatment cycle.

Treatment cycles will repeat every 28 days in the absence of disease progression or unacceptable toxicity. Patients will undergo radiographic evaluation of their disease at the end of every third cycle. Patients will continue on DAY101 until radiographic evidence of disease progression by RANO criteria as determined by treating investigator, unacceptable toxicity, patient withdrawal of consent, or death.

Patients who have radiographic evidence of disease progression may be allowed to continue DAY101 if, in the opinion of the investigator and approval by the Sponsor, the patient is deriving clinical benefit from continuing study treatment. Disease assessments for patients being treated beyond progression should continue as per regular schedule.

DAY101 is an oral pan-RAF inhibitor administered as an oral tablet at 420 mg/m2 (not to exceed 600 mg).

Inclusion Criteria

• Age 6 months to 25 years with a relapsed or progressive LGG or solid tumor with known activating RAF alteration (BRAF or CRAF/RAF1 fusion or BRAF V600 mutations (LGG only))
• Confirmation of histopathologic diagnosis of LGG or solid tumor and molecular diagnosis of activating RAF alteration (BRAF or CRAF/RAF1 fusion or BRAF V600 mutations (LGG only))
• Must have received at least one line of systemic therapy and have evidence of radiographic progression
• Must have at least 1 measurable lesion as defined by RANO criteria

Exclusion Criteria

• Patient's tumor has additional previously-known activating molecular alterations
• Patient has symptoms of clinical progression in the absence of radiographic progression
• Known or suspected diagnosis of neurofibromatosis type 1 (NF-1)
• Other inclusion/exclusion criteria as stipulated by protocol may apply

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Study Description

Difluoromethylornithine (DFMO) will be used in an open label, single agent, multicenter, study for patients with neuroblastoma in remission. In this study subjects will receive 730 Days of oral difluoromethylornithine (DFMO) at a dose of 500 to 1000 mg/m2 BID on each day of study. This study will focus on the use of DFMO in high risk neuroblastoma patients that are in remission as a strategy to prevent recurrence.

Inclusion Criteria

• All patients must have a pathologically confirmed diagnosis of neuroblastoma, < 30.99 years of age and classified as high risk at the time of diagnosis. Exception: patients who are initially diagnosed as non-high-risk neuroblastoma, but later converted (and/or relapsed) to high risk neuroblastoma are also eligible.

• All patients must be in complete remission (CR):

  1. No evidence of residual disease on scan
  2. No evidence of disease metastatic to bone marrow.
• Specific Criteria by Stratum:

Stratum 1: All patients must have completed standard upfront therapy that replicates treatment which patients who were enrolled on ANBL0032 received, including:

intensive induction chemotherapy and (if feasible) resection of primary tumor, followed by: consolidation with high-dose chemotherapy with stem cell transplant and radiotherapy, followed by: immunotherapy with Ch14.18/IL-2/GM-CSF (dinutuximab) and retinoic acid;.

All subjects on Stratum 1 must have also met the following criteria:

• A pre-transplant disease status evaluation that met International Neuroblastoma Response Criteria (INRC) for CR (complete response), VGPR (very good partial response), or PR (partial response) for primary site, soft tissue metastases and bone metastases. Patients who meet those criteria must also meet the protocol-specified criteria for bone marrow response prior to transplant as outlined below: No more than 10% tumor involvement (based on total nucleated cellular content) seen on any specimen from a bilateral bone marrow aspirate/biopsy.

Stratum 2: Neuroblastoma that is in first complete remission following standard upfront therapy different from that described for Stratum 1.

Stratum 3: Neuroblastoma that failed to have a response of at least PR following induction chemotherapy and surgical resection of the primary tumor, but that has achieved CR following additional therapy.

Stratum 4: Patients who have achieved a second or subsequent CR following relapse(s).

• Pre-enrollment tumor survey: Prior to enrollment on this study, a determination of mandatory disease staging must be performed:

  • Tumor imaging studies including
  • Bilateral bone marrow aspirates and biopsy
  • This disease assessment is required for eligibility and preferably should be done within 2 weeks prior to enrollment, but must be done within a maximum of 4 weeks before enrollment.
• Timing from prior therapy:

Stratum 1: Enrollment no later than 60 days after completion of upfront therapy, (last dose of cis-retinoic acid) with a maximum of 6 cycles of cis-retinoic acid maintenance therapy.

Stratum 2, 3 and 4: Enrollment no later than 60 days from last dose of the most recent therapy.

• Patients must have a Lansky or Karnofsky Performance Scale score of > 50% and patients must have a life expectancy of ≥ 2 months.
• All clinical and laboratory studies for organ functions to determine eligibility must be performed within 7 days prior to enrollment unless otherwise indicated below.

• Patients must have adequate organ functions at the time of registration:

  • Hematological: Total absolute phagocyte count ≥1000/μL
  • Liver: Subjects must have adequate liver function
  • Renal: Adequate renal function
• Females of childbearing potential must have a negative pregnancy test. Patients of childbearing potential must agree to use an effective birth control method. Female patients who are lactating must agree to stop breast-feeding.
• Written informed consent in accordance with institutional and FDA (food and drug administration) guidelines must be obtained from all subjects (or patients' legal representative).

Exclusion Criteria

• BSA (Body Surface Area) of <0.25 m2.
• Investigational Drugs: Subjects who are currently receiving another investigational drug are excluded from participation.
• Anti-cancer Agents: Subjects who are currently receiving other anticancer agents are not eligible. Subjects must have fully recovered from hematological and bone marrow suppression effects of prior chemotherapy.
• Infection: Subjects who have an uncontrolled infection are not eligible until the infection is judged to be well controlled in the opinion of the investigator.
• Subjects who, in the opinion of the investigator, may not be able to comply with the safety monitoring requirements of the study, or in whom compliance is likely to be suboptimal, should be excluded.

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Study Description

The purpose of the phase 1 portion (dose escalation) of the study will be to establish an optimally safe and biologically active recommended phase 2 dose (RP2D) and/or to determine maximum tolerated dose (MTD) for gilteritinib in sequential combination with fludarabine, cytarabine and granulocyte colony-stimulating factor (FLAG). The purpose of the phase 2 portion (dose expansion) is to determine complete remission (CR) rates and composite complete remission (CRc) rates after two cycles of therapy. The study will also assess safety, tolerability and toxicities of gilteritinib in combination with FLAG, evaluate FLT3 inhibition, assess pharmacokinetics (PK), perform serial measurements of minimal residual disease, obtain preliminary estimates of 1-year event free survival (EFS) and overall survival (OS) rate and assess the acceptability as well as palatability of the formulation.

One cycle is defined as 28 days of treatment. A participant completing 2 cycles in phase 1 or 2 will have the option to participate in long term treatment (LTT) with gilteritinib (for up to 2 years).

Inclusion Criteria

• Subject is aged ≥ 6 months and < 21 years of age at the time of signing informed consent and/or assent, as applicable.

  • For phase 2: Enrollment of subjects from 6 months to less than 1 year and 1 year to less than 2 years will be dependent on the establishment of recommended phase 2 dose (RP2D) in the respective for age groups during phase 1.

• Subject has a diagnosis of acute myeloid leukemia (AML) according to The French-American-British (FAB) classification with ≥ 5% blasts in the bone marrow, with or without extramedullary disease (except subjects with active central nervous system [CNS] leukemia).

  • In the phase 1 portion of the study, subject must be in first or greater relapse or refractory to induction therapy with no more than 1 attempt at remission induction.
  • For the phase 2 portion of the study, subject must be in first relapse.

• Subject has fully recovered from the acute toxic effects of all prior chemotherapy, immunotherapy, or radiotherapy prior to entering this study.

  • Myelosuppressive chemotherapy:

    • For subject who relapses while receiving cytotoxic therapy, at least 21 days must have elapsed since the completion of cytotoxic therapy and prior to screening.
    • Cytoreduction with hydroxyurea can be initiated and continued for up to 24 hours prior to the start of systemic protocol therapy (cycle 1 day -1). Subject may also receive low dose cytarabine (100 mg/m^2 per dose once daily for 5 days) for cytoreduction until 24 hours prior to cycle 1 day -1.
    • Subject who has received other FLT3 inhibitors (e.g., lestaurtinib, sorafenib, etc) is eligible for this study.
  • Hematopoietic growth factors: at least 7 days must have elapsed since the completion of therapy with a growth factor and prior to screening.
  • Biologic (anti-neoplastic agent): at least 7 days must have elapsed since the completion of therapy with a biologic agent and prior to screening. 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.

  • X-ray treatment (XRT):

    • 14 days must have elapsed for local palliative XRT for CNS chloromas and prior to screening; no washout period is necessary for other chloromas;
    • Prior to screening, 90 days must have elapsed if the subject had a prior traumatic brain injury or has received craniospinal XRT.
• For subject undergoing hematopoietic stem cell transplant (HSCT), at least 90 days must have elapsed since HSCT and subject must not have active graft-versus-host disease (GVHD).
• Subject has Karnofsky score ≥ 50 (if the subject is of ≥ 16 years of age) or Lansky score of ≥ 50 (if the subject is < 16 years of age). A score < 50 is acceptable if related to the subject's leukemia.

• Subject must meet the following criteria as indicated on the clinical laboratory tests.

  • Serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 3.0 x upper limit normal (ULN) for age
  • Total serum bilirubin ≤ 1.5 x ULN for age
  • Serum creatinine ≤ 1.5 x ULN for age or an estimated glomerular filtration rate of > 60 mL/min/1.73 m^2.

• A female subject is eligible to participate if she is not pregnant and at least 1 of the following conditions applies:

  • Not a woman of childbearing potential (WOCBP) OR
  • WOCBP who agrees to follow the contraceptive guidance throughout the treatment period and for at least 180 days after the final study drug administration.
• Female subject must agree not to breastfeed starting at Screening, and throughout the study period and for 60 days after the final study drug administration.
• Female subject must not donate ova starting at Screening and throughout the study, and for 180 days after the final study drug administration.
• A male subject with female partner(s) of childbearing potential must agree to use contraception during the treatment period and for at least 180 days after the final study drug administration. (in United Kingdom, Germany and Canada)
• A male subject must not donate sperm during the treatment period and for at least 120 days after the final study drug administration.
• Male subject with a pregnant or breastfeeding partner(s) must agree to remain abstinent or use a condom for the duration of the pregnancy or time partner is breastfeeding throughout the study period and for 180 days after the final study drug administration. (United Kingdom, Germany and Canada)
• Subject and subject's parent(s) or legal guardian agrees not to participate in another interventional study while on treatment.
• In United Kingdom, Germany and Canada: Live Vaccines - At least 6 weeks must have elapsed since the administration of the last dose of a live vaccine and prior to the initiation of study treatment (cycle 1, day -1)
• Phase 1: Subject is positive for FLT3 (ITD and/or tyrosine kinase domain [TKD]) mutation in bone marrow or blood as determined by the local institution.
• Phase 2: Subject is positive for the FLT3 (ITD) mutation in bone marrow or blood as determined by the local institution.

Exclusion Criteria

• Subject has active CNS leukemia.

• Subject has uncontrolled or significant cardiovascular disease, including:

  • Diagnosed or suspected congenital long QT syndrome or any history of clinically significant ventricular arrhythmias (such as ventricular tachycardia, ventricular fibrillation, or Torsades de Pointes (TdP)); any history of arrhythmia will be discussed with the sponsor prior to subject's entry into the study
  • Prolonged Fridericia's Correction Formula (QTcF) interval on pre-entry electrocardiogram (ECG) (≥ 450 ms)
  • Any history of second or third degree heart block (may be eligible if the subject currently has a pacemaker)
  • Heart rate < 50 beats/minute on pre-entry ECG
  • Uncontrolled hypertension
  • Complete left bundle branch block
• Subject has systemic fungal, bacterial, viral or other infection that is exhibiting ongoing signs/symptoms related to the infection without improvement despite appropriate antibiotics or other treatment. The subject needs to be off pressors and have negative blood cultures for 48 hours.
• Subject is receiving or plans to receive concomitant chemotherapy, radiation therapy, or immunotherapy other than as specified in the protocol.
• Subject has active clinically significant graft-versus-host disease (GVHD) or is on treatment with systemic corticosteroids and is receiving > 0.5 mg/kg of prednisone (or equivalent) daily dose for GVHD.
• Subject has active malignant tumors other than AML.
• Subject has any significant concurrent disease, illness, psychiatric disorder or social issue that would compromise subject safety or compliance; interfere with consent, study participation, follow-up or interpretation of study results.
• Subject has hypokalemia and/or hypomagnesemia at Screening (defined as values below institutional lower limit of normal [LLN]). Repletion of potassium and magnesium levels during the screening period is allowed.
• Subject requires treatment with concomitant drugs that are strong inducers of cytochrome P450 (CYP)3A/P-glycoprotein (P-gp).
• Subject is known to have human immunodeficiency virus infection.
• Subject has active hepatitis B or C, or other active hepatic disorder.
• Subject must wait for at least 5 half-lives after stopping therapy with any investigational agent and before starting gilteritinib.
• In United Kingdom, Germany and Canada: Subject has a known or suspected hypersensitivity to gilteritinib, cytarabine, fludarabine, granulocyte colony-stimulating factor (G-CSF) or any components of the formulation used.