A Study of CPX-351 (Vyxeos™) With Quizartinib for the Treatment of FLT3-ITD Mutation-Positive Acute Myeloid Leukemia

• Sponsor: SCRI Development Innovations, LLC (Other)
• Overall Status: Terminated
• CT.gov ID: NCT04209725
• Collaborator: (none)
• Enrollment: 1
• Locations: 5
• Arm: 1
• Actual Duration (Months): 10.5
• Patients Per Site: 0.2
• Patients Per Site Per Month: 0

Study Details

Study Description

Brief Summary

This is a research study to be done at multiple sites in participants with advanced acute myeloid leukemia (AML) that have a mutation in Fms-like tyrosine kinase-3 internal tandem duplications (FLT3-ITD). This study is to learn more about an investigational drug, quizartinib, being tested with the anti-cancer medicine CPX-351 (also called Vyxeos™), which is approved and widely used to treat AML.

The purpose of this study is to assess the safety, tolerability and survival of patients receiving the combination of CPX-351 and quizartinib.

Condition or Disease	Intervention/Treatment	Phase
Leukemia, Myeloid, Acute	Drug: CPX-351; Drug: Quizartinib	Phase 2

Detailed Description

This is an open-label, two-part Phase II clinical trial in patients with relapsed or refractory FLT3-ITD mutation-positive acute myeloid leukemia (AML). The study is designed to assess the safety and tolerability as well as the efficacy of administering CPX-351 (cytarabine:daunorubicin liposome complex) with quizartinib. CPX-351 is a formulation of two drugs, cytarabine and daunorubicin, that is administered as the first part of treatment to get rid of as many leukemia cells in your bone marrow as possible. Quizartinib is an investigational drug made of a protein that inhibits FLT3 and will be given after CPX-351 has been given. The plan for administration is divided into three phases: induction, consolidation, and maintenance.

Study Design

• Study Type: Interventional
• Actual Enrollment: 1 participants
• Allocation: N/A
• Intervention Model: Single Group Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: A Phase II Study Assessing CPX-351 (Vyxeos™) With Quizartinib for the Treatment of Relapsed or Refractory FLT3-ITD Mutation-Positive AML
• Actual Study Start Date: Jun 3, 2020
• Actual Primary Completion Date: Apr 20, 2021
• Actual Study Completion Date: Apr 20, 2021

Arms and Interventions

Arm

Intervention/Treatment

Experimental: CPX-351 and Quizartinib treatment Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance.

Drug: CPX-351; Given during the induction and consildation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase.; Other Names: Vyxeos ; Drug: Quizartinib; Given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.

Outcome Measures

Primary Outcome Measures

1. Number of Patients With Treatment Related Adverse Events After Taking CPX-351 and Quizartinib [Collected during treatment and for 30 days after last dose, approximately 35 total days for the 1 patient treated.]

   Counting the number of patients with treatment related adverse events as a measure of safety and tolerability.

2. Number of Patients With an Overall Response Taking CPX-351 and Quizartinib [from cycle 1 day 1 (each cycle is 28 days) until disease progression for up to 2 years post treatment]

   Overall response is defined by the International Working Group response criteria (Cheson et al 2003) as having a complete remission (CR) - a complete morphologic response with complete blood count recovery absolute neutrophil count ≥1000/μL and platelet count ≥100,000/μL) or a complete morphologic response with an incomplete blood count recovery (CRi) - absolute neutrophil count <1000/μL and/or platelet count <100,000/μL)

Secondary Outcome Measures

1. Median Time to Platelet Count Recovery [from cycle 1 Day 1 (each cycle is 28 days) for up to 24 months]

   Time to platelet recovery is defined as the time to when the peripheral blood platelet count is >50, 000/ μL

2. Median Time to Absolute Neutrophil Count (ANC) Recovery [from Cycle 1 Day 1 (each cycle is 28 days) for up to 24 months]

   Time to neutrophil recovery is defined as the time to when the peripheral blood ANC is ≥500/μL

3. Number of Patients Proceeding to an Allogeneic Hematopoietic Cell Transplantation (alloHCT) [up to 60 days after consolidation therapy]

   Patients receiving allogeneic hematopoietic cell transplantation (alloHCT) following treatment in induction and consolidation therapies.

4. Median Time to Disease Progression [from diagnosis of relapse or refractory AML until disease progression for up to 2 years post treatment]

   Time to disease progression, confirmed by bone marrow biopsy.

5. Event-free Survival Time [from day 1 for up to 4 years]

   Defined as the number of days until evidence of PD by bone marrow biopsy/aspirate, or death, regardless of cause. Patients who are alive without a disease response assessment of relapsed disease will be censored at the last adequate disease assessment date. Patients without a disease response assessment will be censored at the first date of treatment.

6. Overall Survival (OS) [Up to 8 months]

   Overall survival is defined as the time from the first date of treatment until death as a result of any cause. For OS time, patients that have not died or are lost to follow-up will be censored at the date the patient was last known to be alive or the date of last contact.

7. Number of Patients Who Develop Late Responses [up to 4 years]

   Late responses as defined by the International Working Group response criteria (Cheson et al 2003) as having a complete remission (CR) - a complete morphologic response with complete blood count recovery absolute neutrophil count ≥1000/μL and platelet count ≥100,000/μL) or a complete morphologic response with an incomplete blood count recovery (CRi) - absolute neutrophil count <1000/μL and/or platelet count <100,000/μL

8. Number of Patients Who Can Receive Consolidation and Maintenance Therapy [approximately 3 months]

   Patients who proceed through induction to next stages of consolidation and maintenance

9. Treatment-related Mortality Rate [Observed during treatment and for 30 days after last dose, so approximately 35 days for the 1 patient treated.]

   As determined by the number of treatment related deaths during study treatment

10. Percentage of Patients Who Achieve a PR or Molecular Complete Remission [from cycle 1 day 1 (each cycle is 28 days) until disease progression for up to 2 years post treatment]

    A PR is defined as persistent disease by morphology but with a >50% reduction in the blast count/cellularity ratio compared to the most recent BM biopsy prior to treatment. A molecular complete remission is defined as no evidence of disease by bone marrow biopsy/aspirate by morphology, immunohistochemistry, or flow cytometry, and FLT3 mutation by MRD analysis.

11. Mean Elapsed Time for Patients to Achieve Molecular CR [From Date of First Treatment to up to 2 years]

    The mean time to achievement of a complete morphologic CR with persistent disease detected by flow or molecular minimal residual disease (MRD) analysis.

12. Quizartinib Tolerability After Allogeneic Hematopoietic Cell Transplantation (alloHCT) or Donor Lymphocyte Infusion (DLI) [From Date of First Treatment, up to 2 years]

    Defined as the number of patients who received quizartinib and proceeded to alloHCT or DLI as part of this study and had treatment-related adverse events

Eligibility Criteria

Criteria

• Ages Eligible for Study: 18 Years to 80 Years
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Inclusion Criteria:

1. Written informed consent form (ICF), according to local guidelines, signed by the patient or by a legal guardian prior to the performance of any study-related screening procedures.

2. Patients with the following types of AML with >5% blasts:

• Relapsed FLT3-ITD mutation-positive AML, diagnosed by bone marrow (BM) biopsy with FLT3 mutation by polymerase chain reaction (PCR)

• Refractory FLT3-ITD mutation-positive AML, diagnosed by BM biopsy with FLT3 mutation by PCR

• Relapsed or refractory FLT3-ITD mutation-positive AML after HCT, diagnosed by BM biopsy with FLT3 mutation by PCR

• Relapsed or refractory AML with de novo FLT3-ITD mutation, diagnosed by BM biopsy with FLT3 mutation by PCR

• Relapsed or refractory AML after HCT with de novo FLT3-ITD mutation, diagnosed by BM biopsy with FLT3 mutation by PCR

1. First-line therapy must have contained a standard induction chemotherapy (e.g. 7+3, FLAG-IDA, FLAG, CLAG, MEC, hypomethylating agent with venetoclax) with or without receiving a prior FLT3 inhibitor (e.g. midostaurin) or multi-tyrosine kinase inhibitor (e.g. sorafenib). All patients who relapsed after an alloHCT are included, except patients with active graft-versus-host disease (GVHD) requiring >10 mg prednisone.

2. Patients must be able to swallow and retain oral medication.

3. Eastern Cooperative Oncology Group (ECOG) Performance Status score of 0, 1, or 2 (Appendix A).

4. Adequate renal and hepatic parameters (aspartate aminotransferase [AST], alanine aminotransferase [ALT] ≤2.5 institutional upper limit of normal [ULN]; total bilirubin ≤2.0 institutional ULN; serum creatinine [Cr] ≤2.0). In patients with suspected liver infiltration, ALT can be ≤5 institutional ULN.

Exclusion Criteria:

1. Acute promyelocytic leukemia (t[15;17])

2. Female patients who are lactating or have a positive serum pregnancy test during the screening period. Female patients of childbearing potential who are not willing to employ highly effective birth control (as defined in Appendix C of protocol) from screening to 6 months following the last dose of CPX-351 and/or quizartinib.

3. Evidence of active and uncontrolled bacterial, fungal, parasitic, or viral infection. Infections are considered controlled if appropriate therapy has been instituted and, at the time of screening, no signs of active infection progression are present. This is assessed by the site clinicians, including an infectious disease consulting physician, if requested by the Principal Investigator (PI), regarding adequacy of therapy. These infections include, but are not limited to:

• Known human immunodeficiency virus (HIV) infection

• Active hepatitis B or C infection with rising transaminase values

• Active tuberculosis infection

1. History of hypersensitivity to cytarabine, daunorubicin, or an FLT3 inhibitor

2. Any patients with known significant impairment in gastrointestinal (GI) function or GI disease that my significantly alter the absorption of quizartinib.

3. Psychological, familial, sociological, or geographical conditions that do not permit compliance with the protocol.

4. Uncontrolled or significant cardiovascular disease, including any of the following:

• Bradycardia of less than 50 beats per minute, unless the patient has a pacemaker

• QTcF interval using Fridericia's correction factor (QTcF) interval prolongation, defined as >450msec at screening and prior to first administration of quizartinib

• Diagnosis of or suspicion of long QT syndrome (including family history of long QT syndrome)

• Systolic blood pressure ≥180 mmHg or diastolic blood pressure ≥110 mmHg

• History of clinically relevant ventricular arrhythmias (i.e., ventricular tachycardia, ventricular fibrillation or Torsades de pointes)

• History of second or third degree heart block without a pacemaker

• Right bundle branch and left anterior hemiblock (bifascicular block), complete left bundle branch block

• Ejection fraction <50% by transthoracic echocardiogram (TTE) or multigated acquisition (MUGA) scan

• History of uncontrolled angina pectoris or myocardial infarction within 6 months prior to Screening

1. History of New York Heart Association Class 3 or 4 heart failure

2. Prior anthracycline (or equivalent) cumulative exposure ≥368 mg/m2 daunorubicin (or equivalent)

3. Any serious underlying medical condition that, in the opinion of the Investigator or Medical Monitor, would impair the ability to receive or tolerate the planned treatment.

4. Patients with inadequate adequate pulmonary function will be excluded. Inadequate pulmonary function is defined as requiring supplemental O2, or diffusing capacity of the lungs for carbon monoxide [DLCO] <40%.

5. Active acute or chronic GVHD requiring prednisone >10 mg or equivalent.

Contacts and Locations

Locations

	Site	City	State	Country	Postal Code
1	Colorado Blood Cancer Institute	Denver	Colorado	United States	80218
2	HCA Midwest	Kansas City	Missouri	United States	64132
3	Tennessee Oncology	Nashville	Tennessee	United States	37203
4	St. David's South Austin Medical Center	Austin	Texas	United States	78704
5	Texas Transplant Institute	San Antonio	Texas	United States	78229

Sponsors and Collaborators

• SCRI Development Innovations, LLC

Investigators

• Study Chair: Michael Tees, MD, MPH, Colorado Blood Cancer Institute

Study Documents (Full-Text)

• Study Protocol and Statistical Analysis Plan - Aug 10, 2020

More Information

Publications

None provided.

• Responsible Party: SCRI Development Innovations, LLC
• ClinicalTrials.gov Identifier: NCT04209725
• Other Study ID Numbers: SCRI AML 48
• First Posted: Dec 24, 2019
• Last Update Posted: Jun 3, 2022
• Last Verified: May 1, 2022

• Studies a U.S. FDA-regulated Drug Product: Yes
• Studies a U.S. FDA-regulated Device Product: No
• Keywords provided by SCRI Development Innovations, LLC: FLT3
• Additional relevant MeSH terms: Leukemia; Leukemia, Myeloid; Leukemia, Myeloid, Acute

Study Results

Participant Flow

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Period Title: Overall Study
STARTED	1
COMPLETED	0
NOT COMPLETED	1

Baseline Characteristics

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Overall Participants	1
Age (Count of Participants)
<=18 years	0 0%
Between 18 and 65 years	1 100%
>=65 years	0 0%
Sex: Female, Male (Count of Participants)
Female	1 100%
Male	0 0%
Race (NIH/OMB) (Count of Participants)
American Indian or Alaska Native	0 0%
Asian	0 0%
Native Hawaiian or Other Pacific Islander	0 0%
Black or African American	0 0%
White	1 100%
More than one race	0 0%
Unknown or Not Reported	0 0%
Region of Enrollment (participants) [Number]
United States	1 100%

Outcome Measures

1. Primary Outcome

Title	Number of Patients With Treatment Related Adverse Events After Taking CPX-351 and Quizartinib
Description	Counting the number of patients with treatment related adverse events as a measure of safety and tolerability.
Time Frame	Collected during treatment and for 30 days after last dose, approximately 35 total days for the 1 patient treated.

Outcome Measure Data

Analysis Population Description

1 patient was treated on study and did have treatment-related adverse events

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	1
Count of Participants [Participants]	1 100%

2. Primary Outcome

Title	Number of Patients With an Overall Response Taking CPX-351 and Quizartinib
Description	Overall response is defined by the International Working Group response criteria (Cheson et al 2003) as having a complete remission (CR) - a complete morphologic response with complete blood count recovery absolute neutrophil count ≥1000/μL and platelet count ≥100,000/μL) or a complete morphologic response with an incomplete blood count recovery (CRi) - absolute neutrophil count <1000/μL and/or platelet count <100,000/μL)
Time Frame	from cycle 1 day 1 (each cycle is 28 days) until disease progression for up to 2 years post treatment

Outcome Measure Data

Analysis Population Description

Patients must have received at least one dose of CPX-351 or quizartinib, who have an adequate baseline disease assessment, and an adequate post-baseline assessment and who discontinue due to death or PD prior to their first assessment. The 1 patient that was enrolled discontinued study treatment in Cycle 1 prior to receiving Quizartinib, no post-baseline assessment was done. Therefore, no patients were analyzed.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

3. Secondary Outcome

Title	Median Time to Platelet Count Recovery
Description	Time to platelet recovery is defined as the time to when the peripheral blood platelet count is >50, 000/ μL
Time Frame	from cycle 1 Day 1 (each cycle is 28 days) for up to 24 months

Outcome Measure Data

Analysis Population Description

The 1 patient that was enrolled discontinued study treatment in Cycle 1 prior to receiving Quizartinib, no post-baseline assessment was done. Therefore, no patients were analyzed.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

4. Secondary Outcome

Title	Median Time to Absolute Neutrophil Count (ANC) Recovery
Description	Time to neutrophil recovery is defined as the time to when the peripheral blood ANC is ≥500/μL
Time Frame	from Cycle 1 Day 1 (each cycle is 28 days) for up to 24 months

Outcome Measure Data

Analysis Population Description

The 1 patient that was enrolled discontinued study treatment in Cycle 1 prior to receiving Quizartinib, no post-baseline assessment was done. Therefore, no patients were analyzed.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

5. Secondary Outcome

Title	Number of Patients Proceeding to an Allogeneic Hematopoietic Cell Transplantation (alloHCT)
Description	Patients receiving allogeneic hematopoietic cell transplantation (alloHCT) following treatment in induction and consolidation therapies.
Time Frame	up to 60 days after consolidation therapy

Outcome Measure Data

Analysis Population Description

The patient discontinued treatment early and didn't follow induction and consolidation therapies to reach the alloHCT. Therefore no patients were analyzed.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

6. Secondary Outcome

Title	Median Time to Disease Progression
Description	Time to disease progression, confirmed by bone marrow biopsy.
Time Frame	from diagnosis of relapse or refractory AML until disease progression for up to 2 years post treatment

Outcome Measure Data

Analysis Population Description

The 1 patient that was enrolled discontinued study treatment in Cycle 1 prior to receiving Quizartinib, no post-baseline evaluation was done. Therefore, no patients were analyzed.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

7. Secondary Outcome

Title	Event-free Survival Time
Description	Defined as the number of days until evidence of PD by bone marrow biopsy/aspirate, or death, regardless of cause. Patients who are alive without a disease response assessment of relapsed disease will be censored at the last adequate disease assessment date. Patients without a disease response assessment will be censored at the first date of treatment.
Time Frame	from day 1 for up to 4 years

Outcome Measure Data

Analysis Population Description

The 1 patient that was enrolled discontinued study treatment in Cycle 1 prior to receiving Quizartinib. No post-baseline assessment was performed and was therefore censored at Date of First Treatment. Therefore, no patients were analyzed.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

8. Secondary Outcome

Title	Overall Survival (OS)
Description	Overall survival is defined as the time from the first date of treatment until death as a result of any cause. For OS time, patients that have not died or are lost to follow-up will be censored at the date the patient was last known to be alive or the date of last contact.
Time Frame	Up to 8 months

Outcome Measure Data

Analysis Population Description

Only 1 patient was treated.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	1
Number [months]	7.7

9. Secondary Outcome

Title	Number of Patients Who Develop Late Responses
Description	Late responses as defined by the International Working Group response criteria (Cheson et al 2003) as having a complete remission (CR) - a complete morphologic response with complete blood count recovery absolute neutrophil count ≥1000/μL and platelet count ≥100,000/μL) or a complete morphologic response with an incomplete blood count recovery (CRi) - absolute neutrophil count <1000/μL and/or platelet count <100,000/μL
Time Frame	up to 4 years

Outcome Measure Data

Analysis Population Description

The 1 patient that was enrolled discontinued study treatment in Cycle 1 prior to receiving Quizartinib, no post-baseline assessment was done. Therefore, no patients were analyzed.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

10. Secondary Outcome

Title	Number of Patients Who Can Receive Consolidation and Maintenance Therapy
Description	Patients who proceed through induction to next stages of consolidation and maintenance
Time Frame	approximately 3 months

Outcome Measure Data

Analysis Population Description

The patient discontinued treatment early and didn't follow induction and consolidation therapies to reach the alloHCT or maintenance therapy.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	1
Count of Participants [Participants]	0 0%

11. Secondary Outcome

Title	Treatment-related Mortality Rate
Description	As determined by the number of treatment related deaths during study treatment
Time Frame	Observed during treatment and for 30 days after last dose, so approximately 35 days for the 1 patient treated.

Outcome Measure Data

Analysis Population Description

The 1 enrolled patient did not have a treatment-related death.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	1
Count of Participants [Participants]	0 0%

12. Secondary Outcome

Title	Percentage of Patients Who Achieve a PR or Molecular Complete Remission
Description	A PR is defined as persistent disease by morphology but with a >50% reduction in the blast count/cellularity ratio compared to the most recent BM biopsy prior to treatment. A molecular complete remission is defined as no evidence of disease by bone marrow biopsy/aspirate by morphology, immunohistochemistry, or flow cytometry, and FLT3 mutation by MRD analysis.
Time Frame	from cycle 1 day 1 (each cycle is 28 days) until disease progression for up to 2 years post treatment

Outcome Measure Data

Analysis Population Description

The 1 patient that was enrolled discontinued study treatment in Cycle 1 prior to receiving Quizartinib, no post-baseline assessment was done. Therefore, no patients were analyzed.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

13. Secondary Outcome

Title	Mean Elapsed Time for Patients to Achieve Molecular CR
Description	The mean time to achievement of a complete morphologic CR with persistent disease detected by flow or molecular minimal residual disease (MRD) analysis.
Time Frame	From Date of First Treatment to up to 2 years

Outcome Measure Data

Analysis Population Description

The 1 patient enrolled discontinued in Cycle 1. No post-baseline assessment therefore no patients analyzed

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

14. Secondary Outcome

Title	Quizartinib Tolerability After Allogeneic Hematopoietic Cell Transplantation (alloHCT) or Donor Lymphocyte Infusion (DLI)
Description	Defined as the number of patients who received quizartinib and proceeded to alloHCT or DLI as part of this study and had treatment-related adverse events
Time Frame	From Date of First Treatment, up to 2 years

Outcome Measure Data

Analysis Population Description

The 1 patient enrolled discontinued the study prior to receiving their first dose of quizartinib. Therefore no patients analyzed.

Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
Measure Participants	0

Adverse Events

Time Frame	Collected for 30 days after last dose, so approximately 35 days for the 1 patient treated.
Adverse Event Reporting Description	All patients who received at least one dose of protocol treatment were followed for safety. Adverse events and serious adverse events were collected from day of first dose to 30 days after last protocol treatment and graded according to National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 4.03.
Arm/Group Title	CPX-351 and Quizartinib Treatment
Arm/Group Description	Participants with FLT3 mutation positive AML will be given CPX-351 followed by quizartinib in three phases: induction, consolidation, and maintenance. CPX-351: To be given during the induction and consolidation phase and will consist of 44 mg/m^2 daunorubicin with 100 mg/m^2 cytarabine administered intravenously on Days 1, 3, and 5 during induction phase and Days 1 and 3 of consolidation phase. Quizartinib: To be given during induction, consolidation, and maintenance phases and will be taken orally at a dose of 30mg on Days 8-21 of induction phase, Days 6-21 of consolidation phase, and daily in maintenance phase.
All Cause Mortality
	CPX-351 and Quizartinib Treatment
	Affected / at Risk (%)	# Events
Total	1/1 (100%)
Serious Adverse Events
	CPX-351 and Quizartinib Treatment
	Affected / at Risk (%)	# Events
Total	0/1 (0%)
Other (Not Including Serious) Adverse Events
	CPX-351 and Quizartinib Treatment
	Affected / at Risk (%)	# Events
Total	1/1 (100%)
Blood and lymphatic system disorders
Anaemia	1/1 (100%)	2
Febrile neutropenia	1/1 (100%)	1
Neutropenia	1/1 (100%)	2
Thrombocytopenia	1/1 (100%)	1
Gastrointestinal disorders
Diarrhoea	1/1 (100%)	1
Constipation	1/1 (100%)	1
General disorders
Chills	1/1 (100%)	1
Mucosal inflammation	1/1 (100%)	1
Investigations
Electrocardiogram QT prolonged	1/1 (100%)	1
Metabolism and nutrition disorders
Hypocalcaemia	1/1 (100%)	1
Nervous system disorders
Headache	1/1 (100%)	1
Psychiatric disorders
Insomnia	1/1 (100%)	1
Vascular disorders
Orthostatic hypotension	1/1 (100%)	1

Limitations/Caveats

[Not Specified]

More Information

Certain Agreements

Principal Investigators are NOT employed by the organization sponsoring the study.

The only disclosure restriction on the PI is that the sponsor can review results communications prior to public release and can embargo communications regarding trial results for a period that is more than 60 days but less than or equal to 180 days. The sponsor cannot require changes to the communication and cannot extend the embargo.