Dose Escalation Study Investigating the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics of ASP2215 in Patients With Relapsed or Refractory Acute Myeloid Leukemia

Acute Myeloid Leukemia Clinical Trial

Official title:

A Phase 1/2 Open-Label, Dose Escalation Study Investigating the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of ASP2215 in Patients With Relapsed or Refractory Acute Myeloid Leukemia

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02014558
• Other study ID #: 2215-CL-0101
• Status: Completed
• Phase: Phase 1/Phase 2
• Start date: October 9, 2013
• Est. completion date: March 7, 2018

Study information

• Verified date: May 2019
• Source: Astellas Pharma Inc
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The objective of this study was to assess the safety and tolerability, including the maximum tolerated dose, of gilteritinib in participants with relapsed or treatment-refractory acute myeloid leukemia (AML). This study also determined the pharmacokinetic (PK) parameters of gilteritinib.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 265
• Est. completion date: March 7, 2018
• Est. primary completion date: August 4, 2017
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Subject is defined as morphologically documented primary or secondary AML by the World Health Organization (WHO) criteria (2008) and fulfills one of the following:

• Refractory to at least 1 cycle of induction chemotherapy

• Relapsed after achieving remission with a prior therapy

• Subject has an Eastern Cooperative Oncology Group (ECOG) performance status = 2.

• Subject's interval from prior treatment to time of study drug administration is at least 2 weeks for cytotoxic agents (except hydroxyurea given for controlling blast cells), or at least 5 half-lives for prior experimental agents or noncytotoxic agents.

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

• Serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) <2.5 x institutional upper limit normal (ULN)

• Total serum bilirubin < 1.5x institutional ULN

• Serum creatinine < 1.5 x institutional ULN or an estimated glomerular filtration rate (eGFR) of > 50 ml/min as calculated by the Modification of Diet in Renal Disease (MDRD) equation.

• Subject agrees not to participate in another interventional study while on treatment.

Exclusion Criteria:

• Subject was diagnosed as acute promyelocytic leukemia (APL).

• Subject has BCR-ABL-positive leukemia (chronic myelogenous leukemia in blast crisis).

• Subject has active malignant tumors other than AML or Myelodysplastic syndrome (MDS).

• Subject has persistent nonhematological toxicities of >= Grade 2 (Common Terminology Criteria for Adverse Events v4), with symptoms and objective findings, from prior AML treatment (including chemotherapy, kinase inhibitors, immunotherapy, experimental agents, radiation, or surgery).

• Subject has had hematopoietic stem cell transplant (HSCT) and meets any of the following:

• Is within 2 months of transplant from C1D1

• Has clinically significant graft-versus-host disease requiring treatment

• Has >= Grade 2 persistent non-hematological toxicity related to the transplant. Donor lymphocytes infusion (DLI) is not permitted <= 30 days prior to study registration or during the first cycle of treatment on the study in Cohort 1 and first two cycles of the treatment in Cohort 2

• Subject has clinically active central nervous system leukemia

• Subject has disseminated intravascular coagulation abnormality (DIC)

• Subject has had major surgery within 4 weeks prior to the first study dose.

• Subject has had radiation therapy within 4 weeks prior to the first study dose

• Subject has congestive heart failure New York Heart Association (NYHA) class 3 or 4, or subject with a history of congestive heart failure NYHA class 3 or 4 in the past, unless a screening echocardiogram performed within 3 months prior to study entry results in a left ventricular ejection fraction that is = 45%

• Subject requires treatment with concomitant drugs that are strong inhibitors or inducers of Cytochrome P450-isozyme3A4 (CYP3A4) with the exception of antibiotics, antifungals, and antivirals that are used as standard of care post-transplant or to prevent or treat infections and other such drugs that are considered absolutely essential for the care of the subject

• Subject required treatment with concomitant drugs that target serotonin 5HT1R or 5HT2BR receptors or sigma nonspecific receptor with the exception of drugs that are considered absolutely essential for the care of the subject.

• Subject has an active uncontrolled infection

• Subject is known to have human immunodeficiency virus infection

• Subject has active hepatitis B or C, or other active hepatic disorder

Related Conditions & MeSH terms

• Acute Myeloid Leukemia
• Leukemia
• Leukemia, Myeloid
• Leukemia, Myeloid, Acute

Intervention

Drug:
• Gilteritinib
Participants received gilteritinib oral tablets (10 mg, 40 mg or 100 mg, depending on the dose) once daily without food allowed for at least 2 hours before and 1 hour after dosing starting from day -2 and day of cycle 1, for continuous 28-day cycles.
• Voriconazole
Participants received 200 mg voriconazole tablets daily every 12 hours starting from day 16 of cycle 1 through day 1 of cycle 2.
• Midazolam
Participants received a single oral dose of 2 mg of midazolam syrup on day -1 and day 15 of cycle 1.
• Cephalexin
Participants received a single oral dose of 500 mg cephalexin tablet or capsule on day -1 and day 15 of cycle 1.

Locations

Country	Name	City	State
Germany	Site DE49002	Berlin
Germany	Site DE49004	Dresden
Italy	Site IT39001	Bologna
United States	Site US10003	Baltimore	Maryland
United States	Site US10012	Baltimore	Maryland
United States	Site US10021	Birmingham	Alabama
United States	Site US10010	Buffalo	New York
United States	Site US10017	Charleston	South Carolina
United States	Site US10001	Chicago	Illinois
United States	Site US10015	Chicago	Illinois
United States	Site US10014	Cleveland	Ohio
United States	Site US10022	Duarte	California
United States	Site US10026	Fairfax	Virginia
United States	Site US10020	Hackensack	New Jersey
United States	Site US10018	Hershey	Pennsylvania
United States	Site US10002	Houston	Texas
United States	Site US10008	Los Angeles	California
United States	Site US10006	Minneapolis	Minnesota
United States	Site US10007	Nashville	Tennessee
United States	Site US10009	New York	New York
United States	Site US10013	New York	New York
United States	Site US10019	New York	New York
United States	Site US10004	Philadelphia	Pennsylvania
United States	Site US10011	Rochester	Minnesota
United States	Site US10005	San Francisco	California
United States	Site US10023	Scottsdale	Arizona

Sponsors (1)

Lead Sponsor	Collaborator
Astellas Pharma Global Development, Inc.

Countries where clinical trial is conducted

United States,  Germany,  Italy, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Number of Participants With Dose Limiting Toxicities (DLTs)	To determine the maximum tolerated dose, safety was assessed by DLTs, defined as any grade = 3 non-hematologic or extramedullary toxicity that occurred within 30 days starting with the first dose taken on day -2, and included the first treatment cycle in the dose escalation phase and in the first treatment cycle (28 days) in the dose expansion phase, that was considered to be possibly or probably related to study drug. Exceptions to this were the following: (1) Alopecia, anorexia or fatigue, (2) Grade 3 nausea and/or vomiting if not required tube feeding or total parenteral nutrition, or diarrhea if not required or prolonged hospitalization that was managed to grade = 2 with standard antiemetic or antidiarrheal medications used at prescribed dose within 7 days of onset, (3) Grade 3 fever with neutropenia, with or without infection, (4) Grade 3 infection.	From first dose up to end of cycle 1 (30 days)
Primary	Number of Participants With Adverse Events (AEs)	Safety was assessed by AEs, which included abnormalities identified during a medical test (e.g. laboratory tests, vital signs, electrocardiogram, etc.) if the abnormality induced clinical signs or symptoms, needed active intervention, interruption or discontinuation of study medication or was clinically significant. A treatment-emergent AE (TEAE) was defined as an AE observed after starting administration of the study drug up to 30 days after last dose of study drug (for participants who underwent hematopoietic stem cell transplantation [HSCT]: defined as AEs observed after starting study drug until the last dose before on study HSCT plus 30 days, and AEs that began after resumption of gilteritinib and within 30 days after the last dose of gilteritinib). AEs were graded using the National Cancer Institute Common Terminology Criteria for Adverse Events Version 4.03 (1-Mild, 2-Moderate, 3-Severe, 4-LifeThreatening, 5-Death).	From first dose of study drug up to 30 days after last dose of study drug (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Primary	Area Under the Concentration-time Curve Over the 24-Hour Dosing Interval (AUC24) After Single and Multiple Doses of Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -2 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose
Primary	Maximum Concentration (Cmax) After Single and Multiple Doses of Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -2 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose
Primary	Area Under the Concentration-time Curve From the Time of Dosing to the Last Measurable Concentration (AUClast) After Single and Multiple Doses of Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -2 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose
Primary	Time to Observed Cmax (Tmax) After Single and Multiple Doses of Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -2 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose
Primary	Terminal Elimination Half-life (t1/2) After Multiple Doses of Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose
Primary	Accumulation Ratio After Multiple Doses of Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose
Secondary	Percentage of Participants With Complete Remission (CR) During the First 2 Cycles	CR was defined according to modified Cheson criteria (2003), using centrally evaluated myeloblast counts from bone marrow aspirate/biopsy assessments and centrally evaluated hematology results; if neither central bone marrow aspirate nor biopsy was available, myeloblast was imputed with locally evaluated bone marrow aspirate/biopsy assessments (derived response). Participants were classified as being in CR when they had bone marrow regenerating normal hematopoietic cells, achieved a morphologic leukemia-free state, had an absolute neutrophil count (ANC) > 1 x 10^9/L, platelet count = 100 x 10^9/L, normal marrow differential with < 5% blasts, had been red blood cell (RBC) and platelet transfusion independent (defined as 1 week without RBC transfusion and 1 week without platelet transfusion), had no presence of Auer rods and no evidence of extramedullary leukemia, and blast counts in peripheral blood had been = 2%. Exact 95% confidence interval was estimated using binomial distribution.	During the first 2 cycles (56 days)
Secondary	Percentage of Participants With CR During Treatment	CR was defined according to modified Cheson criteria (2003), using centrally evaluated myeloblast counts from bone marrow aspirate/biopsy assessments and centrally evaluated hematology results; if neither central bone marrow aspirate nor biopsy was available, myeloblast was imputed with locally evaluated bone marrow aspirate/biopsy assessments (derived response). Participants were classified as being in CR when they had bone marrow regenerating normal hematopoietic cells, achieved a morphologic leukemia-free state, had an absolute neutrophil count (ANC) > 1 x 10^9/L, platelet count = 100 x 10^9/L, normal marrow differential with < 5% blasts, had been red blood cell (RBC) and platelet transfusion independent (defined as 1 week without RBC transfusion and 1 week without platelet transfusion), had no presence of Auer rods and no evidence of extramedullary leukemia, and blast counts in peripheral blood had been = 2%. Exact 95% confidence interval was estimated using binomial distribution.	Up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Percentage of Participants With CR With Incomplete Platelet Recovery (CRp)	CRp was defined according to modified Cheson criteria (2003), using centrally evaluated myeloblast counts from bone marrow aspirate/biopsy assessments and centrally evaluated hematology results; if neither central bone marrow aspirate nor biopsy was available, myeloblast was imputed with locally evaluated bone marrow aspirate/biopsy assessments (derived response). Participants were classified as being in CRp when they achieved CR except for incomplete platelet recovery (< 100 x 10^9/L). Exact 95% confidence interval was estimated using the binomial distribution.	Up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Percentage of Participants With CR With Incomplete Hematological Recovery (CRi)	CRi was defined according to modified Cheson criteria (2003), using centrally evaluated myeloblast counts from bone marrow aspirate/biopsy assessments and centrally evaluated hematology results; if neither central bone marrow aspirate nor biopsy was available, myeloblast was imputed with locally evaluated bone marrow aspirate/biopsy assessments (derived response). Participants were classified as being in CRi when they fulfilled all the criteria for CR except for incomplete hematological recovery with residual neutropenia < 1 x 10^9/L with or without complete platelet recovery. RBC and platelet transfusion independence were not required. Exact 95% confidence interval was estimated using the binomial distribution.	Up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Percentage of Participants With Complete Remission With Partial Hematologic Recovery (CRh)	CRh was defined according to modified Cheson criteria (2003), using centrally evaluated myeloblast counts from bone marrow aspirate/biopsy assessments and centrally evaluated hematology results; if neither central bone marrow aspirate nor biopsy was available, myeloblast was imputed with locally evaluated bone marrow aspirate/biopsy assessments (derived response). Participants were classified as being in CRh when they could not be classified as being in CR and had bone marrow blasts < 5% and partial hematologic recovery ANC >= 0.5 x 10^9/L and platelets >= 50 x 10^9/L. There should not be evidence of extramedullary leukemia. Exact 95% confidence interval was estimated using the binomial distribution. CRh was calculated only for participants who were FLT3 mutation positive.	Up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Percentage of Participants With Composite CR (CRc)	CRc was defined according to modified Cheson criteria (2003), using centrally evaluated myeloblast counts from bone marrow aspirate/biopsy assessments and centrally evaluated hematology results; if neither central bone marrow aspirate nor biopsy was available, myeloblast was imputed with locally evaluated bone marrow aspirate/biopsy assessments (derived response). Participants were classified as being in CRc when they had achieved either CR, complete remission with incomplete platelet recovery (CRp, defined as had achieved CR except for incomplete platelet recovery (< 100 x 10^9/L) or complete remission with incomplete hematologic recovery (CRi, defined as had fulfilled all the criteria for CR except for incomplete hematological recovery with residual neutropenia < 1 x 10^9/L with or without complete platelet recovery; RBC platelet transfusion independence not required). Exact 95% confidence interval was estimated using the binomial distribution.	Up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Percentage of Participants With Partial Remission (PR)	PR was defined according to modified Cheson criteria (2003), using centrally evaluated myeloblast counts from bone marrow aspirate/biopsy assessments and centrally evaluated hematology results; if neither central bone marrow aspirate nor biopsy was available, myeloblast was imputed with locally evaluated bone marrow aspirate/biopsy assessments (derived response). Participants were classified as being in PR when they had bone marrow regenerating normal hematopoietic cells with evidence of peripheral recovery with no (or only a few regenerating) circulating blasts and with a decrease of at least 50% in the percentage of blasts in the bone marrow aspirate with the total marrow blasts between 5% and 25%. A value of less or equal than 5% blasts was also considered a PR if Auer rods were present. There should be no evidence of extramedullary leukemia. Exact 95% confidence interval was estimated using the binomial distribution.	Up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Percentage of Participants With Best Response	Best response was defined according to modified Cheson criteria (2003), using centrally evaluated myeloblast counts from bone marrow aspirate/biopsy assessments and centrally evaluated hematology results; if neither central bone marrow aspirate nor biopsy was available, myeloblast was imputed with locally evaluated bone marrow aspirate/biopsy assessments (derived response). BR was defined as the best measured response for all visits (in the order of CR, CRp, CRi, and PR) post-treatment. Participants who achieved the best response of CR, CRp, CRi or PR were classified as responders. Participants who did not achieve at least PR were considered as non-responders. Exact 95% confidence interval was estimated using the binomial distribution.	Up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Percentage of Participants With Complete Remission and Complete Remission With Partial Hematologic Recovery (CR/CRh)	Participants with CR/CRh were defined as participants who achieved either CR or CRh. Participants with CR had bone marrow regenerating normal hematopoietic cells, achieved a morphologic leukemia-free state, had an ANC > 1 x 10^9/L, platelet count = 100 x 10^9/L, and normal marrow differential with < 5% blasts, had been RBC and platelet transfusion independent (defined as 1 week without RBC transfusion and 1 week without platelet transfusion). Also, there had been no presence of Auer rods, no evidence of extramedullary leukemia, and blast counts in peripheral blood had been = 2%. Participants with CRh could not be classified as being in CR and had bone marrow blasts < 5%, partial hematologic recovery ANC >= 0.5 x 10^9/L and platelets >= 50 x 10^9/L. There should not be evidence of extramedullary leukemia. Exact 95% confidence interval was estimated using the binomial distribution. CR/CRh was calculated only for participants who were FLT3 mutation positive.	Up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Duration of CR (DCR)	DCR was defined as the time from the date of first CR until the date of documented relapse for participants who achieved CR. Participants who died without report of relapse were considered non-events and censored at their last relapse-free disease assessment date. Other participants who did not relapse on study were considered non-events and censored at the last relapse-free disease assessment date. DCR was calculated using Kaplan-Meier method and therefore data are estimated.	From date of remission until end of study (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Duration of CRp (DCRp)	DCRp was defined as the time from the date of first CRp until the date of documented relapse for participants who achieved CRp. Participants who died without report of relapse were considered non-events and censored at their last relapse-free disease assessment date. Other participants who did not relapse on study were considered non-events and censored at the last relapse-free disease assessment date. DCRp was calculated using Kaplan-Meier method and therefore data are estimated.	From date of remission until end of study (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Duration of CRi (DCRi)	DCRi was defined as the time from the date of first CRi until the date of documented relapse for participants who achieved CRi. Participants who died without report of relapse and participants who did not relapse were considered non-events and censored at the last relapse-free disease assessment date. DCRi was calculated using Kaplan-Meier method and therefore data are estimated.	From date of remission until end of study (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Duration of CRh (DCRh)	DCRh was defined as the time from the date of first CRh until the date of documented relapse for participants who achieved CRh but did not have a best response of CR. Participants who died without report of relapse and participants who did not relapse were considered non-events and censored at the last relapse-free disease assessment date. DCRh was calculated using Kaplan-Meier method and therefore data are estimated. DCRh was calculated only for participants who were FLT3 mutation positive.	From date of remission until end of study (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Duration of CRc (DCRc)	DCRc was defined as the time from the date of first CRc until the date of documented relapse for participants who achieved CRc. Participants who died without report of relapse and participants who did not relapse were considered non-events and censored at the last relapse-free disease assessment date. DCRc was calculated using Kaplan-Meier method and therefore data are estimated.	From date of remission until end of study (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Duration of CR/CRh (DCRCRh)	DCRCRh was defined as the time from the date of first DCRCRh until the date of documented relapse for participants who achieved CR or CRh. For participants who achieved both CR and CRh, the first CR date or CRh date, whichever occurred first, was used. Participants who died without report of relapse and participants who did not relapse were considered non-events and censored at the last relapse-free disease assessment date. DCRCRh was calculated using Kaplan-Meier method and therefore data are estimated. DCRCRh was calculated only for participants who were FLT3 mutation positive.	From date of remission until end of study (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Duration of Response	Duration of response was defined as the time from the date of either first CRc or PR until the date of documented relapse of any type for participants who achieved CRc or PR. Participants who died without report of relapse were considered non-events and censored at their last relapse-free disease assessment date. Other participants who did not relapse on study are considered non-events and censored at the last relapse-free assessment date. Duration of response was calculated using Kaplan-Meier method and therefore data are estimated.	From date of remission until end of study (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Time to CR (TTCR)	TTCR was defined as the time from the first dose of study drug until the date of first CR.	From first dose of study drug up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Time to CRp (TTCRp)	TTCRp was defined as the time from the first dose of study drug until the date of first CRp. TTCRp was evaluated for participants who achieved CRp.	From first dose of study drug up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Time to CRi (TTCRi)	TTCRi was defined as the time from the first dose of study drug until the date of first CRi. TTCRi was evaluated for participants who achieved CRi.	From first dose of study drug up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Time to First CR/CRh (TTFCRCRh)	TTFCRCRh was defined as the time from the first dose of study drug until the date of first either CR or CRh. TTFCRCRh was evaluated for participants who achieved CR or CRh. For participants who achieve both CR and CRh, the first CR date or CRh date, whichever occurs first was used. TTFCRCRh was calculated only for participants who were FLT3 mutation positive.	From first dose of study drug up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Time to Best CR/CRh (TTBCRCRh)	TTBCRCRh was defined as the time from the first dose of study drug until the first date that the best response of CR or CRh was achieved. TTBCRCRh was evaluated for participants who achieved CR or CRh. For participants who achieve both CR and CRh, the first CR date was used. TTBCRCRh was calculated only for participants who were FLT3 mutation positive.	From first dose of study drug up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Time to CRc (TTCRc)	TTCRc was defined as the time from the first dose of study drug until the date of first CRc. TTCRc was evaluated for participants who achieved CRc.	From first dose of study drug up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Time to Response (TTR)	TTR was defined as the time from the first dose of study drug until the date of either first CRc or PR. TTR was evaluated for participants who achieved CRc or PR.	From first dose of study drug up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Time to Best Response (TTBR)	TTBR was defined as the time from the first dose of study drug until the first disease assessment date when participant achieved best response. TTBR was evaluated in participants who achieved best response of CR, CRp, CRi, or PR.	From first dose of study drug up to end of treatment (median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days)
Secondary	Overall Survival (OS)	The time from the date of first dose of study drug until the date of death from any cause. For a participant who was not known to have died by the end of study follow-up, OS was censored at the date of last contact. OS was calculated using Kaplan-Meier method and therefore data are estimated.	From first dose of study drug up to end of study (median time on study was 157.0 days, minimum of 5 days and maximum of 1320 days)
Secondary	Event Free Survival (EFS)	EFS was defined as the time from the date of first dose of study drug until the date of documented relapse, treatment failure or death from any cause, whichever occurred first. For a participant with none of these events, EFS was censored at the date of last relapse-free disease assessment. A participant without post-treatment disease assessment was censored at randomization date. Treatment failure included those participants who discontinued the treatment due to "progressive disease" or "lack of efficacy" without a previous response of CR, CRp, CRi or PR. Treatment failure date referred to the start of new anti-leukemia therapy or the last treatment evaluation date when new anti-leukemia therapy date was not available. For participants who were censored, last relapse-free disease assessment date referred to the participant's last disease assessment date. EFS was calculated using Kaplan-Meier method and therefore data are estimated.	From first dose of study drug up to end of study (median time on study was 157.0 days, minimum of 5 days and maximum of 1320 days)
Secondary	Leukemia Free Survival (LFS)	LFS was defined as the time from the date of first CRc until the date of documented relapse or death for participants who achieved CRc. For a participant who was not known to have relapsed or died, LFS was censored on the date of last relapse-free disease assessment date. LFS was calculated using Kaplan-Meier method and therefore data are estimated.	From first dose of study drug up to end of study (median time on study was 157.0 days, minimum of 5 days and maximum of 1320 days)
Secondary	Percentage of Participants Who Achieved Transfusion Conversion	Participants who achieved transfusion conversion were defined as the number of participants who were transfusion dependent at baseline period but became transfusion independent at post-baseline period divided by the total number of participants who were transfusion dependent at baseline period. Participants were considered baseline transfusion dependent if there were RBC or platelet transfusions within the baseline period. Participants were considered post-baseline transfusion independent if they were on treatment >=84 days, and if there was one consecutive 56 days without any RBC or platelet transfusion within post-baseline period. If participants were on treatment >28 days but <84 days, and there was no RBC or platelet transfusion within post-baseline period, or on treatment <=28 days, post-baseline transfusion status was not evaluable. Exact 95% confidence interval was estimated using the binomial distribution.	Baseline (28 days prior to first dose until 28 days after the first dose) and postbaseline (from 29 days after first dose date until last dose date); median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days
Secondary	Percentage of Participants Who Achieved Transfusion Maintenance	Participants who achieved transfusion maintenance were defined as the number of participants who were transfusion independent at baseline period and still maintained transfusion independent at post-baseline period divided by the total number of participants who were transfusion independent at baseline period.	Baseline (28 days prior to first dose until 28 days after the first dose) and postbaseline (from 29 days after first dose date until last dose date); median treatment duration was 69.5 days, minimum of 3 days and maximum of 1320 days
Secondary	AUC24 of Gilteritinib in Co-administration With Voriconazole	Plasma samples were used for pharmacokinetic assessments.	Cycle 1 Day 15 and Cycle 2 Day 1: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (gilteritinib)
Secondary	Cmax of Gilteritinib in Co-administration With Voriconazole	Plasma samples were used for pharmacokinetic assessments.	Cycle 1 Day 15 and Cycle 2 Day 1: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (gilteritinib)
Secondary	AUClast of Gilteritinib in Co-administration With Voriconazole	Plasma samples were used for pharmacokinetic assessments.	Cycle 1 Day 15 and Cycle 2 Day 1: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (gilteritinib)
Secondary	Tmax of Gilteritinib in Co-administration With Voriconazole	Plasma samples were used for pharmacokinetic assessments.	Cycle 1 Day 15 and Cycle 2 Day 1: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (gilteritinib)
Secondary	AUC24 of Midazolam Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (midazolam)
Secondary	AUC24 of Metabolite 1-Hydroxymidazolam After Administration of Midazolam With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (midazolam)
Secondary	Cmax of Midazolam Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (midazolam)
Secondary	Cmax of 1-Hydroxymidazolam After Administration of Midazolam With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (midazolam)
Secondary	AUClast of Midazolam Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (midazolam)
Secondary	AUClast of 1-Hydroxymidazolam After Administration of Midazolam With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (midazolam)
Secondary	Tmax of Midazolam Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (midazolam)
Secondary	Tmax of 1-Hydroxymidazolam After Administration of Midazolam With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 2, 4, 6, 24 hours postdose (midazolam)
Secondary	Area Under the Concentration-time Curve From the Time of Dosing Extrapolated to Time Infinity (AUCinf) of Cephalexin Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 1.5, 2, 3, 4, 6, 24 hours postdose (cephalexin)
Secondary	Cmax of Cephalexin Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 1.5, 2, 3, 4, 6, 24 hours postdose (cephalexin)
Secondary	AUClast of Cephalexin Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 1.5, 2, 3, 4, 6, 24 hours postdose (cephalexin)
Secondary	Tmax of Cephalexin Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 1.5, 2, 3, 4, 6, 24 hours postdose (cephalexin)
Secondary	T1/2 of Cephalexin Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 1.5, 2, 3, 4, 6, 24 hours postdose (cephalexin)
Secondary	Apparent Total Systemic Clearance After Single or Multiple Extravascular Dosing (CL/F) of Cephalexin Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 1.5, 2, 3, 4, 6, 24 hours postdose (cephalexin)
Secondary	Apparent Volume of Distribution During the Terminal Elimination Phase After Single Extravascular Dosing (Vz/F) of Cephalexin Administered With and Without Gilteritinib	Plasma samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: predose, 0.5, 1, 1.5, 2, 3, 4, 6, 24 hours postdose (cephalexin)
Secondary	Amount of Drug Excreted in Urine (Aelast) of Cephalexin Administered With and Without Gilteritinib	Urine samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: 0-3 hours, 3-6 hours, 6-24 hours postdose (cephalexin)
Secondary	Fraction of Drug Excreted Into Urine in Percentage (%Ae) of Cephalexin Administered With and Without Gilteritinib	Urine samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: 0-3 hours, 3-6 hours, 6-24 hours postdose (cephalexin)
Secondary	Renal Clearance (CLr) of Cephalexin in Administered With and Without Gilteritinib	Urine samples were used for pharmacokinetic assessments.	Day -1 and cycle 1 day 15: 0-3 hours, 3-6 hours, 6-24 hours postdose (cephalexin)

External Links

•   Link to results on the Astellas Clinical Study Results website