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A Phase II Study of Dasatinib in Children and Adolescents With Newly Diagnosed Chronic Phase Chronic Myelogenous Leukemia (CML) or With Ph+ Leukemias Resistant or Intolerant to Imatinib

A Phase II Study of Dasatinib Therapy in Children and Adolescents With Newly Diagnosed Chronic Phase Chronic Myelogenous Leukemia or With Ph+ Leukemias Resistant or Intolerant to Imatinib

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00777036
Enrollment
133
Registered
2008-10-22
Start date
2009-03-20
Completion date
2025-01-27
Last updated
2025-08-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Leukemia

Keywords

Leukemia, Pediatric

Brief summary

The purpose of this study is to determine whether dasatinib is safe and effective in children and adolescents with newly diagnosed chronic myeloid leukemia (CML), or in children with Ph+ acute lymphoblastic leukemia (ALL), accelerated or blast phases CML who relapse after imatinib or who are resistant or intolerant to imatinib. The side effects of this oral investigational drug in children and adolescents will be evaluated

Interventions

DRUGDasatinib

Sponsors

Bristol-Myers Squibb
Lead SponsorINDUSTRY

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
1 Days to 18 Years
Healthy volunteers
No

Inclusion criteria

For more information regarding BMS clinical trial participation, please visit www.BMSStudyConnect.com. Inclusion Criteria: * CP-CML who prove resistant or intolerant to imatinib (Cohort 1) * Ph+ ALL, AP-CML, or BP-CML who are resistant or intolerant to or who relapse after imatinib therapy (Cohort 2) * Newly diagnosed, treatment naive CP-CML (Cohort 3) * Lansky or Karnofsky scale \>50 * Life expectancy ≥12 weeks * Adequate hepatic and renal function * Written informed consent * Target Population for the PK substudy must obtain written informed consent from subject, or from parents or legal guardians for minor subjects, according to local law and regulation * Target Population for the PK substudy subjects must have CP-CML and be taking daily dasatinib (tablets or PFOS) either as part of Cohort 1 or Cohort 3 of this protocol. Patients receiving commercial dasatinib tablets outside of this protocol may be invited to participate in this PK substudy * Target Population for the PK substudy subjects with CP-CML who are tolerating dasatinib tablet dose of at least 60 mg/m2 or dasatinib PFOS dose of at least 72 mg/m2 * Target Population for the PK substudy prior exposure to imatinib or other TKI therapy is permissible * Target Population for the PK substudy subjects must meet relevant inclusion criteria

Exclusion criteria

* Eligibility for potentially-curative therapy including hematopoietic stem-cell transplantation * Symptomatic CNS involvement (other than signs and symptoms caused by leptomeningeal disease) * Isolated extramedullary disease * Prior therapy with Dasatinib * Target Population for the PK substudy subjects participating in the PK substudy must comply with the relevant

Design outcomes

Primary

MeasureTime frameDescription
Major Cytogenetic Response (MCyR) RateFrom first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)Major Cytogenetic Response (MCyR) rate is defined as the proportion of all treated participants who achieved a complete (0%) or partial (1%-35% Ph+ metaphases in at least 20 metaphases in bone marrow) cytogenetic response, expressed as percentage. The denominator of the MCyR response rate consists of all treated participants in Cohort 1, and the numerator is all participants in Cohort 1 achieving MCyR. 95% confidence interval was calculated by Clopper-Pearson exact method.
Complete Hematologic Response (CHR) RateFrom first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)Complete Hematologic Response (CHR) rate is defined as the proportion of all treated participants who achieve a confirmed CHR while on-study, expressed as percentage. CHR is defined as including no more than 5% blasts in bone marrow and normal white blood cell count without blasts in peripheral blood, expressed as percentage. The denominator of the CHR response rate consists of all treated participants in Cohort 2, and the numerator is all participants in Cohort 2 achieving CHR. 95% confidence interval was calculated by Clopper-Pearson exact method.
Complete Cytogenetic Response (CCyR) RateFrom first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)Complete Cytogenetic Response (CCyR) rate is defined as the proportion of all treated participants who achieve a CCyR while on-study, expressed as a percentage. CCyR rate is defined as 0% Ph+ metaphases in at least 20 metaphases in bone marrow. The denominator of the CCyR response rate consists of all treated participants in Cohort 3, and the numerator is all participants in Cohort 3 achieving CCyR. 95% confidence interval was calculated by Clopper-Pearson exact method.

Secondary

MeasureTime frameDescription
Time to Major Cytogenetic Response (MCyR)From first dose until MCyR criteria are met (assessed up to September 2016, approximately 90 months)Time to MCyR is defined as the time from first dose of dasatinib until the first day MCyR criteria are met, computed only for participants whose best response is MCyR. (Based on \>=20 Metaphases)
Duration of Major Cytogenetic Response (MCyR)From first day criteria are met for MCyR until the date PD is reported or death (assessed up to September 2016, approximately 90 months)Duration of MCyR will be computed from the first day criteria are met for MCyR until the date progressive disease (PD) is reported (or treatment is discontinued for PD) or death. Participants who neither discontinue due to PD nor die will be censored on the date of their last hematologic or cytogenetic assessment, whichever comes last. (Based on \>=20 Metaphases)
Time to Complete Cytogenetic Response (CCyR)From first dose until CCyR criteria are met, assessed up to September 2016 (approximately 90 months)Time to CCyR is defined as the time from first dose of dasatinib until the first day CCyR criteria are met, computed only for participants whose best response is CCyR. (Based on \>=20 Metaphases)
Duration of Complete Cytogenetic Response (CCyR)From first day criteria are met for CCyR until the date of progressive disease or death (assessed up to September 2016, approximately 90 months)Duration of CCyR will be computed from the first day criteria are met for CCyR until the date progressive disease (PD) is reported (or treatment is discontinued for PD) or death. Participants who neither discontinue due to PD nor die will be censored on the date of their last hematologic or cytogenetic assessment, whichever comes last. (Based on \>=20 Metaphases)
Progression-Free Survival (PFS)174 MonthsPFS is defined as time from the first dosing date until the time PD is first documented by the investigator or death. Participants who die without a reported date of progression will be considered to have progressed on the date of death. Participants who neither progress nor die will be censored on the date of their last cytogenetic or hematologic assessment. Based on Kaplan-Meier methodology. Disease Progression was defined as any of the following criteria: -For CP-CML, progression to AP-CML or BP-CML while at highest tolerated dose -Increasing WBC -Loss of CHR (defined as any of the following: WBC count rises to \>20.0x10\^9/L; Platelet count rises to \>600x10\^9/L; appearance of extramedullary disease; appearance of \>5% myelocytes+metamyelocytes in blood; appearance of blasts/promyelocytes in peripheral blood) -Loss of MCyR or increase in Ph+ bone marrow cells by \>=30% from nadir -Death from any case during treatment.
Time to Complete Hematologic Response (CHR)From first dose until CHR criteria are met, assessed up to September 2016 (approximately 90 months)Time to CHR is defined as the time from first dose of dasatinib until the first day CHR criteria are met, provided they are confirmed 4 weeks later, computed only for participants whose best response is CHR.
Duration of Complete Hemotologic Response (CHR)From first day criteria are met for CHR until date of disease progression or death (assessed up to September 2016, approximately 90 months)Duration of CHR will be computed from the first day all criteria are met for CHR, provided they are confirmed 4 weeks later, until the date progressive disease (PD) is reported (or treatment is discontinued for PD) or death. Participants who neither discontinue due to PD nor die will be censored on the date of their last hematologic assessment.
Major Cytogenetic Response (MCyR) Rate in Cohort 2From first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)Major Cytogenetic Response (MCyR) rate was defined as the proportion of all treated participants who achieved a complete (0%) or partial (1%-35% Ph+ metaphases in at least 20 metaphases in bone marrow) cytogenetic response. The percentage of treated participants in each arm with MCyR is reported.
Overall Survival (OS)174 MonthsOS is defined as time from the first dosing date until the time of death. All participants will be followed yearly for survival for up to 5 years after treatment discontinuation. Participants who have not died or who are lost to follow-up will be censored on the last date the participant is known to be alive. Based on Kaplan-Meier methodology using graphs.
Major Molecular Response (MMR) RateFrom date of first treatment to date of MMR (assessed up to Jan 2025, approximately 15 years and 10 months)Molecular response was assessed using BCR-ABL transcript levels measurement by real-time quantitative polymerase chain reaction (qPCR). MMR for participants with the p210 BCR-ABL transcript variant was defined as a ratio BCR-ABL/ABL \<= 10-3 or 0.1% on the international scale. In this study, ABL was used as the control-gene. For a participant with the p190 BCR-ABL transcript variant (occurring in Cohort 2 only), on-study assessments were compared to the participant's individual baseline BCR-ABL/ABL ratio and a reduction to \< 0.1% or a 3-log reduction from baseline was considered an MMR.
Complete Molecular Response (CMR) RateFrom date of first treatment to date of CMR (assessed up to Jan 2025, approximately 15 years and 10 months)Molecular response was assessed using BCR-ABL transcript levels measurement by real-time quantitative polymerase chain reaction (qPCR). (CMR) is defined as absence of BCR-ABL rearrangements by real-time qPCR analysis. The percentage of treated participants with CMR is reported by arm.
Major Cytogenetic Response (MCyR) Rate up to 2 Years24 monthsMajor Cytogenetic Response (MCyR) rate is defined as the proportion of all treated participants who achieved a complete (0%) or partial (1%-35% Ph+ metaphases in at least 20 metaphases in bone marrow) cytogenetic response. The percentage of treated participants with MCyR is reported by arm.
Complete Cytogenetic Response (CCyR) Rate up to 2 Years24 monthsComplete Cytogenetic Response (CCyR) rate is defined as the proportion of all treated participants who achieve a CCyR while on-study. CCyR rate is defined as 0% Ph+ metaphases in at least 20 metaphases in bone marrow. The percentage of treated participants with CCyR is reported by arm.
Major Molecular Response (MMR) Rate up to 7.5 Years90 monthsMolecular response will be assessed using BCR-ABL transcript levels measurement by real-time qPCR. MMR for participants with the p210 BCR-ABL transcript variant is defined according to the recommendations of Hughes et al. as a ratio BCR-ABL/ABL \<= 10-3 or 0.1% on the international scale proposed by the authors. The standardized baseline, as established in the IRIS trial, is taken to represent 100% on the international scale and a 3-log reduction in ratio (BCR-ABL transcripts/ABL or BCR) from the standardized baseline (MMR) is fixed at 0.1%. In this study, ABL or other housekeeping gene, will be used as the control-gene. For a participant with the p190 BCR-ABL transcript variant, on-study assessments will be compared to the participant's individual baseline BCR-ABL/ABL ratio and a reduction to \< 0.1% or a 3-log reduction from baseline will be considered an MMR. The percentage of treated participants with MMR is reported by arm.
Complete Molecular Response (CMR) Rate up to 7.5 Years90 monthsMolecular response will be assessed using BCR-ABL transcript levels measurement by real-time quantitative polymerase chain reaction (qPCR). (CMR) is defined as absence of BCR-ABL rearrangements by real-time qPCR analysis. The percentage of treated participants with CMR is reported by arm.
Disease-Free Survival168 MonthsDisease free survival is defined as time from CCyR for participants with newly diagnosed chronic phase CML and for participants with chronic phase CML who are resistant or intolerant to imatinib (cohort 3 and cohort 1), and as time from CHR for participants with advanced phase CML and PH + ALL (cohort 2) until the time progression is first documented by the investigator or death from any cause. Based on Kaplan-Meier methodology. (CML: Chronic Myeloid Leukemia).
Complete Hematologic Response (CHR) Rate in Cohorts 1 and 3From first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)Complete Hematologic Response (CHR) rate defined as the proportion of all treated participants who achieve a confirmed CHR while on-study. CHR is defined as including no more than 5% blasts in bone marrow and normal white blood cell count without blasts in peripheral blood. The percentage of treated participants in each arm with CHR is reported.
Rate of Best Cytogenetic ResponseFrom first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)The number of participants achieving their best on-study cytogenetic response was reported as a percentage of all treated participants in that arm. (Based on \>=20 Metaphases)

Countries

Argentina, Australia, Brazil, Canada, France, Germany, India, Italy, Mexico, Netherlands, Romania, Russia, Singapore, South Africa, South Korea, Spain, United Kingdom, United States

Participant flow

Recruitment details

Participants were enrolled at 80 sites (Argentina, Australia, Brazil, Canada, France, Germany, Great Britain, India, Italy, Korea, Mexico, Netherlands, Romania, Russia, Singapore, South Africa, Spain, and USA).

Pre-assignment details

The PK sub-study analysis is not part of the pre-specified primary and secondary outcome measures.

Participants by arm

ArmCount
Cohort 1
Children and adolescents with CP-CML who were resistant or intolerant to imatinib received dasatinib tablets at 60 mg/m2 QD on a continuous oral regimen.
29
Cohort 2
Children and adolescents with Ph+ ALL, AP-CML or BP-CML who were resistant or intolerant to, or relapsed after imatinib therapy received dasatinib tablets at a dose schedule of 80 mg/m2 QD on a continuous oral regimen.
17
Cohort 3
Children and adolescents with CP-CML who were treatment-naive received dasatinib tablets at 60 mg/m2 QD or powder for oral suspension (PFOS) at 72 mg/m2 QD on a continuous oral regimen.
84
PK Sub-Study
Children and adolescents received powder for oral suspension (PFOS) at a dose of 90 mg/m2 QD to evaluate the pharmacokinetics of dasatinib.
3
Total133

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Follow-UpDeath1900
Follow-UpLost to Follow-up3000
Follow-UpMissing - Administrative Reasons in Russia1040
Follow-UpReason Not Specified40130
Follow-UpWithdrawal by Subject0050
On TreatmentAdministrative Reason By Sponsor1090
On TreatmentDeath0200
On TreatmentFailure to Meet Study Criteria0140
On TreatmentMaximum Clinical Benefit2050
On TreatmentNon-compliance with Study Drug1010
On TreatmentNot Reported0020
On TreatmentParticipant Request to Discontinue Study Treatment4060
On TreatmentPregnancy1010
On TreatmentProgressive Disease6470
On TreatmentReached 18 years of age and transitioned to commercial drug137420
On TreatmentSite Closed0110
On TreatmentStudy Drug Toxicity1040
On TreatmentWithdrawal by Subject0220

Baseline characteristics

CharacteristicCohort 1Cohort 2Cohort 3PK Sub-StudyTotal
Age, Continuous12.60 years
STANDARD_DEVIATION 4.774
12.10 years
STANDARD_DEVIATION 3.68
11.95 years
STANDARD_DEVIATION 4.418
13.33 years
STANDARD_DEVIATION 1.154
12.05 years
STANDARD_DEVIATION 4.255
Age, Customized
>= 12 to < 18 years
17 participants9 participants44 participants3 participants73 participants
Age, Customized
>= 18 years
2 participants0 participants0 participants0 participants2 participants
Age, Customized
>= 2 to < 7 years
3 participants2 participants10 participants0 participants15 participants
Age, Customized
< 2 years
1 participants0 participants2 participants0 participants3 participants
Age, Customized
>= 7 to < 12 years
6 participants6 participants28 participants0 participants40 participants
Ethnicity (NIH/OMB)
Hispanic or Latino
2 Participants0 Participants5 Participants0 Participants7 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
4 Participants0 Participants20 Participants1 Participants25 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
23 Participants17 Participants59 Participants2 Participants101 Participants
Race/Ethnicity, Customized
American Indian or Alaska Native
0 Participants0 Participants1 Participants0 Participants1 Participants
Race/Ethnicity, Customized
Asian
6 Participants3 Participants23 Participants0 Participants32 Participants
Race/Ethnicity, Customized
Black or African American
2 Participants0 Participants4 Participants0 Participants6 Participants
Race/Ethnicity, Customized
Other
1 Participants1 Participants0 Participants1 Participants3 Participants
Race/Ethnicity, Customized
White
20 Participants13 Participants56 Participants2 Participants91 Participants
Sex: Female, Male
Female
16 Participants9 Participants39 Participants2 Participants66 Participants
Sex: Female, Male
Male
13 Participants8 Participants45 Participants1 Participants67 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
deaths
Total, all-cause mortality
1 / 294 / 87 / 90 / 510 / 330 / 7
other
Total, other adverse events
27 / 297 / 89 / 950 / 5133 / 330 / 7
serious
Total, serious adverse events
16 / 297 / 86 / 921 / 5112 / 330 / 7

Outcome results

Primary

Complete Cytogenetic Response (CCyR) Rate

Complete Cytogenetic Response (CCyR) rate is defined as the proportion of all treated participants who achieve a CCyR while on-study, expressed as a percentage. CCyR rate is defined as 0% Ph+ metaphases in at least 20 metaphases in bone marrow. The denominator of the CCyR response rate consists of all treated participants in Cohort 3, and the numerator is all participants in Cohort 3 achieving CCyR. 95% confidence interval was calculated by Clopper-Pearson exact method.

Time frame: From first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)

Population: Primary efficacy endpoint pre-specified only for participants treated in Cohort 3

ArmMeasureValue (NUMBER)
Cohort 1Complete Cytogenetic Response (CCyR) Rate94.0 percentage of participants
Primary

Complete Hematologic Response (CHR) Rate

Complete Hematologic Response (CHR) rate is defined as the proportion of all treated participants who achieve a confirmed CHR while on-study, expressed as percentage. CHR is defined as including no more than 5% blasts in bone marrow and normal white blood cell count without blasts in peripheral blood, expressed as percentage. The denominator of the CHR response rate consists of all treated participants in Cohort 2, and the numerator is all participants in Cohort 2 achieving CHR. 95% confidence interval was calculated by Clopper-Pearson exact method.

Time frame: From first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)

Population: Primary efficacy endpoint pre-specified only for participants treated in Cohort 2

ArmMeasureValue (NUMBER)
Cohort 1Complete Hematologic Response (CHR) Rate29.4 percentage of participants
Primary

Major Cytogenetic Response (MCyR) Rate

Major Cytogenetic Response (MCyR) rate is defined as the proportion of all treated participants who achieved a complete (0%) or partial (1%-35% Ph+ metaphases in at least 20 metaphases in bone marrow) cytogenetic response, expressed as percentage. The denominator of the MCyR response rate consists of all treated participants in Cohort 1, and the numerator is all participants in Cohort 1 achieving MCyR. 95% confidence interval was calculated by Clopper-Pearson exact method.

Time frame: From first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)

Population: Primary efficacy endpoint pre-specified only for participants treated in Cohort 1

ArmMeasureValue (NUMBER)
Cohort 1Major Cytogenetic Response (MCyR) Rate89.7 percentage of participants
Secondary

Complete Cytogenetic Response (CCyR) Rate up to 2 Years

Complete Cytogenetic Response (CCyR) rate is defined as the proportion of all treated participants who achieve a CCyR while on-study. CCyR rate is defined as 0% Ph+ metaphases in at least 20 metaphases in bone marrow. The percentage of treated participants with CCyR is reported by arm.

Time frame: 24 months

Population: All treated participants

ArmMeasureGroupValue (NUMBER)
Cohort 1Complete Cytogenetic Response (CCyR) Rate up to 2 Years24 months82.8 percentage of participants
Cohort 1Complete Cytogenetic Response (CCyR) Rate up to 2 Years12 months75.9 percentage of participants
Cohort 3Complete Cytogenetic Response (CCyR) Rate up to 2 Years24 months41.2 percentage of participants
Cohort 3Complete Cytogenetic Response (CCyR) Rate up to 2 Years12 months41.2 percentage of participants
Cohort 3Complete Cytogenetic Response (CCyR) Rate up to 2 Years24 months94.0 percentage of participants
Cohort 3Complete Cytogenetic Response (CCyR) Rate up to 2 Years12 months92.9 percentage of participants
Cohort 3aComplete Cytogenetic Response (CCyR) Rate up to 2 Years12 months96.1 percentage of participants
Cohort 3aComplete Cytogenetic Response (CCyR) Rate up to 2 Years24 months96.1 percentage of participants
Cohort 3bComplete Cytogenetic Response (CCyR) Rate up to 2 Years24 months90.9 percentage of participants
Cohort 3bComplete Cytogenetic Response (CCyR) Rate up to 2 Years12 months87.9 percentage of participants
Secondary

Complete Hematologic Response (CHR) Rate in Cohorts 1 and 3

Complete Hematologic Response (CHR) rate defined as the proportion of all treated participants who achieve a confirmed CHR while on-study. CHR is defined as including no more than 5% blasts in bone marrow and normal white blood cell count without blasts in peripheral blood. The percentage of treated participants in each arm with CHR is reported.

Time frame: From first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)

Population: Secondary efficacy endpoint pre-specified only for participants treated in Cohort 1 and Cohort 3

ArmMeasureValue (NUMBER)
Cohort 1Complete Hematologic Response (CHR) Rate in Cohorts 1 and 393.1 percentage of participants
Cohort 3Complete Hematologic Response (CHR) Rate in Cohorts 1 and 396.4 percentage of participants
Secondary

Complete Molecular Response (CMR) Rate

Molecular response was assessed using BCR-ABL transcript levels measurement by real-time quantitative polymerase chain reaction (qPCR). (CMR) is defined as absence of BCR-ABL rearrangements by real-time qPCR analysis. The percentage of treated participants with CMR is reported by arm.

Time frame: From date of first treatment to date of CMR (assessed up to Jan 2025, approximately 15 years and 10 months)

Population: All treated participants

ArmMeasureValue (NUMBER)
Cohort 1Complete Molecular Response (CMR) Rate27.6 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate11.8 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate42.9 percentage of participants
Cohort 3aComplete Molecular Response (CMR) Rate49.0 percentage of participants
Cohort 3bComplete Molecular Response (CMR) Rate33.3 percentage of participants
Secondary

Complete Molecular Response (CMR) Rate up to 7.5 Years

Molecular response will be assessed using BCR-ABL transcript levels measurement by real-time quantitative polymerase chain reaction (qPCR). (CMR) is defined as absence of BCR-ABL rearrangements by real-time qPCR analysis. The percentage of treated participants with CMR is reported by arm.

Time frame: 90 months

Population: All treated participants

ArmMeasureGroupValue (NUMBER)
Cohort 1Complete Molecular Response (CMR) Rate up to 7.5 Years12 months6.9 percentage of participants
Cohort 1Complete Molecular Response (CMR) Rate up to 7.5 Years24 months17.2 percentage of participants
Cohort 1Complete Molecular Response (CMR) Rate up to 7.5 Years36 months17.2 percentage of participants
Cohort 1Complete Molecular Response (CMR) Rate up to 7.5 Years48 months24.1 percentage of participants
Cohort 1Complete Molecular Response (CMR) Rate up to 7.5 Years60 months24.1 percentage of participants
Cohort 1Complete Molecular Response (CMR) Rate up to 7.5 Years72 months24.1 percentage of participants
Cohort 1Complete Molecular Response (CMR) Rate up to 7.5 Years84 months24.1 percentage of participants
Cohort 1Complete Molecular Response (CMR) Rate up to 7.5 Years90 months27.6 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years36 months11.8 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years72 months11.8 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years12 months5.9 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years48 months11.8 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years24 months5.9 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years90 months11.8 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years60 months11.8 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years84 months11.8 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years84 months42.9 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years90 months42.9 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years48 months34.5 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years72 months41.7 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years36 months28.6 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years24 months25.0 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years12 months8.3 percentage of participants
Cohort 3Complete Molecular Response (CMR) Rate up to 7.5 Years60 months40.5 percentage of participants
Cohort 3aComplete Molecular Response (CMR) Rate up to 7.5 Years24 months33.3 percentage of participants
Cohort 3aComplete Molecular Response (CMR) Rate up to 7.5 Years36 months33.3 percentage of participants
Cohort 3aComplete Molecular Response (CMR) Rate up to 7.5 Years48 months43.1 percentage of participants
Cohort 3aComplete Molecular Response (CMR) Rate up to 7.5 Years60 months47.1 percentage of participants
Cohort 3aComplete Molecular Response (CMR) Rate up to 7.5 Years72 months49.0 percentage of participants
Cohort 3aComplete Molecular Response (CMR) Rate up to 7.5 Years90 months49.0 percentage of participants
Cohort 3aComplete Molecular Response (CMR) Rate up to 7.5 Years12 months9.8 percentage of participants
Cohort 3aComplete Molecular Response (CMR) Rate up to 7.5 Years84 months49.0 percentage of participants
Cohort 3bComplete Molecular Response (CMR) Rate up to 7.5 Years48 months21.2 percentage of participants
Cohort 3bComplete Molecular Response (CMR) Rate up to 7.5 Years90 months33.3 percentage of participants
Cohort 3bComplete Molecular Response (CMR) Rate up to 7.5 Years36 months21.2 percentage of participants
Cohort 3bComplete Molecular Response (CMR) Rate up to 7.5 Years84 months33.3 percentage of participants
Cohort 3bComplete Molecular Response (CMR) Rate up to 7.5 Years12 months6.1 percentage of participants
Cohort 3bComplete Molecular Response (CMR) Rate up to 7.5 Years72 months30.3 percentage of participants
Cohort 3bComplete Molecular Response (CMR) Rate up to 7.5 Years24 months12.1 percentage of participants
Cohort 3bComplete Molecular Response (CMR) Rate up to 7.5 Years60 months30.3 percentage of participants
Secondary

Disease-Free Survival

Disease free survival is defined as time from CCyR for participants with newly diagnosed chronic phase CML and for participants with chronic phase CML who are resistant or intolerant to imatinib (cohort 3 and cohort 1), and as time from CHR for participants with advanced phase CML and PH + ALL (cohort 2) until the time progression is first documented by the investigator or death from any cause. Based on Kaplan-Meier methodology. (CML: Chronic Myeloid Leukemia).

Time frame: 168 Months

Population: All treated participants with response of CCyR or CHR

ArmMeasureValue (MEDIAN)
Cohort 1Disease-Free SurvivalNA Months
Cohort 3Disease-Free SurvivalNA Months
Cohort 3Disease-Free SurvivalNA Months
Cohort 3aDisease-Free SurvivalNA Months
Cohort 3bDisease-Free SurvivalNA Months
Secondary

Duration of Complete Cytogenetic Response (CCyR)

Duration of CCyR will be computed from the first day criteria are met for CCyR until the date progressive disease (PD) is reported (or treatment is discontinued for PD) or death. Participants who neither discontinue due to PD nor die will be censored on the date of their last hematologic or cytogenetic assessment, whichever comes last. (Based on \>=20 Metaphases)

Time frame: From first day criteria are met for CCyR until the date of progressive disease or death (assessed up to September 2016, approximately 90 months)

Population: All treated participants who achieved CCyR

ArmMeasureValue (MEDIAN)
Cohort 1Duration of Complete Cytogenetic Response (CCyR)NA months
Cohort 3Duration of Complete Cytogenetic Response (CCyR)NA months
Cohort 3Duration of Complete Cytogenetic Response (CCyR)NA months
Cohort 3aDuration of Complete Cytogenetic Response (CCyR)NA months
Cohort 3bDuration of Complete Cytogenetic Response (CCyR)NA months
Secondary

Duration of Complete Hemotologic Response (CHR)

Duration of CHR will be computed from the first day all criteria are met for CHR, provided they are confirmed 4 weeks later, until the date progressive disease (PD) is reported (or treatment is discontinued for PD) or death. Participants who neither discontinue due to PD nor die will be censored on the date of their last hematologic assessment.

Time frame: From first day criteria are met for CHR until date of disease progression or death (assessed up to September 2016, approximately 90 months)

Population: All treated participants with CCyR

ArmMeasureValue (MEDIAN)
Cohort 1Duration of Complete Hemotologic Response (CHR)NA months
Cohort 3Duration of Complete Hemotologic Response (CHR)NA months
Cohort 3Duration of Complete Hemotologic Response (CHR)NA months
Cohort 3aDuration of Complete Hemotologic Response (CHR)NA months
Cohort 3bDuration of Complete Hemotologic Response (CHR)NA months
Secondary

Duration of Major Cytogenetic Response (MCyR)

Duration of MCyR will be computed from the first day criteria are met for MCyR until the date progressive disease (PD) is reported (or treatment is discontinued for PD) or death. Participants who neither discontinue due to PD nor die will be censored on the date of their last hematologic or cytogenetic assessment, whichever comes last. (Based on \>=20 Metaphases)

Time frame: From first day criteria are met for MCyR until the date PD is reported or death (assessed up to September 2016, approximately 90 months)

Population: All treated participants with MCyR

ArmMeasureValue (MEDIAN)
Cohort 1Duration of Major Cytogenetic Response (MCyR)NA months
Cohort 3Duration of Major Cytogenetic Response (MCyR)11.2 months
Cohort 3Duration of Major Cytogenetic Response (MCyR)NA months
Cohort 3aDuration of Major Cytogenetic Response (MCyR)NA months
Cohort 3bDuration of Major Cytogenetic Response (MCyR)NA months
Secondary

Major Cytogenetic Response (MCyR) Rate in Cohort 2

Major Cytogenetic Response (MCyR) rate was defined as the proportion of all treated participants who achieved a complete (0%) or partial (1%-35% Ph+ metaphases in at least 20 metaphases in bone marrow) cytogenetic response. The percentage of treated participants in each arm with MCyR is reported.

Time frame: From first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)

Population: Secondary efficacy endpoint pre-specified only for participants treated in Cohort 2

ArmMeasureValue (NUMBER)
Cohort 1Major Cytogenetic Response (MCyR) Rate in Cohort 252.9 percentage of participants
Secondary

Major Cytogenetic Response (MCyR) Rate up to 2 Years

Major Cytogenetic Response (MCyR) rate is defined as the proportion of all treated participants who achieved a complete (0%) or partial (1%-35% Ph+ metaphases in at least 20 metaphases in bone marrow) cytogenetic response. The percentage of treated participants with MCyR is reported by arm.

Time frame: 24 months

Population: All treated participants

ArmMeasureGroupValue (NUMBER)
Cohort 1Major Cytogenetic Response (MCyR) Rate up to 2 Years12 months89.7 percentage of participants
Cohort 1Major Cytogenetic Response (MCyR) Rate up to 2 Years24 months89.7 percentage of participants
Cohort 3Major Cytogenetic Response (MCyR) Rate up to 2 Years12 months58.8 percentage of participants
Cohort 3Major Cytogenetic Response (MCyR) Rate up to 2 Years24 months58.8 percentage of participants
Cohort 3Major Cytogenetic Response (MCyR) Rate up to 2 Years12 months96.4 percentage of participants
Cohort 3Major Cytogenetic Response (MCyR) Rate up to 2 Years24 months96.4 percentage of participants
Cohort 3aMajor Cytogenetic Response (MCyR) Rate up to 2 Years24 months98.0 percentage of participants
Cohort 3aMajor Cytogenetic Response (MCyR) Rate up to 2 Years12 months98.0 percentage of participants
Cohort 3bMajor Cytogenetic Response (MCyR) Rate up to 2 Years12 months93.9 percentage of participants
Cohort 3bMajor Cytogenetic Response (MCyR) Rate up to 2 Years24 months93.9 percentage of participants
Secondary

Major Molecular Response (MMR) Rate

Molecular response was assessed using BCR-ABL transcript levels measurement by real-time quantitative polymerase chain reaction (qPCR). MMR for participants with the p210 BCR-ABL transcript variant was defined as a ratio BCR-ABL/ABL \<= 10-3 or 0.1% on the international scale. In this study, ABL was used as the control-gene. For a participant with the p190 BCR-ABL transcript variant (occurring in Cohort 2 only), on-study assessments were compared to the participant's individual baseline BCR-ABL/ABL ratio and a reduction to \< 0.1% or a 3-log reduction from baseline was considered an MMR.

Time frame: From date of first treatment to date of MMR (assessed up to Jan 2025, approximately 15 years and 10 months)

Population: All treated participants

ArmMeasureValue (NUMBER)
Cohort 1Major Molecular Response (MMR) Rate69.0 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate29.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate84.5 percentage of participants
Cohort 3aMajor Molecular Response (MMR) Rate90.2 percentage of participants
Cohort 3bMajor Molecular Response (MMR) Rate75.8 percentage of participants
Secondary

Major Molecular Response (MMR) Rate up to 7.5 Years

Molecular response will be assessed using BCR-ABL transcript levels measurement by real-time qPCR. MMR for participants with the p210 BCR-ABL transcript variant is defined according to the recommendations of Hughes et al. as a ratio BCR-ABL/ABL \<= 10-3 or 0.1% on the international scale proposed by the authors. The standardized baseline, as established in the IRIS trial, is taken to represent 100% on the international scale and a 3-log reduction in ratio (BCR-ABL transcripts/ABL or BCR) from the standardized baseline (MMR) is fixed at 0.1%. In this study, ABL or other housekeeping gene, will be used as the control-gene. For a participant with the p190 BCR-ABL transcript variant, on-study assessments will be compared to the participant's individual baseline BCR-ABL/ABL ratio and a reduction to \< 0.1% or a 3-log reduction from baseline will be considered an MMR. The percentage of treated participants with MMR is reported by arm.

Time frame: 90 months

Population: All treated participants

ArmMeasureGroupValue (NUMBER)
Cohort 1Major Molecular Response (MMR) Rate up to 7.5 Years12 months41.4 percentage of participants
Cohort 1Major Molecular Response (MMR) Rate up to 7.5 Years24 months55.2 percentage of participants
Cohort 1Major Molecular Response (MMR) Rate up to 7.5 Years36 months62.1 percentage of participants
Cohort 1Major Molecular Response (MMR) Rate up to 7.5 Years48 months62.1 percentage of participants
Cohort 1Major Molecular Response (MMR) Rate up to 7.5 Years60 months65.5 percentage of participants
Cohort 1Major Molecular Response (MMR) Rate up to 7.5 Years72 months65.5 percentage of participants
Cohort 1Major Molecular Response (MMR) Rate up to 7.5 Years84 months65.5 percentage of participants
Cohort 1Major Molecular Response (MMR) Rate up to 7.5 Years90 months69.0 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years36 months29.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years72 months29.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years12 months29.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years48 months29.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years24 months29.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years90 months29.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years60 months29.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years84 months29.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years84 months84.5 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years90 months84.5 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years48 months82.1 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years72 months84.5 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years36 months77.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years24 months70.2 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years12 months52.4 percentage of participants
Cohort 3Major Molecular Response (MMR) Rate up to 7.5 Years60 months83.3 percentage of participants
Cohort 3aMajor Molecular Response (MMR) Rate up to 7.5 Years24 months74.5 percentage of participants
Cohort 3aMajor Molecular Response (MMR) Rate up to 7.5 Years36 months82.4 percentage of participants
Cohort 3aMajor Molecular Response (MMR) Rate up to 7.5 Years48 months88.2 percentage of participants
Cohort 3aMajor Molecular Response (MMR) Rate up to 7.5 Years60 months90.2 percentage of participants
Cohort 3aMajor Molecular Response (MMR) Rate up to 7.5 Years72 months90.2 percentage of participants
Cohort 3aMajor Molecular Response (MMR) Rate up to 7.5 Years90 months90.2 percentage of participants
Cohort 3aMajor Molecular Response (MMR) Rate up to 7.5 Years12 months56.9 percentage of participants
Cohort 3aMajor Molecular Response (MMR) Rate up to 7.5 Years84 months90.2 percentage of participants
Cohort 3bMajor Molecular Response (MMR) Rate up to 7.5 Years48 months72.7 percentage of participants
Cohort 3bMajor Molecular Response (MMR) Rate up to 7.5 Years90 months75.8 percentage of participants
Cohort 3bMajor Molecular Response (MMR) Rate up to 7.5 Years36 months69.7 percentage of participants
Cohort 3bMajor Molecular Response (MMR) Rate up to 7.5 Years84 months75.8 percentage of participants
Cohort 3bMajor Molecular Response (MMR) Rate up to 7.5 Years12 months45.5 percentage of participants
Cohort 3bMajor Molecular Response (MMR) Rate up to 7.5 Years72 months75.8 percentage of participants
Cohort 3bMajor Molecular Response (MMR) Rate up to 7.5 Years24 months63.6 percentage of participants
Cohort 3bMajor Molecular Response (MMR) Rate up to 7.5 Years60 months72.7 percentage of participants
Secondary

Overall Survival (OS)

OS is defined as time from the first dosing date until the time of death. All participants will be followed yearly for survival for up to 5 years after treatment discontinuation. Participants who have not died or who are lost to follow-up will be censored on the last date the participant is known to be alive. Based on Kaplan-Meier methodology using graphs.

Time frame: 174 Months

Population: All treated participants

ArmMeasureValue (MEDIAN)
Cohort 1Overall Survival (OS)NA Months
Cohort 3Overall Survival (OS)13.63 Months
Cohort 3Overall Survival (OS)NA Months
Cohort 3aOverall Survival (OS)NA Months
Cohort 3bOverall Survival (OS)NA Months
Secondary

Progression-Free Survival (PFS)

PFS is defined as time from the first dosing date until the time PD is first documented by the investigator or death. Participants who die without a reported date of progression will be considered to have progressed on the date of death. Participants who neither progress nor die will be censored on the date of their last cytogenetic or hematologic assessment. Based on Kaplan-Meier methodology. Disease Progression was defined as any of the following criteria: -For CP-CML, progression to AP-CML or BP-CML while at highest tolerated dose -Increasing WBC -Loss of CHR (defined as any of the following: WBC count rises to \>20.0x10\^9/L; Platelet count rises to \>600x10\^9/L; appearance of extramedullary disease; appearance of \>5% myelocytes+metamyelocytes in blood; appearance of blasts/promyelocytes in peripheral blood) -Loss of MCyR or increase in Ph+ bone marrow cells by \>=30% from nadir -Death from any case during treatment.

Time frame: 174 Months

Population: All treated participants

ArmMeasureValue (MEDIAN)
Cohort 1Progression-Free Survival (PFS)NA Months
Cohort 3Progression-Free Survival (PFS)6.67 Months
Cohort 3Progression-Free Survival (PFS)NA Months
Cohort 3aProgression-Free Survival (PFS)NA Months
Cohort 3bProgression-Free Survival (PFS)NA Months
Secondary

Rate of Best Cytogenetic Response

The number of participants achieving their best on-study cytogenetic response was reported as a percentage of all treated participants in that arm. (Based on \>=20 Metaphases)

Time frame: From first dose of study therapy until 30 days after last dose (Assessed up to September 2016, approximately 90 months)

Population: All treated participants

ArmMeasureGroupValue (NUMBER)
Cohort 1Rate of Best Cytogenetic ResponseComplete (0%)82.8 percentage of participants
Cohort 1Rate of Best Cytogenetic ResponsePartial (>0% - 35%)6.9 percentage of participants
Cohort 1Rate of Best Cytogenetic ResponseMinor (>35% - 65%)3.4 percentage of participants
Cohort 1Rate of Best Cytogenetic ResponseMinimal (>65% - 95%)3.4 percentage of participants
Cohort 1Rate of Best Cytogenetic ResponseNo Response (>95% - 100%)0 percentage of participants
Cohort 1Rate of Best Cytogenetic ResponseUnable to Determine3.4 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseNo Response (>95% - 100%)5.9 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseUnable to Determine41.2 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseComplete (0%)29.4 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseMinor (>35% - 65%)0 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseMinimal (>65% - 95%)0 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponsePartial (>0% - 35%)23.5 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseMinimal (>65% - 95%)1.2 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseNo Response (>95% - 100%)0 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseComplete (0%)94.0 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseMinor (>35% - 65%)0 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponsePartial (>0% - 35%)2.4 percentage of participants
Cohort 3Rate of Best Cytogenetic ResponseUnable to Determine2.4 percentage of participants
Cohort 3aRate of Best Cytogenetic ResponseMinimal (>65% - 95%)2.0 percentage of participants
Cohort 3aRate of Best Cytogenetic ResponsePartial (>0% - 35%)2.0 percentage of participants
Cohort 3aRate of Best Cytogenetic ResponseMinor (>35% - 65%)0 percentage of participants
Cohort 3aRate of Best Cytogenetic ResponseUnable to Determine0 percentage of participants
Cohort 3aRate of Best Cytogenetic ResponseNo Response (>95% - 100%)0 percentage of participants
Cohort 3aRate of Best Cytogenetic ResponseComplete (0%)96.1 percentage of participants
Cohort 3bRate of Best Cytogenetic ResponseNo Response (>95% - 100%)0 percentage of participants
Cohort 3bRate of Best Cytogenetic ResponseMinor (>35% - 65%)0 percentage of participants
Cohort 3bRate of Best Cytogenetic ResponsePartial (>0% - 35%)3.0 percentage of participants
Cohort 3bRate of Best Cytogenetic ResponseUnable to Determine6.1 percentage of participants
Cohort 3bRate of Best Cytogenetic ResponseMinimal (>65% - 95%)0 percentage of participants
Cohort 3bRate of Best Cytogenetic ResponseComplete (0%)90.9 percentage of participants
Secondary

Time to Complete Cytogenetic Response (CCyR)

Time to CCyR is defined as the time from first dose of dasatinib until the first day CCyR criteria are met, computed only for participants whose best response is CCyR. (Based on \>=20 Metaphases)

Time frame: From first dose until CCyR criteria are met, assessed up to September 2016 (approximately 90 months)

Population: All treated participants with CCyR

ArmMeasureValue (MEDIAN)
Cohort 1Time to Complete Cytogenetic Response (CCyR)3.9 months
Cohort 3Time to Complete Cytogenetic Response (CCyR)1.6 months
Cohort 3Time to Complete Cytogenetic Response (CCyR)5.6 months
Cohort 3aTime to Complete Cytogenetic Response (CCyR)5.7 months
Cohort 3bTime to Complete Cytogenetic Response (CCyR)5.6 months
Secondary

Time to Complete Hematologic Response (CHR)

Time to CHR is defined as the time from first dose of dasatinib until the first day CHR criteria are met, provided they are confirmed 4 weeks later, computed only for participants whose best response is CHR.

Time frame: From first dose until CHR criteria are met, assessed up to September 2016 (approximately 90 months)

Population: All treated participants with CHR

ArmMeasureValue (MEDIAN)
Cohort 1Time to Complete Hematologic Response (CHR)0.7 months
Cohort 3Time to Complete Hematologic Response (CHR)2.5 months
Cohort 3Time to Complete Hematologic Response (CHR)1.2 months
Cohort 3aTime to Complete Hematologic Response (CHR)1.2 months
Cohort 3bTime to Complete Hematologic Response (CHR)1.0 months
Secondary

Time to Major Cytogenetic Response (MCyR)

Time to MCyR is defined as the time from first dose of dasatinib until the first day MCyR criteria are met, computed only for participants whose best response is MCyR. (Based on \>=20 Metaphases)

Time frame: From first dose until MCyR criteria are met (assessed up to September 2016, approximately 90 months)

Population: All treated participants with MCyR

ArmMeasureValue (MEDIAN)
Cohort 1Time to Major Cytogenetic Response (MCyR)3.1 months
Cohort 3Time to Major Cytogenetic Response (MCyR)1.6 months
Cohort 3Time to Major Cytogenetic Response (MCyR)3.0 months
Cohort 3aTime to Major Cytogenetic Response (MCyR)3.3 months
Cohort 3bTime to Major Cytogenetic Response (MCyR)3.0 months

Source: ClinicalTrials.gov · Data processed: Feb 26, 2026