Study of Dasatinib (BMS-354825) in Patients With Accelerated Phase Chronic Myeloid Leukemia

Bristol-Myers Squibb197 enrolled

Overview

The purpose of this clinical research study is to learn if BMS-354825 will have activity, defined by hematologic response, in subjects who have accelerated phase chronic myeloid leukemia (CML) who are resistant to or intolerant to imatinib mesylate. The safety of this treatment will also be studied.

Study Type

INTERVENTIONAL

Allocation

NON_RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

197

Conditions

Chronic Myelogenous Leukemia

Interventions

DasatinibDRUG

Tablets, Oral, 70 mg, twice daily, until disease progression or intolerable toxicity, switch to the roll-over study or study closure

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Subjects with Philadelphia chromosome positive (PH+) or the fused gene BCR/ABL positive (BCR/ABL+) accelerated phase chronic myeloid leukemia (CML) whose disease has primary or acquired hematologic resistance to imatinib mesylate or who are intolerant of imatinib mesylate. * Subjects must have had prior exposure to imatinib. However, imatinib mesylate does not need to be their most recent CML treatment prior to coming on this study. * Men and women, 18 years of age or older. * Adequate hepatic function. * Adequate renal function. * Women of childbearing potential (WOCBP) must be using an adequate method of contraception to avoid pregnancy throughout the study and for a period of least 1 month before and at least 3 months after the study in such a manner that the risk of pregnancy is minimized. Exclusion Criteria: * Women who are pregnant or breastfeeding. * Subjects who are eligible and willing to undergo transplantation during the screening period. * A serious uncontrolled medical disorder or active infection that would impair the ability of the subjects to receive protocol therapy. * Uncontrolled or significant cardiovascular disease. * Medications that increase bleeding risk. * Medications that change heart rhythms. * Dementia or altered mental status that would prohibit the understanding or rendering of informed consent. * History of significant bleeding disorder unrelated to CML. * Concurrent incurable malignancy other than CML. * Evidence of organ dysfunction or digestive dysfunction that would prevent administration of study therapy. * Prior therapy with dasatinib (BMS-354825). * Prisoners or subjects who are compulsorily detained (involuntarily incarcerated) for treatment of either a psychiatric or physical (e.g., infectious disease) illness must not be enrolled into this study.

Locations (70)

Outcomes

Primary Outcomes

Major and Overall Hematologic Response (MaHR and OHR)

MaHR=best confirmed response of complete hematologic response (CHR) or No Evidence of Leukemia (NEL). OHR=best confirmed response of MaHR or minor hematologic response (MiHR). Confirmed hematologic response=response confirmed ≥4 weeks after first documented event with no concomitant use of anagrelide or hydroxyurea. Maintaining a response=no 2 consecutive records of nonresponse at assessment. Criteria for CHR and NEL specified in Outcome Measure 2 and criteria for MiHR in Outcome Measure 4.

Time frame: Baseline (within 72 hours of therapy start); Cycle 1/Day 1; Weekly during treatment; at end of treatment

Secondary Outcomes

Percentage of Participants Who Achieved MaHR and Did Not Progress at 12 Months (Based on the Kaplan-Meier Estimate of the Duration of Response)

MaHR=best response of CHR or NEL. CHR=white blood cells ≤institutional upper limit of normal (iULN); absolute neutrophil count (ANC) ≥1000/mm3; platelets ≥100,000/mm3; no blasts/promyelocytes in peripheral blood (PB); bone marrow blasts ≤5%; \<5% myelocytes+metamyelocytes in PB; PB basophils ≤ iULN; no extramedullary involvement. NEL=WBC ≤iULN; no blasts/promyelocytes in PB; bone marrow blasts ≤5%; \<5% myelocytes+metamyelocytes in PB; PB basophils ≤iULN; no extramedullary involvement; at least 1 of: ANC ≥500/mm3 \& \<1000/mm3; platelets ≥20,000/mm3 \& \<100,000/mm3.

Time frame: 12 months

Percentage of Participants Who Achieved MaHR and Did Not Progress at 24 Months in the Imatinib-Resistant Group (Based on the Kaplan-Meier Estimate of the Duration of Response)

Percentage of participants in the Imatinib-Resistant Group who achieved MaHR and did not progress at Month 24, based on the Kaplan-Meier estimate of the duration of response. MaHR=best confirmed response of complete hematologic response (CHR) or No Evidence of Leukemia (NEL). Criteria for MaHR and NEL are specified in Outcome Measure 2.

Time frame: 24 months

Percentage of Participants Who Achieved OHR and Did Not Progress at 12 Months and 24 Months

Data from ClinicalTrials.gov

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Local Institution

Birmingham, Alabama, United States

Local Institution

Anaheim, California, United States

Local Institution

Los Angeles, California, United States

Local Institution

Stanford, California, United States

Local Institution

Vallejo, California, United States

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Jacksonville, Florida, United States

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Tampa, Florida, United States

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Atlanta, Georgia, United States

Local Institution

Chicago, Illinois, United States

Local Institution

Kansas City, Kansas, United States

...and 60 more locations

Percentage of participants who achieved OHR and did not progress at specified timepoints, based on the Kaplan-Meier estimate of the duration of response. OHR=best confirmed response of MaHR or MiHR. MaHR criteria in Outcome Measure 2. MiHR= \<15% blasts in bone marrow and \<15% blasts in peripheral blood (PB); \<30% blasts+promyelocytes in bone marrow and \<30% blasts+promyelocytes in PB; \<20% basophils in PB; no extramedullary disease other than spleen and liver. Confirmed hematologic response= confirmed ≥4 weeks after 1st documented event with no concomitant use of anagrelide or hydroxyurea.

Time frame: 12 months, 24 months

Median Time in Days From First Dosing Date to Date of MaHR

Time frame: Baseline (within 72 hours of therapy start); Cycle 1/Day 1; Weekly during treatment; at end of treatment

Time to OHR

Median time (in months) from first dosing date to date of OHR. OHR=best confirmed response of MaHR or MiHR. Criteria for MaHR specified in Outcome Measure 2. MiHR= \<15% blasts in bone marrow and \<15% blasts in peripheral blood (PB); \<30% blasts+promyelocytes in bone marrow and \<30% blasts+promyelocytes in PB; \<20% basophils in PB; no extramedullary disease other than spleen and liver. Confirmed hematologic response = response confirmed ≥4 weeks after 1st documented event with no concomitant use of anagrelide or hydroxyurea.

Time frame: Baseline (within 72 hours of therapy start); Cycle 1/Day 1; Weekly during treatment; at end of treatment

Best Cytogenetic Response

Number of participants with complete, partial, minor, minimal, or no cytogenetic response. Determination of cytogenetic response based on the prevalence (percentage) of Philadelphia chromosome positive (Ph+) metaphases among cells in metaphase in a bone marrow sample (aspirates/biopsies).

Time frame: Baseline (within 4 weeks of therapy start); Every month for Cycles 1-3; Every 12 weeks for Cycles 4+; end of treatment

Best Confirmed Hematologic Response

Number of participants with confirmed complete hematologic response (CHR) or No Evidence of Leukemia (NEL), minor hematologic response (MiHR), or no hematologic response. Confirmed hematologic response=response that is confirmed after at least 4 weeks with no concomitant use of anagrelide or hydroxyurea use during this interval. Criteria for CHR and NEL are specified in Outcome Measure 2; criteria for MiHR are specified in Outcome Measure 4.

Time frame: Baseline (within 72 hours of therapy start); Cycle 1/Day 1; Weekly during treatment; at end of treatment

Number of Participants Who Achieved a Major Molecular Response (MMR) During Treatment Period

Number of participants who achieved an MMR at any time during the treatment period. MMR was calculated by measuring BCR-ABL transcripts in blood during treatment using quantitative reverse transcription-polymerase chain reaction (RT-PCR). BCR-ABL=the fused gene found in subjects with this type of Chronic Myeloid Leukemia (CML).

Time frame: Baseline, every 12 weeks throughout study (treatment continued until discontinuation due to toxicity, disease progression, or other protocol-specified criteria).

MaHR and MCyR Among Participants With Baseline BCR-ABL Point Mutations

Major hematologic and cytogenetic responses (MaHR and MCyR) to dasatinib in subjects with mutations at baseline, including imatinib-resistant mutations (IRM) and specific BCR-ABL mutations (SBAM). BCR-ABL=the fused gene found in subjects with this type of CML. Criteria for MaHR are specified in Outcome Measure 2. MCyR=combined complete cytogenetic and partial cytogenetic response rate. Complete Cytogenetic Response= 0% Ph+ Cells in Metaphase in Bone Marrow, Partial Cytogenetic Response \> 0% to 35% Ph+ Cells in Metaphase in Bone Marrow.

Time frame: Baseline, at time of disease progression. (treatment continued until discontinuation due to toxicity, disease progression, or other protocol-specified criteria).

Minimal Clinically Significant Change From Baseline in Functional Assessment of Cancer Therapy-General (FACT-G)

Number of subjects with minimally significant changes from baseline in the health-related quality of life questionnaire FACT-G. FACT-G=27 questions in 4 domains: physical, social/family, emotional, and functional well-being (PWB, SWB, EWB, FWB). Total score=0 to 108; higher score=better health-related quality of life. Total Score change of 7 or more=minimal clinical important change; PWB, EWB, and FWB score change of 3 or more, and SWB score change of 2 or more=minimal clinically important change.

Time frame: Baseline, every 2 weeks for the first 3 cycles, following every 4-week cycle, and once at follow-up.(treatment continued until discontinuation due to toxicity, disease progression, or other protocol-specified criteria).

Adverse Events (AEs), Serious Adverse Events (SAEs), Deaths, Hematologic Toxicities, and Toxicities Leading to Discontinuation

AE=any new untoward medical occurrence or worsening of a pre-existing medical condition regardless of causal relationship with treatment. SAE=any untoward medical occurrence at any dose that: results in death; is life-threatening; requires or prolongs inpatient hospitalization; results in persistent or significant disability; is cancer; is congenital anomaly/birth defect; results in drug dependency/abuse; is an important medical event. Graded by National Cancer Institute Common Terminology Criteria for Adverse Events v3.0. (1=Mild, 2=Moderate, 3=Severe, 4=Life-threatening/disabling, 5=Death)

Time frame: Continuous from pretreatment through each 4-week cycle and at follow-up. (treatment continued until discontinuation due to toxicity, disease progression, or other protocol-specified criteria).

Pharmacokinetics (PK) of Dasatinib and Its Metabolite BMS-582691 - Maximum Observed Plasma Concentration (Cmax)

The Cmax was obtained from experimental observations. Using no weighting factor, the terminal log-linear phase of the concentration-time curve was identified by least-square linear regression of at least 3 data points that yielded a maximum G-criteria,which is also referred to as adjusted R-squared.

Time frame: Collected on Days 1 and 8 at times as close as possible to the following time points (relative to drug administration): pre-dose, and following drug administration at 30 minutes, 1 hour, 1.5, 2, 3, 4, 5, 6, 8 and 10 hours.

Pharmacokinetics (PK) of Dasatinib and Its Metabolite BMS-582691 - Area Under the Plasma Concentration-time Curve From Time Zero to the Last Quantifiable Time Point Within the Dosing Interval of 12 Hours (AUC[0-T])

The AUC(0-T) was calculated using the mixed log-linear trapezoidal algorithm in Kinetica™. In the calculation of AUC(0-T), predose concentrations that were less than the lower limit of quantitation (LLQ) were assigned a value of zero.

Pharmacokinetics (PK) of Dasatinib and Its Metabolite BMS-582691 - Time to Maximum Observed Plasma Concentration (Tmax)

The Tmax was obtained from experimental observations. Using no weighting factor, the terminal log-linear phase of the concentration-time curve was identified by least-square linear regression of at least 3 data points that yielded a maximum G-criteria,which is also referred to as adjusted R-squared.

Pharmacokinetics (PK) of Dasatinib and Its Metabolite BMS-582691 - Plasma Half-life (T-HALF)

The T-HALF was calculated as Ln2/Lz,where Lz was the absolute value of the slope of the terminal log-linear phase.

Population PK of Dasatinib

Population pharmacokinetic analysis was not done because it is not meaningful for this single study

Time frame: Day 8 immediately prior to the first daily dose and between 30 minutes to 3 hours following this dose.