Dasatinib in Imatinib Resistant/Intolerant Chinese CML (Chronic and Advanced Phase) Subjects

Complete Hematologic Response (CHR) is obtained when all the following criteria are met: WBC ≤ institutional ULN; platelets ≤ 450,000/mm3; ≤20% basophils in peripheral blood; no blasts or promyelocytes in PB cells; < 5% myelocytes plus metamyelocytes in PB cells; no extra-medullary involvement including no hepatomegaly or splenomegaly.

Time to MCyR is defined as the time from the first dosing date until day criteria were first met for CCyR or PCyR, whichever occurred first.

Major Cytogenetic Response (MCyR) is defined as Complete Cytogenetic Response (CCyR: 0% Ph-chromosome-positive cells in metaphase in BM) or Partial Cytogenetic Response (PCyR: 1-35% Ph-chromosome-positive cells in metaphase in BM).

The duration of time from when the first day all criteria are met for CCyR or PCyR until the date of progression or death. Participants who neither progress nor die will be censored on the date of their last cytogenetic assessment. The duration of MCyR will be estimated via the Kaplan-Meier product-limit method.

Major Cytogenetic Response (MCyR) = Complete Cytogenetic Response (CCyR: 0% Ph-chromosome-positive cells in metaphase in BM) or Partial Cytogenetic Response (PCyR: 1-35% Ph-chromosome-positive cells in metaphase in BM).

Progression-free survival is defined as the time from first dosing date until the time progressive disease (PD) is first documented. Participants who die without a reported prior progression will be considered to have progressed on the date of their death. Participants who do not progress nor die will be censored on the date of their last hematologic or cytogenetic assessment, whichever comes last. PFS will be analyzed via the Kaplan-Meier product-limit method.

Participants were considered as having PD if they: achieved a hematologic response but subsequently no longer meet the criteria consistently on all assessment over a consecutive 2-week period after starting maximum dose; had no decrease from their baseline percent blasts in PB or BM on all assessments over a 4-week period, or had an increase by at least 50% in PB blast count (absolute) over a 2-week period after starting their maximum (individually-tolerated) dose.

The time from first dose of Dasatinib until the first day CHR or MaHR criteria are met (for all confirmed responses). Time to CHR is computed only for participants whose best response is CHR. Major HR (MaHR) includes CHR or no evidence of leukemia (NEL).

Major hematologic response: (MaHR) = complete hematologic response (CHR) + no evidence of leukemia (NEL).

CHR=white blood cells (WBC) ≤upper limit of normal (ULN); absolute neutrophil count (ANC) ≥1,000/mm3; platelets ≥100,000/mm3; no blasts/promyelocytes, <20% basophils \& <5% myelocytes+metamyelocytes in peripheral blood (PB); BM blasts ≤5%; no extra-medullary involvement/hepatomegaly/splenomegaly.

NEL=CHR except platelets ≥20,000/mm3 \& <100,000/mm3; ANC >500/mm3 \& <1,000/mm3.

Time from the first day all criteria are met for CHR until the date treatment is discontinued due to progressive disease (PD) or death. Participants who neither progress nor die will be censored on the date of their last assessment.

CHR=white blood cells (WBC) ≤ upper limit of normal (ULN); absolute neutrophil count (ANC) ≥1,000/mm3; platelets ≥100,000/mm3; no blasts/promyelocytes, <20% basophils and <5% myelocytes+metamyelocytes in peripheral blood (PB); BM blasts ≤5%; no extra-medullary involvement/hepatomegaly/splenomegaly.

PD = Hematologic response achieved but subsequently no longer meet the criteria consistently on all assessment over a 2-week period;, and no decrease from their baseline percent blasts in PB or BM on all assessments over a 4-week period or have an increase by at least 50% in PB blast count (absolute) over a 2-week period.

Time from the first day all criteria are met for CHR or NEL or MaHR until the date of progression or death. Participants who neither progress nor die will be censored on the date of their last assessment.

MAHR = CHR or no evidence of leukemia (NEL). CHR=white blood cells (WBC) ≤ upper limit of normal (ULN); absolute neutrophil count (ANC) ≥1,000/mm3; platelets ≥100,000/mm3; no blasts/promyelocytes, <20% basophils and <5% myelocytes+metamyelocytes in peripheral blood (PB); BM blasts ≤5%; no extra-medullary involvement/hepatomegaly/splenomegaly.

NEL=CHR except platelets ≥20,000/mm3 and <100,000/mm3; ANC >500/mm3 and <1,000/mm3.

Progressive disease (PD) = Hematologic response achieved but subsequently no longer meet the criteria consistently on all assessment over a 2-week period;, and no decrease from their baseline percent blasts in PB or BM on all assessments over a 4-week period or have an increase by at least 50% in PB blast count (absolute) over a 2-week period.

Progression-free survival is defined as the time from first dosing date until the time progressive disease (PD) is first documented. Participants who die without a reported prior progression will be considered to have progressed on the date of their death. Participants who do not progress nor die will be censored on the date of their last hematologic or cytogenetic assessment whichever comes last. PFS will be analyzed via the Kaplan-Meier product-limit method.

Progressive disease (PD) = Hematologic response achieved but subsequently no longer meet the criteria consistently on all assessment over a 2-week period;, and no decrease from their baseline percent blasts in PB or BM on all assessments over a 4-week period or have an increase by at least 50% in PB blast count (absolute) over a 2-week period.

AEs and SAEs considered possibly, probably, or certainly related to study treatment, graded according to Common Terminology Criteria for Adverse Events (CTCAE) Version 3.0 (Grade 1=Mild, Grade 2=Moderate, Grade 3=Severe, Grade 4=Life-threatening or disabling, Grade 5=Death).SAE= any untoward medical occurrence that at any dose results in death, is life-threatening, requires inpatient hospitalization/prolongation of existing hospitalization, results in persistent/significant disability/incapacity, is a congenital anomaly/birth defect, or is an important medical event.

Mean dasatinib plasma concentrations following 70 mg BID dose in AD CML or Ph+ ALL participants and following 100 mg QD dose in CP CML participants

Cmax=maximum observed plasma concentration of dasatinib

Tmax=time of maximum observed plasma concentration. T-Half=plasma half-life.

Area under the plasma concentration-time curve from time zero to the time of the last quantifiable concentration AUC(0-T)for dasatinib. AUC(INF)=area under the plasma concentration-time curve from time zero extrapolated to infinite time. AUC(TAU)=area under the plasma concentration-time curve for a dosing interval