Treatment Optimization for Patients With Chronic Myeloid Leukemia (CML) With Treatment naïve Disease (1st Line) and Patients With Resistance or Intolerance Against Alternative Abl-Kinase Inhibitors (≥2nd Line)
Overview
- Phase
- Phase 3
- Intervention
- dasatinib (SPRYCEL®)
- Conditions
- Myeloid Leukemia, Chronic
- Sponsor
- University of Jena
- Enrollment
- 291
- Locations
- 53
- Primary Endpoint
- Rate of molecular Response
- Status
- Completed
- Last Updated
- 2 years ago
Overview
Brief Summary
Treatment optimization for patients with chronic myeloid leukemia (CML) with treatment naïve disease (1st line) and patients with resistance or intolerance against alternative Abl-Kinase Inhibitors (≥2nd line) (DasaHIT Trial (Dasatinib Holiday for Improved Tolerability))
Detailed Description
Dasatinib is indicated in Europe for: * Treatment of adult patients with newly diagnosed Philadelphia chromosome positive (Ph+) chronic myeloid leukemia (CML) in the chronic phase * Chronic, accelerated or blast phase CML with resistance or intolerance to prior therapy including imatinib * Ph+ acute lymphoblastic leukemia (ALL) and lymphoid blast CML with resistance or intolerance to prior therapy Compared to imatinib, dasatinib in CML achieves faster and better responses. Dasatinib is known for its selected toxicities (fluid retention, edema, pleural effusion, and hematological toxicity) requiring dose reductions or treatment interruptions; these toxicities are more frequent in the first two years of treatment. A randomized dose optimization trial for QD dosing vs. BID dosing has demonstrated non-inferiority with regards to efficacy with an improved toxicity profile. In a pilot study, analyzing patients with dasatinib toxicity, a fixed dasatinib weekend holiday allowed safe toxicity management without impairing efficacy. Furthermore the alternated schedule was also able to improve response parameters in patients that had never achieved an acceptable response prior to the onset of dasatinib holiday dosing schedule. The biological rationale for a holiday dosing schedule is that dasatinib has shown an improved cell death of CML cells even after short exposure times; this improved cell death exceeds the killing rate observed with imatinib in vitro. In summary, the reported preclinical and clinical evidence indicates that efficacy seems to require adequate dasatinib Cmax, while low Cmin (five half-lives between doses) does not impair efficacy nor induces drug resistance. It is speculated that a weekend holiday, allowing a better tolerability, would improve patients' drug adherence. The Investigators hypothesize that a dasatinib holiday schedule (5x100mg+2x0mg weekly) compared to a regular dose (7x100mg weekly) will reduce the rate of clinically significant toxicity (e.g., fluid retention, hematological toxicity, musculoskeletal pain) by 20% observed within the first two years of treatment. The Investigators also hypothesize that the dasatinib holiday schedule is non-inferior to dasatinib regular dose in achieving the European LeukemiaNet (ELN) recommended levels of response within the first 24 months.
Investigators
Prof. Dr. med. Andreas Hochhaus
Director of the Clinic of Internal Medicine II
University of Jena
Eligibility Criteria
Inclusion Criteria
- •Male or female patients with diagnosis of CP-CML with cytogenetic confirmation of Ph+ chromosome \[t(9;22)(q34;q11)\].
- •Ph negative cases or patients with variant translocations who are BCR-ABL positive in multiplex PCR4 will be also considered eligible.
- •ECOG performance status ≤
- •Age ≥ 18 years old (no upper age limit is given)
- •Serum levels of potassium, magnesium and total calcium within the normal limits (≥LLN \[lower limit of normal\] and ≤ULN \[upper limit of normal\]). Correction of electrolytes' levels with supplements to meet enrolment criteria is allowed.
- •AST and ALT ≤2.5 x ULN or 5.0 x ULN if considered due to leukemia
- •Alkaline phosphatase ≤2.5 x ULN unless considered due to leukemia
- •Total bilirubin ≤1.5 x ULN, except known Gilbert disease
- •Serum creatinine ≤2 x ULN
- •Written informed consent prior to any study procedures being performed.
Exclusion Criteria
- •Previous allogeneic stem cell transplantation (AlloSCT)
- •Known impaired cardiac function, including any of the following:
- •Congenital long QT syndrome
- •History of or presence of clinically significant ventricular or atrial tachyarrhythmia
- •QTc \>450 msec on screening ECG
- •Myocardial infarction within 6 months prior to starting therapy
- •Other clinical significant heart disease (e.g. unstable angina pectoris, congestive heart failure)
- •Acute or chronic viral hepatitis with moderate or severe hepatic impairment (Child-Pugh scores \>6), even if controlled
- •Other concurrent uncontrolled medical conditions (e.g., active or uncontrolled infections, acute or chronic liver and renal disease) that could cause unacceptable safety risks or compromise compliance with the protocol
- •Impaired gastrointestinal function or disease that may alter the absorption of study drug (e.g., ulcerative disease, uncontrolled nausea, vomiting and diarrhea, malabsorption syndrome, small bowel resection or gastric by-pass surgery)
Arms & Interventions
A. Standard arm
100mg dasatinib (SPRYCEL®) daily dose (QD) (7x100) (Standard therapy)
Intervention: dasatinib (SPRYCEL®)
B. Study arm
100mg dasatinib (SPRYCEL®) (QD) weekdays (1-5) only (5x100+2x0) (overall dose reduction per week)
Intervention: dasatinib (SPRYCEL®)
Outcomes
Primary Outcomes
Rate of molecular Response
Time Frame: month 24
The co-primary endpoint of the study is: rate of major molecular response (MMR) as assessed by BCR-ABL (IS \[International Score\] in %) -monitoring by 24 months to safeguard non-inferiority of the test cohort.
cumulative toxicity score
Time Frame: month 24
The cumulative toxicity score after two years of dasatinib treatment. More specifically, toxicity will be assessed taking into account both the rate of grade 2-4 toxicities and the cumulative severity of adverse events of specific interest. The following AEs of specific interest will be used to compose the cumulative toxicity score: 1. Pleural effusion 2. Fluid retention, other (edema, pericardial effusion, pulmonary arterial hypertension, congestive heart failure, pulmonary edema) 3. Hematological toxicity (neutropenia, thrombocytopenia, anemia) 4. Others (Musculoskeletal pain, skin toxicity (rash), gastrointestinal toxicity (nausea, diarrhea, abdominal pain, vomiting)
Secondary Outcomes
- Quality of life assessment(month 24)
- Rate of molecular Response(6 and 12 months)