This study aims at evaluating the efficacy of treatment with ponatinib in patients with chronic myeloid leukemia who are in a chronic phase and who previously received treatment with imatinib but resulted to be resistant to it.
Name: Ponatinib
Description: Ponatinib is given orally 30 mg daily, with dose adjustment to 15 mg daily once a BCR-ABL1 level minor or equal to 0.1% (MMR) has been achieved and confirmed in the next test, 4 weeks apart. A return to prior, 30 mg, dose is due in case of return of BCR-ABL1 transcripts level to > 1%. Dose adjustments for toxicity are detailed in the protocol.Type: DrugPonatinib
Description: Cytogenetic response (CyR) is defined based on the percentage of Ph pos metaphases, as evaluated by chromosome banding analysis (CBA) of at least 20 marrow cell metaphases: Major Cytogenetic Response if Ph pos metaphases < 35% Complete (CCyR) if Ph pos metaphases 0 or FISH BCR-ABL1 nuclei minor or equal to 1% Partial (PCyR) if Ph pos metaphases 1-34% Minor (mCyR) if Ph pos metaphases 35-65% Minimal or none (min/none CyR) if Ph pos metaphases > 65% If marrow cell metaphases cannot be obtained or analysed, interphase fluorescence-in-situ-hybridization (FISH) can be used, but only to distinguish a CCyR (minor or equal to 1% positive nuclei out of at least 200 nuclei) from a non CCyR. FISH data cannot be used to classify a response as minimal, minor, or partial.
Measure: Number of patients with major cytogenetic response Time: After 52 weeks of ponatinib treatment startSingle Group Assignment
There is one SNP
Exclusion Criteria: 1. Accelerated or blastic phase CML 2. Patients previously treated with nilotinib or dasatinib 3. Patients with the T315I mutation 4. History of acute pancreatitis within 1 year of study or history of chronic pancreatitis or of alcohol abuse 5. Patients with history of acute myocardial infarction (AMI), unstable angina or coronary heart disease (CHD), congestive heart failure, cerebrovascular events (CVE) (stroke or transitory ischemic attack), or peripheral artery occlusive disease (PAOD) 6. Compelled to take medications that are known to be associated with Torsades de Pointes and/or with significant QTc prolongation 7. Pregnant or breastfeeding 8. Any condition or illness that, in the opinion of the Investigator, would compromise patient safety or interfere with the evaluation of the drug 9. Lack of informed consent Inclusion Criteria: 1. Cytogenetic and/or molecular confirmed diagnosis of Ph+ and/or BCR-ABL1+ CML 2. Age ≥ 18 years 3. Chronic phase CML 4. Prior treatment with imatinib, any dose 5. Resistance to imatinib, as defined by any one of the ELN 2013 failure criteria, as follows: - no complete hematologic response (CHR) at 3 months - no cytogenetic response (CyR) (Ph+ > 95%) at 3 months - Less than partial CyR (PCyR, Ph+ > 35%) at 6 months - BCR-ABL1 > 10% at 6 months - Non complete CyR (CCyR) (Ph+ > 0%) at 12 months - BCR-ABL1 > 1% at 12 months - Loss of CHR, at any time - Loss of CCyR, at any time - Confirmed loss of major molecular response (MMR) (BCR-ABL1 bigger or equal to 0.1% in two consecutive tests, of which one bigger or equal to 1%), at any time - Any new BCR-ABL1 mutation, at any time 6. --- T315I ---
Exclusion Criteria: 1. Accelerated or blastic phase CML 2. Patients previously treated with nilotinib or dasatinib 3. Patients with the T315I mutation 4. History of acute pancreatitis within 1 year of study or history of chronic pancreatitis or of alcohol abuse 5. Patients with history of acute myocardial infarction (AMI), unstable angina or coronary heart disease (CHD), congestive heart failure, cerebrovascular events (CVE) (stroke or transitory ischemic attack), or peripheral artery occlusive disease (PAOD) 6. Compelled to take medications that are known to be associated with Torsades de Pointes and/or with significant QTc prolongation 7. Pregnant or breastfeeding 8. Any condition or illness that, in the opinion of the Investigator, would compromise patient safety or interfere with the evaluation of the drug 9. Lack of informed consent Chronic Myeloid Leukemia Chronic Phase Adults Leukemia Leukemia, Myeloid Leukemia, Myelogenous, Chronic, BCR-ABL Positive Phase 2, single-arm, multicentre, open label. --- T315I ---