Comparing Imatinib Standard Dose With Imatinib High Dose Induction in Pretreated Chronic Myeloid Leukemia (CML) Patients in Chronic Phase
Recruitment status was: Recruiting
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Multicenter, Phase III Study Comparing Imatinib (STI571, Glivec®) Standard Dose (400 Mg/Day) With Imatinib High Dose Induction (800 Mg/Day) Followed by Standard Dose Maintenance (400 Mg/Day) in Pretreated CML Patients in Chronic Phase|
- To determine the efficacy regarding major cytogenetic response within 12 months after randomization
- To determine the major cytogenetic response after 3 months versus 6-12 months after randomization
- To determine the efficacy of the molecular response within 12 and 24 months after randomization
- To determine the time to molecular progression within 24 months
- To determine the dynamics of the molecular response within 3 and 6 months after randomization expressed as the slope decreases in BCR-ABL-transcripts
- To determine tolerability
|Study Start Date:||January 2004|
|Estimated Study Completion Date:||December 2008|
Patients with CML not achieving or losing a major cytogenetic response on whatever palliative treatment for CML, are at high risk to progress to accelerated phase and blast crisis. A new promising treatment with Imatinib (Glivec®), a tyrosine-kinase inhibitor, has been introduced recently. High rates of hematologic and cytogenetic responses can be achieved with Imatinib (Glivec®) at > = 300 mg/day in chronic phase CML patients that are refractory, resistant or intolerant to interferon-alpha. However, about 10 – 20% of these high risk patients will lose their response to Imatinib (Glivec®) within 1-2 years. Therefore, improvement of the treatment is warranted.
Since cytogenetic response rate is correlated to survival and the resistance to Imatinib (Glivec®) might be caused by mutations in the receptor, a more rapid decrease could lead to longer survival and/or less resistance development. In the initial 6 months of treatment, monotherapy with Imatinib (Glivec®) with a dose of 800 mg/day (high dose) should be more effective in the reduction of a high leukemic tumor burden, thereby allowing the residual normal progenitor and stem cells to expand. In addition, high dose Imatinib (Glivec®) should further improve the induction of a molecular response, as determined by quantitative reverse transcription polymerase chain reaction (RT-PCR), reducing the risk of relapse from residual malignant BCR-ABL positive cells.
This study will investigate the efficacy and tolerability of a short (6 months) high dose therapy followed by a standard dose compared to a continuous treatment with a standard dose of Imatinib (Glivec®).
In addition, the dynamics of the molecular and cytogenetic response will be investigated. Finally, the study will investigate the effect of this induction-maintenance concept on time-to-progression (TTP).
Please refer to this study by its ClinicalTrials.gov identifier: NCT00327262
|Medical University Innsbruck|
|Innsbruck, Tyrol, Austria, 6020|
|Study Chair:||Guenther Gastl, MD||Medical University Innsbruck|