Study of Oral Dasatinib in Subjects With Myelodysplastic Syndrome (MDS) and Excess Marrow Blasts
The main purpose of this study is to learn how patients with myelodysplastic syndrome (MDS) respond to the study drug dasatinib. The study drug, dasatinib, has been approved by the U.S. Food and Drug Administration (FDA) for treatment of leukemia, but has not been approved for the treatment of other kinds of cancer. The use of dasatinib in this study is considered experimental.
|Study Design:||Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||A Pilot Study of Oral Dasatinib in Subjects With MDS and Excess Marrow Blasts|
- Number of Participants With Marrow Complete Remission (CR) [ Time Frame: 1 Year 4 Months ] [ Designated as safety issue: No ]
Complete remission (modified IWG); IWG = International MDS Working Group.
Bone Marrow Response must last ≥4 weeks. Bone marrow evaluation: Bone marrow showing ≤5% myeloblasts with normal maturation of all cell lines.
- Number of Participants With Hematologic Improvement [ Time Frame: 1 Year 4 Months ] [ Designated as safety issue: No ]Hematologic improvement in platelets, red blood cell (RBC), neutrophils according to modified IWG Criteria; Cytogenetic response (modified IWG); Change in percentage of blasts in bone marrow and peripheral blood; Src-Tyr416 phosphorylation in medullary myeloblasts. Hematologic improvements must last ≥ 8 weeks.
- Number of Participants With Partial Remission (PR) [ Time Frame: 1 Year 4 Months ] [ Designated as safety issue: No ]Partial remission (PR) (modified IWG); IWG = International MDS Working Group. All of the CR criteria (if abnormal prior to treatment), except: Bone marrow evaluation: Blasts decreased by ≥ 50% over pretreatment but still >5%. Cellularity and morphology are not relevant.
- Number of Participants With Stable Disease (SD) [ Time Frame: 1 Year 4 Months ] [ Designated as safety issue: No ]
|Study Start Date:||February 2008|
|Study Completion Date:||May 2012|
|Primary Completion Date:||May 2012 (Final data collection date for primary outcome measure)|
Experimental: Dasatinib Dose Escalation
Patients will be started on dasatinib at a continuous oral daily dose of 100 mg per day. At 8 weeks, if the initial dose is well tolerated and patient has not achieved a partial response, the dose may be increased to 150 mg per day. All patients will be followed per protocol for a total core period of 16 weeks from the first dose. Responding patients will continue dasatinib treatment for up to 48 weeks in the absence of treatment failure, disease progression, limiting toxicity or death. Patients continuing after 48 weeks will be enrolled in a separate extension study for future follow up.
DOSE ESCALATION OF DASATINIB AFTER 8 WEEKS IF ELIGIBLE
DOSE MODIFICATION OF DASATINIB
Other Name: SPRYCEL®
Study Core Period:
The first 16 weeks after the initial dose of dasatinib is called the Study Core Period. Patients who are eligible and chose to participate in this study should expect to take 100 mg of dasatinib daily for 8 weeks. If the study doctor believes that they have not achieved a partial response after 8 weeks of treatment, the dose may be increased to 150 mg per day. The study doctor may lower the dosage of dasatinib if the 100 mg treatment is too strong. If the lower dose of dasatinib is still too strong, the study doctor may decide to take the patient off of the study. The patient will continue to receive supportive care as needed during the duration of the trial as well as after completion of the trial.
During the Study Core Period, participants will have a study visit every 4 weeks. Complete Blood Counts (CBCs) will be obtained every 2 weeks for study purposes and disease monitoring. Bone marrow aspiration and biopsy will be obtained at screening, and at 8 weeks and 16 weeks of treatment for response assessment. Additional bone marrow aspirations and biopsies may be obtained at any other time, to evaluate the disease process, at the doctor's judgment. A bone marrow aspirate and biopsy must be done at the time of study discontinuation.
Study Extension Period:
The time after the first 16 weeks of treatment is called the study extension period. If the patient is responding to the treatment, does not experience disease progression or any severe adverse events, the patient may continue dasatinib treatment for up to 48 weeks. If patients continue after 48 weeks, they will be asked to enroll in a separate extension study for future follow up.
During the Study Extension Period, participants will have a study visit every 4 weeks. Complete Blood Counts (CBCs) will be obtained every 2 or 4 weeks for study purposes and disease monitoring. Bone marrow aspiration and biopsy will be obtained every 16 weeks. A bone marrow aspirate and biopsy must be done at the time of study discontinuation.
|United States, Florida|
|H. Lee Moffitt Cancer Center and Research Institute|
|Tampa, Florida, United States, 33612|
|Principal Investigator:||Alan List, M.D.||H. Lee Moffitt Cancer Center and Research Institute|