Safety Assessment of a Multipeptide-gene Vaccine in CML

Inclusion Criteria:

• Patients with Philadelphia chromosome positive CML who are:

  1. of subtype b3a2
  2. In first complete hematologic response;
  3. have received imatinib for > 12 months of which the last 3 months were at a stable dose of at least 400 mg/day;
  4. have PCR detectable BCR-ABL transcript by qRT-PCR, and
  5. with persistent disease, as defined by <1 log reduction in peripheral blood or bone marrow BCR-ABL transcripts levels compared with a standardized baseline.
• Greater than or equal to 18 years in age
• No known infection with human immunodeficiency virus
• Physician and patient willingness to maintain the baseline dose of imatinib throughout the study period
• Written informed consent obtained from the patient

Exclusion Criteria:

• Female patients who are pregnant or breast feeding or adults of childbearing age who are not using adequate birth control.
• Current use of systemic immunosuppressive medications
• ALT or AST >3X Upper limit Normal
• Prior allogeneic stem cell transplantation
• Other experimental therapy within the past two months
• Prior participation in vaccine studies within the past six months
• Oxygen saturation of less than 95% at room air
• History of recent acute myocardial infarction, unstable angina, or pulmonary decompensation requiring hospitalization within the past 3 months.
• Concurrent and or uncontrolled psychiatric or medical condition which may interfere with the study completion.