Evaluation of a New Anti-cancer Immunotherapy After Chemotherapy in Adult Patients With Acute Myeloid Leukemia

Inclusion Criteria:

1. The patient has cytologically proven AML, as defined by the WHO classification. The pretreatment AML karyotype should be documented. Patients with acute promyelocytic leukemia with t(15;17)(q22;q12), (PML/RARα) and variants should be excluded.
2. The leukemia could be a de novo or secondary AML.
3. The patient received induction and consolidation therapy according to the Institution's standard of care.
4. The patient's blasts cells show expression of WT1 transcript, detected by quantitative RT-PCR.
5. The patient is in first morphologic complete remission (CR1):
6. Written informed consent has been obtained prior to the performance of any protocol-specific procedure.
7. The patient is ≥ 18 years of age at the time of signature of the informed consent form.
8. Eastern Cooperative Oncology Group performance status of 0, 1 or 2 at the time of enrolment.

9. Adequate hepatic and renal function defined as:

   • Serum bilirubin < 1.5 times the Upper Limit of Normal (ULN).
   • Serum ALT < 2.5 times the ULN.
   • Calculated creatinine clearance > 50 ml/min.
10. If the patient is female, she must be of non-childbearing potential, i.e. have a current tubal ligation, hysterectomy, ovariectomy or be post-menopausal, or if she is of childbearing potential, she must practice adequate contraception for 30 days prior to treatment administration, have a negative pregnancy test and continue such precautions for two months after completion of the treatment administration series.
11. In the view of the investigator, the patient can and will comply with the requirements of the protocol.

Exclusion Criteria:

1. The patient is in morphologic leukemia-free state or in morphologic complete remission with incomplete blood count recovery (CRi) as defined by "Recommendations of the International Working Group for Diagnosis, Standardization of Response Criteria, Treatment Outcomes, and Reporting Standards for Therapeutic Trials in Acute Myeloid Leukemia"[Cheson 2003].
2. The patient has acute promyelocytic leukemia with t(15;17)(q22;q12), (PML/RARα) or variants.
3. The patient has received, is receiving -or is due to receive- induction chemotherapy followed by Stem Cell Transplantation.
4. The patient has (or has had) previous or concomitant malignancies, except effectively treated malignancy that is considered by the investigator highly likely to have been cured.
5. The patient has hypercalcemia.
6. The patient is known to be HIV-positive.
7. The patient has symptomatic autoimmune disease such as, but not limited to multiple sclerosis, lupus, and inflammatory bowel disease.
8. The patient has a history of allergic reactions likely to be exacerbated by any component of the study investigational product.
9. The patient has other concurrent severe medical problems, unrelated to the malignancy, that would significantly limit full compliance with the study or expose the patient to unacceptable risk.
10. The patient has a history of congestive heart failure, coronary artery disease or previous myocardial infarction.
11. The patient has psychiatric or addictive disorders that may compromise his/her ability to give informed consent, or to comply with the trial procedures.
12. The patient has received any investigational or non-registered medicinal product other than the study medication within 30 days preceding the first dose of study medication or plans to receive such a drug during the study period.
13. The patient requires concomitant treatment with systemic corticosteroids or any immunosuppressive agents. The use of prednisone, or equivalent, <0.5 mg/kg/day (absolute maximum 40 mg/day), or inhaled corticosteroids or topical steroids is permitted.
14. The patient has received intravenous administration of antibiotics within 2 weeks prior to first study treatment or oral antibiotics within 1 week prior to first study treatment.
15. For female patients: the patient is pregnant or lactating.