AEG35156 in Combination With High-dose Cytarabine and Idarubicin in AML Following Failure of a Single Standard Dose Cytarabine Based Frontline Induction Regimen

Inclusion Criteria: * Patients with AML, except those with APL (acute promyelocytic leukemia), failing a single standard dose cytarabine based frontline induction regimen. The diagnosis of refractory AML is based on the presence of either \> 10% blasts in marrow or blood or 5-10% blasts in either site together with cytopenia (Hb \< 10 g/dL, or platelets \< 100 x 109/L, or neutrophil count \< 1.0 x 109/L). * Patients must have an Eastern Cooperative Oncology Group (ECOG) performance status of ≤2. * Male, or female patients who are post-menopausal (amenorrheic for at least 12 months), or surgically or biologically sterile. * Patients must have adequate organ and immune function as indicated by the following laboratory values: Parameter Laboratory Values Serum creatinine; ≤2.0 mg/dL (≤ 177 μmol/L Total Bilirubin ≤2.0 mg/dL (≤ 34 μmol/L) AST (SGOT) and ALT (SGPT) ≤3 X ULN * The patient must understand, be able and willing and likely to fully comply with study procedures, including scheduled follow-up, and restrictions. Exclusion Criteria: * Clinical evidence of ongoing grade 3 or 4 non-hematological toxicities from the initial standard dose cytarabine-based induction chemotherapy * Patients with a prior history of peripheral neuropathy of grade 2 or higher. * Clinical evidence of active CNS leukemic involvement. * Active and uncontrolled infection. Patients with an infection who are under active treatment with antibiotics and whose infections are controlled may be entered to the study. * Current evidence of invasive fungal infection (blood or tissue culture). * Current evidence of an active second malignancy except for non-melanoma skin cancer. * Uncontrolled medical problems, unrelated to the malignancy, or of sufficient severity that in the opinion of the investigator, impair a patient's ability to give informed consent or unacceptably reduce the safety of the proposed treatment. * Neurological or psychiatric disorders that would interfere with consent or study follow-up. * Known or suspected intolerance or hypersensitivity to the study drugs \[or closely related compounds\] or any of their stated ingredients. Study drugs being the antisense, cytarabine and idarubicin. * History of alcohol or other substance abuse within the last year. * Use of another investigational agent within the last 14 days prior to enrolment. Patients who have received a previous antisense agent in the last 90 days will be excluded. * Female patients who are pregnant, lactating, or with a positive pregnancy test at screening must be excluded.