Safety, Pharmacokinetics, and Pharmacodynamics of Oral Azacitidine in Subjects With Myelodysplastic Syndromes, Chronic Myelomonocytic Leukemia and Acute Myelogenous Leukemia

Inclusion Criteria:

18 years or older.
Diagnosis of low or Int-1 risk MDS
Low platelet count, and/or low hemoglobin, and/or RBC transfusion-dependent and/or platelet transfusion-dependent
ECOG Performance status 0-2
Standard safety inclusion for serum creatinine, AST, ALT, bilirubin.
Serum bicarbonate greater than or equal to 20 mEq/L.
Use of acceptable birth control.
Signed, written informed consent.

Exclusion Criteria:

Diagnosis of acute PML.
Previous or concurrent malignancy.
Prior treatment with azacitidine or other demethylating agents.
Treatment with any anticancer therapy or investigational drugs within 21 days.
Hypersensitivity to azacitidine or mannitol.
Presence of GI disease.
Active, uncontrolled infection.
Known Human Immunodeficiency Virus (HIV) or Hepatitis C, or known active viral Hepatitis B.
Breastfeeding or Pregnant females;
Presence of serious illness, medical condition, or other medical history which would be likely to interfere with a subject's participation in the study or with the interpretation of the results.
Current congestive heart failure (NY Heart Association Class III-IV), unstable angina or angina requiring surgical or medical intervention within 6 months, myocardial infarct within 6 months, or uncontrolled cardiac arrhythmia.