This is a Phase l double-blind, placebo-controlled, randomized study to investigate the safety, tolerability, pharmacokinetics, bioavailability and food effect of single doses of APX001 administered intravenously and orally, followed by an evaluation of the safety, tolerability, pharmacokinetics and drug-drug interaction potential of multiple doses of APX001 administered orally.

Inclusion Criteria:

• Women of childbearing potential must agree to avoid pregnancy during the study and to use contraception at least 2 weeks before the start of the study until 3 months after the last dose of study drug.
• Males with partner(s) of childbearing potential must agree to use appropriate barrier contraception from the screening period until 3 months after the last dose of study drug.
• Screening hematology, clinical chemistry, coagulation and urinalysis consistent with overall good health.
• No significantly abnormal findings on physical examination, ECG and vital signs.
• Willing and able to provide written informed consent.

Exclusion Criteria:

• Any uncontrolled or active major systemic disease including, but not limited to: cardiovascular, pulmonary, gastrointestinal, metabolic, urogenital, neurological, immunological, psychiatric, or neoplastic disorder with metastatic potential.
• History or presence of malignancy within the past year. Subjects who have been successfully treated with no recurrence of basal cell carcinoma of the skin or carcinoma in-situ of the cervix may be enrolled.
• Use of prescription medication within 14 days prior to the first dose of study drug and throughout the study.
• Use of non-prescription or over-the-counter medications within 7 days prior to the first dose of study drug and throughout the study.
• Positive results on any of the following Screening laboratory tests: serum pregnancy test, urine alcohol test, urine drugs of abuse, hepatitis B surface antigen, hepatitis C antibody, and human immunodeficiency virus (HIV) antibody.