To investigate the pharmacokinetics of PF-06273588 following administration of a micro-dose via both intravenous and oral routes.

Inclusion Criteria:

• Healthy male subjects between the ages of 18 and 55 years (inclusive). Healthy is defined as no clinically relevant abnormalities identified by a detailed medical history, full physical examination, including blood pressure and pulse rate measurements, 12-lead ECG and clinical laboratory tests.
• Body Mass Index (BMI) of 17.5 to 30.5 kg/m2; and a total body weight > 50 kg (110 lbs).

Exclusion Criteria:

• Evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurologic, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at time of dosing).
• A positive urine drug screen.
• History of regular alcohol consumption exceeding 21 drinks/week for males.