Safety Study of Immune System Modulator for Autoimmune Diseases

Inclusion Criteria: * Subjects with a body mass index (BMI) of 18 - 35 kg/m2, inclusive. BMI = Body weight (kg) / \[Height (m)\]2. * In good health as determined by medical history, physical examination, and clinical judgment of the investigator * Subject with no history of autoimmune disease or cardiac disease * Subjects must be available to complete the study (including follow-up visit). * Subjects must satisfy a medical examiner about their fitness to participate in the study. * Subjects must provide written informed consent to participate in the study. Exclusion Criteria: * A clinically significant history of gastrointestinal disorder likely to influence drug absorption. * Receipt of regular medication within 21 days of the first dose that may have an impact on the safety and objectives of the study (at the Investigator's discretion). * Evidence of renal, hepatic, central nervous system, respiratory, cardiovascular or metabolic dysfunction. * Subjects who are smokers, or ex-smokers who have smoked in the last 3 months (determined by negative urine cotinine at screening visit). * A clinically significant history of hypersensitivity (anaphylaxis, angioedema) to any drug. * A clinically significant history of drug or alcohol abuse. * Participation in a New Chemical Entity clinical study within the previous 4 months or a marketed drug clinical study within the previous 3 months. (N.B. washout period between studies is defined as the period of time elapsed between the last dose of the previous study and the first dose of the next study).