A Study to Investigate the Safety, Tolerability, and Pharmacokinetics of VS 105

In Part 1, single ascending doses of VS-105 or placebo will be administered to approximately 5 cohorts of 8 healthy subjects in each cohort with 6 receiving active and 2 receiving placebo.

In Part 2, multiple ascending doses of VS 105 or placebo will be administered each morning over 7 consecutive days to approximately 3 cohorts of 8 healthy subjects in each cohort with 6 receiving active and 2 receiving placebo..

In Part 3, multiple ascending doses of VS 105 will be administered over 14 consecutive days to approximately 3 cohorts that will each include 4 hemodialysis subjects with 3 receiving active drug and 1 receiving placebo.