This is a Phase 1, randomized, single-blind, placebo-controlled study of five escalating dose levels of SD-101 in healthy male volunteers. The objectives of the study are to assess the safety, tolerability, pharmacokinetic profile, and pharmacodynamics of SD-101. Approximately 40 subjects will participate.~Once subjects have been consented, screened, and assigned to one of the dose levels of SD-101, subjects will receive a single subcutaneous injection of either SD-101 or placebo (PBS) in a ratio of 6:2.~Safety and tolerability will be evaluated by occurrence of adverse events, blood and urine laboratory tests, physical examination findings, vital signs , and electrocardiogram findings. Pharmacodynamics will be evaluated by levels of blood biomarkers and serum cytokines, and flow cytometric cell counts. Pharmacokinetics will be evaluated by levels of study drug in serum.
The main purpose of this study is to assess the safety, tolerability, and biological activity of SD-101 compared with placebo in healthy male volunteers.