DF-5112

This is a double-blind, randomized, placebo-controlled, single ascending dose (SAD) study to evaluate safety, tolerability, pharmacokinetics (PK), immunogenicity and pharmacodynamics (PD) of DF5112 in healthy adult participants. A total of 64 participants are planned to be randomized into 8 cohorts. Additional cohorts at intermediate dose levels may be evaluated. Each cohort will include 8 healthy participants randomized to receive DF5112 or placebo through intravenous (IV) or subcutaneous (SC) administration. Following dose administration participants will be confined at the clinical research unit for observation for approximately 1 week and then will return for subsequent pre-identified follow up visits through at least Day 29, Day 57, or Day 85 (length of follow-up is determined by the cohort).