This phase I, randomized, double-blind, placebo controlled study is to investigate the safety, tolerability and pharmacokinetics (PK) of topically administered YJ001 in a single-ascending dose (SAD) fashion in healthy volunteers between 18 to 55 years of age, to establish the dosage range for spray use, and to provide a dosage regimen for Phase I multiple-ascending dose (MAD) study in healthy subjects. The study is to enroll 4 cohorts, the doses of which are 148, 296, 552 and 828 mg, with the option to enroll 2 additional cohorts (8 subjects for each cohort) without requiring a protocol amendment. Each cohort will consist of 8 subjects (6 active; 2 placebo). Each subject will be administered a single dose of YJ001 as multiple sprays (8 sprays/foot for Cohort 1, 16 sprays/foot for Cohort 2, 16 sprays/foot for Cohort 3, and 24 sprays/foot for Cohort 4) topically on both feet; and below the ankle, with the administration area set as 450 cm2 (both feet).~Safety will be evaluated by assessing incidence and severity of adverse events (AEs) and serious adverse events (SAEs); observed values and changes in baseline of clinical safety laboratory test results, 12-lead electrocardiogram (ECG), vital signs; and physical examination inclusive of skin reaction findings at the Investigational Product (IP) administration sites.~For pharmacokinetics evaluation, serial blood samples will be collected in the subjects of Cohorts 2 to 4 for up to 7 days following a single dose to assess the PK of YJ001 and metabolites in plasma. Pooled urine samples will be collected in the subjects of Cohorts 2 to 4 to evaluate renal excretion of YJ001 and metabolites.~Subjects will be screened between Day -28 and Day -2 and will be admitted to the clinic on Day -1. Subjects will be housed within the clinic from Day -1 through Day 8 and will be discharged on Day 8 after all scheduled study procedures have been completed.
This phase I, randomized, double-blind, placebo controlled study is to investigate the safety, tolerability and pharmacokinetics (PK) of topically administered YJ001 in a single-ascending dose (SAD) fashion in healthy volunteers between 18 to 55 years of age, to establish the dosage range for spray use, and to provide a dosage regimen for Phase I multiple-ascending dose (MAD) study in healthy subjects. The study is to enroll 4 cohorts, the doses of which are 148, 296, 552 and 828 mg, with the option to enroll 2 additional cohorts (8 subjects for each cohort) without requiring a protocol amendment. Subjects will be screened between Day -28 and Day -2 and will be admitted to the clinic on Day -1. Subjects will be housed within the clinic from Day -1 through Day 8 and will be discharged on Day 8 after all scheduled study procedures have been completed.