EDP167

Primary study objectives: (1) To evaluate the safety and tolerability of a single subcutaneous injection of EDP167 in adult subjects. Secondary study objectives: (1) To evaluate the pharmacokinetic characteristics of a single subcutaneous injection of EDP167 in adult subjects; (2) To evaluate the pharmacodynamic characteristics of a single subcutaneous injection of EDP167 in adult subjects; (3) To evaluate the effect of EDP167 injection on the QT interval by C-QT analysis; (4) To preliminarily evaluate the immunogenicity of EDP167. Exploratory study objectives: (1) To evaluate the exposure-effect relationship of a single subcutaneous injection of EDP167 in adult subjects; (2) To evaluate the characteristics of potential metabolites of a single subcutaneous injection of EDP167 in adult subjects.