Phase I Study of Single/Multiple Ascending Doses of JKN2501 for Injection in Chinese Healthy Volunteers

This Phase I study is a randomized, double-blind, placebo-controlled, dose-escalation trial conducted at a single center. It consists of two parts: Part 1 (SAD): Evaluates the safety, tolerability, and pharmacokinetics (PK) of single ascending intravenous doses of JKN2501 in healthy adults. Biological samples (blood, urine, feces) will be collected for PK analysis. Part 2 (MAD): Evaluates the safety, tolerability, and PK of multiple ascending intravenous doses of JKN2501 in healthy adults. Dose levels may be adjusted based on emerging safety, tolerability, and PK data from preceding cohorts.