A Phase I Clinical Study to Evaluate the Safety, Tolerability, Immunogenicity, Pharmacokinetics, and Pharmacodynamics of Single and Multiple Ascending Doses of HS-20118 in Adult Participants
The study will be conducted in 2 parts (SAD for Part 1 and MAD for Part2). Part 1 is a single-center, randomized, double-blind, placebo-controlled, SAD study to evaluate the safety, tolerability, immunogenicity, and PK of HS-20118 after a single oral dose in healthy participants. Part 2 is a multi-center, randomized, double-blind, placebo-controlled, MAD study to evaluate the safety, tolerability, immunogenicity, PK, and PD of HS-20118 after multiple oral doses in patients with moderate to severe plaque psoriasis .
⁃ For the SAD study:
• Healthy adults aged 18-45 years (inclusive) at the time of signing the informed consent form;
• Male participants weighing ≥ 50 kg and female participants weighing ≥ 45 kg, both ≤ 110 kg; body mass index (weight/square of height (kg/m2)) within the range of 18-28 kg/m2 (inclusive);
• Normal results or abnormal results but without clinical significance in comprehensive examinations, including general physical examination, vital signs, laboratory tests, 12-lead ECG, abdominal color Doppler ultrasound, and chest X-ray from the frontal and lateral position ;
⁃ For the MAD study:
• Male or female participants aged 18-65 years (inclusive) at the time of signing the informed consent form;
• Male participants weighing ≥ 50 kg and female participants weighing ≥ 45 kg, both ≤ 110 kg;
• Chronic plaque psoriasis for at least 6 months with or without psoriatic arthritis;