QLS12010

The objective of this randomized, double-blind, placebo-controlled phase II clinical trial is to investigate the safety and efficacy of QLS12010 in subjects with moderate-to-severe rheumatoid arthritis.The main questions it aims to answer are:
• Efficacy and safety of QLS12010 in participants with rheumatoid arthritis.
Participants will be randomly allocated to four treatment groups at a 1:1:1:1 ratio to compare the efficacy and safety of different dosages of QLS12010 Capsules against the placebo.

The goal of this clinical trial is to evaluate the safety, tolerability, PK, and PD of single and multiple ascending doses of QLS12010 Capsules and the effect of food on their PK profiles in healthy adult participants and participants with atopic dermatitis. This study consists of four parts: Part A is a single ascending dose (SAD) study, once sufficient safety and PK data are obtained from the SAD cohorts, the SMC will determine the dosage of initial cohort in Part B, which consists of three multiple ascending doses (MAD) cohorts of QLS12010 Capsules. Part C is a randomized, open-label, two-cycle, crossover food effect study under fasting and fed (high-fat meal) conditions. Part D is to evaluate the safety, tolerability, pharmacokinetic (PK), pharmacodynamic (PD) characteristics, and preliminary efficacy of QLS12010 Capsules following multiple oral administrations in adult participants with atopic dermatitis (AD).