This clinical trial is focused on studying the effectiveness of a medication called tofacitinib in treating psoriatic arthritis, a type of arthritis that affects some people with the skin condition psoriasis. The purpose of the study is to identify certain factors that might predict how well patients respond to treatment with tofacitinib. Tofacitinib is taken orally in the form of a tablet. Other medications involved in the study include methotrexate, which can be administered either as a tablet or as an injection, and etanercept, which is given as an injection.
Participants in the study will be divided into groups based on their previous treatment history. Some participants may have used medications like methotrexate, sulfasalazine, or leflunomide, while others may not have used these treatments before. The study will last for a period of 16 weeks, during which participants will receive either tofacitinib or a placebo. The researchers will collect various types of data, including clinical, molecular, and imaging information, to understand how these factors might influence the effectiveness of tofacitinib in treating psoriatic arthritis.
The main goal is to see if participants achieve what is known as Minimal Disease Activity by the end of the study. This means that the symptoms of psoriatic arthritis are significantly reduced. The study will also look at changes in certain clinical scores and molecular profiles before and after treatment. This research aims to improve understanding of how tofacitinib works and to help doctors predict which patients are most likely to benefit from this treatment.



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