This study is looking at three types of rheumatologic disease that cause joint pain and swelling. The first type is rheumatoid arthritis, which is a condition where the body’s immune system attacks the joints, causing pain, swelling, and stiffness. The second type is axial spondyloarthritis, which is a disease that mainly affects the spine and can cause back pain and stiffness. The third type is psoriatic arthritis, which is a form of arthritis that affects some people who have psoriasis, a skin condition that causes red, scaly patches. All three conditions being studied are described as moderately to severely active, meaning they are causing significant symptoms. The study will test a medication called SPY072, which is given as an injection under the skin. Some participants will receive SPY072 while others will receive placebo.
The purpose of this study is to see if SPY072 can reduce disease activity in people with these three types of rheumatologic disease and to check if the medication is safe. The study will measure how well SPY072 works by looking at different aspects of disease activity. For rheumatoid arthritis, the study will check changes in disease activity at week 12. For axial spondyloarthritis and psoriatic arthritis, measurements will be taken at week 16. The study will also look at how many participants show improvement in their symptoms and will measure the levels of the medication in the blood.
During the study, participants will receive treatment for up to 40 weeks. The study will monitor participants for any unwanted effects or problems that might occur with the medication. The study will also check if the body develops any immune response to the medication. Different measurements will be used depending on which type of rheumatologic disease the participant has, but all are designed to see if the medication helps reduce joint pain, swelling, and other symptoms of the disease.



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