Blood protein may reveal clues about ankylosing spondylitis

This study looks at a protein called progranulin in the blood of people with ankylosing spondylitis (a type of arthritis that affects the spine) and compares it to healthy volunteers. Researchers want to see if progranulin levels are linked to disease activity and whether they change with TNF-α inhibitor treatment. The goal is to find a new biomarker that could help monitor the disease.