RBP4 Protein Levels May Predict Responses to Humira in AS

Lower blood levels of retinol-binding protein 4 (RBP4) — a protein associated with inflammation, among other processes — in people with ankylosing spondylitis (AS) are associated with better treatment responses to Humira (adalimumab), a study shows. These findings suggest that RBP4 may be used as a biomarker to…