Fig. 5From: Preosteoclast plays a pathogenic role in syndesmophyte formation of ankylosing spondylitis through the secreted PDGFB — GRB2/ERK/RUNX2 pathwayImmunochemistry analysis of the spinal entheseal tissues of AS patients and traumatic injury patients. A Elevated expression of the PDGFB, GRB2, P-ERK, and RUNX2 in AS patients. B Relative positive area of target protein in the sections were quantifiedBack to article page