Figure 1
From: Expression of interleukin-18 receptor in fibroblast-like synoviocytes
Heterogeneous and noncorrelated constitutive IL-18Rα and IL-18Rβ mRNA expression in fibroblast-like synoviocytes (FLS) derived from patients with rheumatoid arthritis (RA-FLS) or spondylarthropy (SpA-FLS), but negativity for both IL-18R chains in FLS from patients with osteoarthritis (OA-FLS). Cultures 1–3 were used for IκB-α signal transduction analyses. IL-18R(α, β) = IL-18 receptor(α, β). The monocytic cell line U937 was used for comparison.