Details on TG2 expression in SFMCs from healthy donors and patients with GA, osteoarthritis or rheumatoid arthritis are given in Figure 1B. Our data confirm previous observations for the enhanced expression of TG2 in SFMCs from osteoarthritis patients [32] and demonstrate for the first time the enhanced expression of TG2 in gout as well. This evidence concerns the gene TGM2 and rheumatoid arthritis.