TLR2 and rheumatoid arthritis: The expression of TLR2 in ST fibroblasts of patients with RA is regulated by TNF, IL-1, LPS, and miR-19 (Iwahashi et al. 2004; Ospelt et al. 2008; Seibl et al. 2003; Jung et al. 2007; Meng et al. 2010; Sacre et al. 2007; Kim et al. 2007).