TLR2 and synovial sarcoma: Using PBMCs from patients with SS, we also showed that stimulation of TLR2, TLR4, and TLR6 with specific ligands additively promoted the production of IL-17 and IL-23 in the presence of TLR2 stimulation, thus verifying that the increased TLRs and IL-17 in the salivary glands of patients with SS are biologically meaningful.