TRIM21 and synovial sarcoma: Importantly, anti-nuclear antibodies, such as anti-Ro52/SSA antibodies, which are detected in approximately 60% cases of SS [41], were highly detected in serum collected from the non-treatment, DMEM (−), or BMMSC-CM-administered mice when compared with those in the DPSC-CM group; anti-dsDNA did not have a change for each group (Fig. 3c).