CBLB and rheumatoid arthritis: RT-qPCR results showed that circ-CBLB expression in RA-FLSs was higher in the MUT group than in the WT group, whilst circ-CBLB expression was lower in the pcDNA3.1-WTAP + WT and pcDNA3.1-WTAP + MUT groups when compared with the WT and MUT groups, respectively (Figure 8G).