CBLB and rheumatoid arthritis: According to RT-qPCR data, there was substantially lower circ-CBLB expression in the RA-FLS + M0 + TNF-α group than in the RA-FLS + M0 group, with no differences in circ-CBLB expression among the RA-FLS + M0 + TNF-α + pcDNA3.1-NC, RA-FLS + M0 + TNF-α + si-NC, and RA-FLS + M0 + TNF-α groups.