PTEN and rheumatoid arthritis: Overexpression of miR-26a-5p significantly suppressed the luciferase activity of psiCHECK-2-PTEN-W 3′UTR in RA-FLS, whereas had no effect on the luciferase activity of psiCHECK-2-PTEN-M 3′UTR (Figure 6B).