CCNA2 and rheumatoid arthritis: In addition, immunohistochemistry staining showed the attenuated expression of TGM2, WTAP, Myc, ABCG2, CCNA2, and vimentin induced by OS in CIA models (Figure 6F), further verifying the regulatory role of OS in TGM2‐mediated pathological phenotype of RA‐FLS.