As special findings in our research, distinct features of Treg cells in CBIA patients not shared with RA included high levels of chemotaxis markers, such as CXCR4, CXCR6, and CCR4, while RA patients exhibited increased levels of CD11a, CD11b, CD18, and importantly, CD45RA. Here, ITGB2 is linked to rheumatoid arthritis.