ICAM1 and rheumatoid arthritis: Based on the NCBI/GEO/GSE55457/77298/55235 data, in the synovial tissue samples of RA patients, the expression of genes encoding several integrin subunits (α4, αM, β1, β2, and αL), ICAM-1, and SIRP-α was significantly and positively correlated with CD47 expression (Supplementary Figure S1).