CD8A and rheumatoid arthritis: In our study, the infiltration of immune cells was observed in RA and AS, which also indirectly reflects the relevance of Myocytes, Tgd_cells, Monocytes, Skeletal_muscle, Adipocytes, CD8+_naive_T-cells, Endothelial_cells, aDC, CD8+_Tem, CD4+_Tcm, Macrophages, MSC, Macrophages_M1 and Th2_cells to AS and RA.