CD4 and systemic lupus erythematosus: The results showed that compared with the control group, the proportions of naive B cells, CD8 T cells, CD4 memory resting T cells, CD4 memory activated T cells, and resting natural killer (NK) cells in SLE were significantly lower, while monocytes, macrophages M0, activated dendritic cells, neutrophils were higher (Figure 5A).