CD4 and systemic lupus erythematosus: The percentages of CD3+T cell MMP−Low (P < 0.001, Figure 1A), CD3+CD4+ T cell MMP-Low (P < 0.001, Figure 1A), CD3+CD8+ T cells (P < 0.001, Figure 1A), and B cells (P = 0.006, Figure 1A) were significantly lower in patients with SLE than in HCs.