CD14 and systemic lupus erythematosus: Besides the elevated expression level of mMer on CD14+ monocyte/macrophages, the plasma sMer level in SLE patients (n = 108, 2170.30 ± 160.87 pg/mL) was also significantly higher (P < 0.001) than that in healthy controls (n = 42, 600.67 ± 115.49 pg/mL) (Figure 2(f)).