CD86 and Behcet disease: Frequencies of CD86+ cells in peritoneal macrophages of 1 μmol CD83 siRNA-treated BD mice were also decreased compared to those in the scramble siRNA-treated control group (0.65 ± 0.35% vs. 1.37 ± 0.28%, p = 0.009), although no significant differences were found in PBL (Figure 3(h)).