IFNB1 and autoimmune polyendocrinopathy: At 3 h after stimulation, IFN-β mRNA expression (Fig. 3C) was lower in the presence of APS (P = 0.026) or CSFV alone (P = 0.016) than in medium control group; however, it was higher in the presence of CSFV pretreated with APS (P = 0.050).