We also found that icaritin exhibited significantly growth-inhibiting effect on CD138+ MM cells (n = 14, IC50 = 10.31 μM, 48 h), corresponding to primary MM cells from BMMCs (n = 28, IC50 = 20.91 μM, 48 h) and BMMCs of normal controls (n = 11, IC50 = 240.5 μM, 48 h) (Figure 1B). Here, SDC1 is linked to Miyoshi myopathy.