MMP9 and Miyoshi myopathy: Single gene analysis revealed lower expression of the most specific previously described MPC markers, including osteopontin (SPP1), CD18 (ITGB2), CD11b (ITGAM), CD11c (ITGAX), and matrix metallopeptidase 9 (MMP9), from 0.07 to 0.03 fold, in MM samples (n=5, Figure 4B).