PTGS2 and Miyoshi myopathy: PTGS2 (COX2) expression was significantly upregulated in MM as compared to HD BM-MSC (FC = 2.03 and adj p-value = 0.12), in post-treatment BM-MSC (FC = 2.52 and adj p-value = 0.03), and was higher in ER BM-MSC compared to HD BM-MSC (FC = 2.95 and adj p-value = 0.03) (Figure 5A).