In this context, reduced availability of the splicing factor MBNL1, due to the expression of expanded CUG or CCUG repeats in noncoding regions of the genes encoding the Myotonic Dystrophy Associated Protein Kinase (DMPK) and Zinc Finger Protein 9 (ZNF9), is responsible for Myotonic Dystrophy (DM) [21]. This evidence concerns the gene DMPK and myotonic dystrophy.