CNBP and myotonic dystrophy type 1: Stable RNAs derived from each of the repeat expansions (CUG for DM1 and CCUG for DM2) have been shown to adversely affect developmentally regulated splicing factors in a tissue-specific manner leading to neuromuscular dysfunction (Braz et al., 2018; Matloka et al., 2018; Mohan et al., 2014).