CELF1 and myotonic dystrophy type 1: Together, evidence for alteration of SGs in DM1 and our previous observation that MBNL1 localises to SGs following transcriptional arrest in HLECs (Coleman et al., 2014) led us to investigate the presence of the DM1-associated proteins MBNL1 and CUGBP1 in cytoplasmic structures involved in RNA metabolism.