In our inducible HeLa cell model of DM1, the presence of CUGexp RNA resulted in a slight decrease in the Pearson correlation coefficient regarding the colocalisation of GFPMBNL1 and endogenous CUGBP1 within SGs, suggesting an alteration in the interactions of these two proteins with SGs. This evidence concerns the gene CELF1 and myotonic dystrophy type 1.