MBNL proteins regulate the splicing of tau alternative exon 2 [70], and we find that ectopic expression of RBFOX1 can partially repress the splicing aberration of tau exon 2 induced in T98 glioblastoma cells by transfecting the CUG repeat expression vector DT960 (Fig. S2). Here, MBNL1 is linked to glioblastoma.