FUS and amyotrophic lateral sclerosis: To further specify TDP-43 binding miRNAs in ALS we took advantage of lymphoblastoid cell lines (LCLs) generated from healthy controls, SALS patients and genetically defined ALS patients carrying mutations in the genes coding for TDP-43, FUS, SOD1 or the hexanucleotide expansion in C9ORF72. Although it is known that immortalization of lymphocytes by EBV transformation is accompanied by specific epigenetic changes, e.g. the regulation of miR-155, the vast majority of miRNAs are most likely not contributing to the transformation process [22,23].