We identified 6 mature miRNAs, 44 C/D box, 2 H/ACA box snorRNAs, 5 antisense fragment and 5 misc-RNAs classes from the peripheral blood mononuclear cell (PBMC) from Relapsing-Remitting MS patients at the baseline and after 3 and 6 months IFN-β treatment. This evidence concerns the gene IFNB1 and myeloid sarcoma.