Upregulation of miR-378a-5p in M14 melanoma cells reduced both mRNA (Supplementary Fig. 1a) and protein (Supplementary Fig. 1b) levels of STAMBP, SP1, KLF9, FUS-1, and SUFU when compared with control transfected cells, while miR-378a-5p inhibition led to an opposite effect, upregulating the expression of target genes (Supplementary Fig. 1c). Here, SP1 is linked to melanoma.