To strengthen the small RNA-seq data, four hemizygous FTSJ1 LCLs (control) and five LCL mutants for FTSJ1 were analysed by Northern blotting with a specific probe complementary to miRNA-181a-5p. We selected this miRNA as it was highly up-regulated in our small RNA-seq analysis and it was previously reported to be involved in vascular inflammation and atherosclerosis (Su et al, 2019), and expressed in neuronal cells in mammals (Dostie et al, 2003). Here, FTSJ1 is linked to atherosclerosis.