Of the 13 miRNAs, 3 miRNAs (miR-20a, miR-30b, and miR-30d) were particularly notable because: (1) they were significantly altered by 3 neurotoxicants; (2) 1 or more targets were specifically noted as potential biomarkers for various neurological diseases; and (3) several targets were linked to the TGF-β signaling pathway, a common pathway highlighted across our enrichment processes. This evidence concerns the gene TGFB1 and nervous system disorder.