The results of the KEGG pathway annotation showed that the target genes of ppy-miR-1, mmu-miR-200b-3p, novel miR-6, novel miR-94, and novel miR-10 were significantly annotated to “Ras signaling pathway”, “Neurotrophin signaling pathway”, “Glioma”, “Pathways in cancer”, and “Thyroid hormone signaling pathway” (p < 0.05), respectively. This evidence concerns the gene BDNF and cancer.