An RNA pull-down assay confirmed that Gm15290 could directly bind to miR-615–5 p, which inhibited the expression of miR-615–5 p, thus increasing the protein expression of miR-615–5 p target genes (insulin-like growth factor (IGF2), AKT serine/threonine kinase 2 (AKT2), and serine hydroxymethyltransferase 2 (SHMT2)), and promoted tumor cell proliferation. The gene discussed is IGF2; the disease is neoplasm.