ELAVL1 and neuroblastoma: The effects of circAGO2 could also be repressed by blocking circAGO2 and HuR interaction through delivery of a HuR inhibitory peptide.87 In neuroblastoma (NB) tissue, circCUX1 was highly upregulated and promoted cell proliferation, migration, and invasion via sponging miR-16-5p.88 Delivery of circCUX1 shRNA reduced tumor growth in mice.