ADCYAP1 and neuroblastoma: This is crucial because, for example, in NB cells, peptides control the expression of peptide receptors [16] and potentiate the effects mediated by other peptides [17]; some compounds favor the release of proliferative peptides and the expression of peptide receptors, as well as controlling the gene expression of peptides [43,44,52]; and peptides (PACAP) promote, after binding to their receptors, their own expression [118].