Significance of miR-885-5p in neuroblastoma outcome

Neuroblastoma is the most common extracranial malignant solid tumor in children. This disease displays a remarkable heterogeneity in clinical behavior, ranging from spontaneous regression to rapid progression and resistance to therapy. Recent evidence has shown that microRNAs are often involved in regulation of tumor development and progression. MiR-885-5p has a tumor suppressive role in neuroblastoma, interfering with cell cycle progression and cell survival. MiR-885-5p leads to the accumulation of p53 protein and activates p53-mediated pathway of cell cycle arrest, resulting in up -regulation of its targets. We have analyzed association of miR-885-5p expression in 58neuroblastoma tumors with different clinical characteristics and disease outcome. In tumor samples of patients with unfavorable clinical characteristics lower miR-885-5p expression levels were observed. Event-free survival analysis showed that low miR-885-5p expression was tightly associated with a significantly poorer outcome than in those with high expression of miR-885-5p. In this study, evidence is presented on miR- 885-5p dysregulation in neuroblastoma. As follows, along with other clinical features, it can be used as an independent prognostic and possibly therapeutic approach for optimization of neuroblastoma treatment