miR-362-5p inhibits proliferation and migration of neuroblastoma cells by targeting phosphatidylinositol 3-kinase-C2β.

miR-362-5p is down-regulated in high-risk neuroblastoma and can function as a tumor suppressor. However, its role remains poorly understood. We show that miR-362-5p is down-regulated in metastatic neuroblastoma compared with primary neuroblastoma. Overexpression of miR-362-5p inhibits cell proliferation, migration and invasion of neuroblastoma cells in vitro and suppresses tumor growth of neuroblastoma in vivo. Phosphatidylinositol 3-kinase (PI3K)-C2β is a target of miR-362-5p. Knockdown of PI3K-C2β by siRNA had a similar effect to overexpression of miR-362-5p on SH-SY5Y cells. Overexpression of PI3K-C2β partially reversed tumor-suppressive effects of miR-362-5p. We suggest that miR-362-5p suppresses neuroblastoma cell growth and motility, partially by targeting PI3K-C2β.