NRP2 and glioblastoma: miR-331-3p inhibits tumor growth, improves prognosis, and regulates the expression of NRP2, deoxyhypusine hydroxylase and the long non-coding RNA Hox transcript antisense intergenic RNA (HOTAIR) and human epithelial growth factor receptor 2 (HER2) in glioblastoma, prostate, and gastric cancers [25,26,27].