RAP1B and central nervous system cancer: To further explore the association between miR-28-5p and Rap1b in glioma cells, we analyzed the expression of the endogenous Rap1b after transiently transfecting cells with either (a) miR-28-5p mimics, (b) miR-28-5p inhibitor, or (c) control miR-28-5p-NC in A172, U87MG, U373MG, and SNB19 cells.