Figure 1.
A schematic diagram depicting the efficiency of miR-214 inhibitor delivery into cells by means of graphene oxide (GO)-polyethyleneimine (PEI). GO was conjugated with PEI polymers to form positively charged GO-PEI complexes. Negatively charged miR-214 inhibitor was wrapped into the GO-PEI complexes by electrostatic interactions. GP-inhibitor complexes were delivered into the cytoplasm through endocytosis and inhibited the expression of miR-214 in osteosarcoma cells. Due to miR-214 inhibited by GP-inhibitor, the expression of PTEN could be increased and demonstrated a therapeutic effect in vitro. The GP-inhibitor also showed good therapeutic effect on the subcutaneous xenograft tumor mouse model through intratumoral injection.