
Keywords: دستگاه عصبی مرکزی; CNS; central nervous system; AD; Alzheimer's disease; PD; Parkinson's disease; SCI; spinal cord injury; BBB; blood-brain barrier; NPs; nanoparticles; FDA; food and drug administration; RES; reticuloendothelial system; PEG; polyethylene glycol; PLGA; p