Fig. 7
From: Immune cells: potential carriers or agents for drug delivery to the central nervous system
The role of infiltrating immune cells in neurodegenerative diseases and their application or non-application in immune cell-based DDS, including AD (a), MS (b), and PD (c). AD Alzheimer’s disease, Aβ amyloid-β, BBB blood–brain barrier, CCL2 c–c motif chemokine ligand 2, DDS drug delivery systems, MS multiple sclerosis, PD Parkinson’s disease, ROS reactive oxygen species, TLR2 toll-like receptor 2. “?” represents no current application in DDS