Many naturally occurring cells possess an intrinsic ability to cross biological barriers that
block conventional drug delivery, and these cells offer a possible mode of active transport
across the blood–brain barrier or into the core of tumor masses. While many technologies for
the formation of complete, nanoparticle-loaded coatings on cells exist, a complete coating
on the cell surface would disrupt the interaction of cells with their environments. To address
this issue, cell surface patches that partially cover cell surfaces might provide a superior …