Nanoparticles whose surface at least one signal molecule is associated, wherein the signal molecule with a transport molecule interacts, so that the nanoparticles (31, 31a) is directed transported by the transport molecule.
Nanoparticles (31, 31) whose surface at least one signal molecule (33, 33a) is associated, wherein the signal molecule (33, 33a) with a transport molecule (13, 13a, 13b) interacts, so that the nanoparticles (31, 31a) is directed transported by the transport molecule, characterized in that the transport molecule (13, 13a, 13b) is present ex vivo or in vitro.