In various embodiments tolerogenic nanoparticles are provided that induce
immune tolerance to one or more desired
antigen(s) and / or that reduce an immune response to those
antigen(s). In certain embodiments the tolerogenic
nanoparticle comprises a
nanoparticle comprising a biocompatible
polymer; an
antigen disposed within or attached to said biocompatible
polymer where said antigen comprises an antigen to which
immune tolerance is to be induced by administration of said tolerogenic
nanoparticle to a
mammal; and a first targeting
moiety that binds to a
scavenger receptor in the liver, and / or a second targeting
moiety that binds to a
mannose receptor in the liver, and / or a third targeting
moiety that binds to hepatocytes, wherein said first and / or second and / or third targeting moiety are attached to the surface of said nanoparticle.