A particle composition comprising a graft copolymer formed from a biocompatible polymer and a plurality of polyamine moieties, wherein the polyamine moieties are bound to the biocompatible polymer, and a combinatorial delivery polymer comprising a plurality of particles that comprises a graft copolymer of formed from a biocompatible polymer and a plurality of polyamine moieties, wherein the polyamine moieties are bound to the biocompatible polymer, a plurality of nucleic acids electrostatically loaded onto the particles, a plurality of chemokine molecules, and a biodegradable polymer network, in which the loaded particles and chemokine molecules may be entrapped, are disclosed. Also disclosed is a method for treating a subject comprising administering a therapeutically effective dose of a pharmaceutical composition, the pharmaceutical composition comprising a particle composition that comprises a graft copolymer formed from a biocompatible polymer and a plurality of polyamine moieties, wherein the polyamine moieties are bound to the biocompatible polymer.