Abstract: Provided herein are compositions that contain a nanoparticle containing a plurality of polymers, wherein at least a fraction of the polymers comprise a hydrophobic polymer, a topoisomerase inhibitor, and a Pt-containing chemotherapeutic agent, where the polymers self-assemble in an aqueous liquid to form the nanoparticle, and where the Pt-containing chemotherapeutic agent and the topoisomerase inhibitor are present within the hydrophobic core of the nanoparticle in a ratio of between about 24:1 to about 1:24. Also provided are methods of reducing the proliferation of a cancer cell and methods of treating cancer in a subject that include the use of these compositions. Also provided are methods of making these nanoparticles.

Abstract: Receptor-targeted nanoparticles (R-NPs) are provided for selective transport into and through targeted tissues of therapeutic, prophylactic and diagnostic agents. R-NPs can include polymeric particle, lipid particles, inorganic particles, or a combination thereof with a targeting moiety selective for binding to a receptor on the cells where the agent is to be delivered, where the receptor mediates transcytosis of the nanoparticle into and through the cells. In a preferred embodiment, the targeting moiety is the neonatal Fc receptor. Examples demonstrate Fc-targeted nanoparticles which are actively transported across the intestinal epithelium, providing a route for the oral delivery of nanoparticle encapsulated active agents including peptides such as insulin.

Abstract: Receptor-targeted nanoparticles (R-NPs) are provided for selective transport into and through targeted tissues of therapeutic, prophylactic and diagnostic agents. R-NPs can include polymeric particle, lipid particles, inorganic particles, or a combination thereof with a targeting moiety selective for binding to a receptor on the cells where the agent is to be delivered, where the receptor mediates transcytosis of the nanoparticle into and through the cells. In a preferred embodiment, the targeting moiety is the neonatal Fc receptor. Examples demonstrate Fc-targeted nanoparticles which are actively transported across the intestinal epithelium, providing a route for the oral delivery of nanoparticle encapsulated active agents including peptides such as insulin.

Abstract: Provided herein are compositions that contain a nanoparticle containing a plurality of polymers, wherein at least a fraction of the polymers comprise a hydrophobic polymer, a topoisomerase inhibitor, and a Pt-containing chemotherapeutic agent, where the polymers self-assemble in an aqueous liquid to form the nanoparticle, and where the Pt-containing chemotherapeutic agent and the topoisomerase inhibitor are present within the hydrophobic core of the nanoparticle in a ratio of between about 24:1 to about 1:24. Also provided are methods of reducing the proliferation of a cancer cell and methods of treating cancer in a subject that include the use of these compositions. Also provided are methods of making these nanoparticles.