Nanoparticles include a core and one or more targeting moieties, as well as one or more contrast agents or one or more therapeutic agents. The contrast agents or therapeutic agents may be contained or embedded within the core. If the nanoparticle includes therapeutic agents, the agents are preferably released from the core at a desired rate. The core may be biodegradable and may release the agents as the core is degraded or eroded. The targeting moieties preferably extend outwardly from the core so that they are available for interaction with cellular components, which interactions will target the nanoparticles to the appropriate cells, such as apoptotic cells organelles, such as mitochondria or the like. The targeting moieties may be tethered to the core or components that interact with the core.
