Recent developments in nanotechnology, especially in drug delivery systems, are advanced by featuring novel multifunctional nanoparticles that promise safe, specific, and efficient therapeutic delivery for cancer treatment. Multifunctional nanoparticle-based drug delivery systems enable simultaneous delivery of multiple therapeutic agents for effective combination therapy for cancer. In this chapter, we provide detailed protocols for development and application of a multifunctional nanoparticle system for combinatorial delivery of a chemotherapeutic (cisplatin) and small interfering RNA (siRNA) for human antigen R (HuR) mRNA in cancer cells using a polyamidoamine (PAMAM) dendrimer platform. Protocols for nanoparticle functionalization with folic acid (FA) for targeted delivery of therapeutics toward folate receptor (FR)-overexpressing cancer cells are also described. Further, methods employed for physiochemical and functional characterization of the multifunctional nanoparticle system are discussed in detail. Using the methods described in this chapter, researchers would be able to develop PAMAM dendrimer-based multifunctional nanoparticles for targeted delivery of chemotherapeutics and siRNA combinations. We also provide an example showing the dendrimer-polyethyleneimine-cis-diamminedichloroplatinum-siRNA-folic acid (Den-PEI-CDDP-siRNA-FA) nanoparticle system developed was therapeutically effective toward non-small cell lung cancer (NSCLC) cell lines (H1299 and A549) while exhibiting reduced toxicity to normal lung fibroblast (MRC9) cells.

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http://dx.doi.org/10.1007/978-1-4939-9220-1_20DOI Listing

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