This disclosure relates to nanoparticles carrying nucleic acid cassettes for expressing RNA. In certain embodiments, the disclosure relates to improved methods for targeted delivery and expression of siRNAs in vivo using DNA-based siRNA-expressing nanocassettes and receptor-targeted nanoparticles. In certain embodiments, the disclosure relates to methods of targeted delivery of survivin siRNA expressing nanocassettes which enhance sensitivity of human cancer cells to anticancer agents.
