Scientific Publications

Targeted Tumor-Penetrating siRNA Nanocomplexes for Credentialing the Ovarian Cancer Oncogene ID4.

Publication TypeJournal Article
AuthorsRen, Y., Cheung HW, von Maltzhan G., Agrawal A., Cowley GS, Weir BA, Boehm JS, Tamayo P., Karst AM, Liu JF, Hirsch MS, Mesirov J. P., Drapkin R., Root DE, Lo J., Fogal V., Ruoslahti E., Hahn WC, and Bhatia SN
AbstractThe comprehensive characterization of a large number of cancer genomes will eventually lead to a compendium of genetic alterations in specific cancers. Unfortunately, the number and complexity of identified alterations complicate endeavors to identify biologically relevant mutations critical for tumor maintenance because many of these targets are not amenable to manipulation by small molecules or antibodies. RNA interference provides a direct way to study putative cancer targets; however, specific delivery of therapeutics to the tumor parenchyma remains an intractable problem. We describe a platform for the discovery and initial validation of cancer targets, composed of a systematic effort to identify amplified and essential genes in human cancer cell lines and tumors partnered with a novel modular delivery technology. We developed a tumor-penetrating nanocomplex (TPN) that comprised small interfering RNA (siRNA) complexed with a tandem tumor-penetrating and membrane-translocating peptide, which enabled the specific delivery of siRNA deep into the tumor parenchyma. We used TPN in vivo to evaluate inhibitor of DNA binding 4 (ID4) as a novel oncogene. Treatment of ovarian tumor-bearing mice with ID4-specific TPN suppressed growth of established tumors and significantly improved survival. These observations not only credential ID4 as an oncogene in 32% of high-grade ovarian cancers but also provide a framework for the identification, validation, and understanding of potential therapeutic cancer targets.
Year of Publication2012
JournalScience translational medicine
Volume4
Issue147
Pages147ra112
Date Published (YYYY/MM/DD)2012/08/15
ISSN Number1946-6234
DOI10.1126/scitranslmed.3003778
PubMedhttp://www.ncbi.nlm.nih.gov/pubmed/22896676?dopt=Abstract