Polysilsesquioxane nanoparticles for triggered release of cisplatin and effective cancer chemoradiotherapy

• Published in: Nanomedicine 2015-01, Vol.11 (1), p.31-38
• Main Authors: Rocca, Joseph Della, PhD, Werner, Michael E., PhD, Kramer, Stephanie A., BS, Huxford-Phillips, Rachel C., BS, Sukumar, Rohit, BS, Cummings, Natalie D., BA, Vivero-Escoto, Juan L., PhD, Wang, Andrew Z., MD, Lin, Wenbin, PhD
• Format: Article
• Language: English
• Subjects: Animals; Antineoplastic Agents - administration & dosage; Antineoplastic Agents - chemistry; Cancer chemoradiotherapy; Carcinoma, Non-Small-Cell Lung - therapy; Cell Line, Tumor; Chemoradiotherapy - methods; Cisplatin; Cisplatin - administration & dosage; Cisplatin - chemistry; Delayed-Action Preparations; Disease Models, Animal; Dose-Response Relationship, Drug; HL-60 Cells; Humans; Hybrid nanomaterials; Hydrodynamics; Internal Medicine; Lung cancer; Lung Neoplasms - therapy; Mice; Microscopy, Electron, Scanning; Nanomedicine; Nanoparticles - chemistry; Organosilicon Compounds - chemistry; Polyethylene Glycols - chemistry; Polymers - chemistry; Polysilsesquioxane; Prodrugs - chemistry; Silica; Temperature
• ISSN: 1549-9634; 1549-9642
• DOI: 10.1016/j.nano.2014.07.004

Abstract Chemoradiotherapy is a well-established treatment paradigm in oncology. There has been strong interest in identifying strategies to further improve its therapeutic index. An innovative strategy is to utilize nanoparticle (NP) chemotherapeutics in chemoradiation. Since the most commonly utilized chemotherapeutic with radiotherapy is cisplatin, the development of an NP cisplatin for chemoradiotherapy has the highest potential impact on this treatment. Here, we report the development of an NP comprised of polysilsesquioxane (PSQ) polymer crosslinked by a cisplatin prodrug (Cisplatin-PSQ) and its utilization in chemoradiotherapy using non-small cell lung cancer as a disease model. Cisplatin-PSQ NP has an exceptionally high loading of cisplatin. Cisplatin-PSQ NPs were evaluated in chemoradiotherapy in vitro and in vivo. They demonstrated significantly higher therapeutic efficacy when compared to cisplatin. These results suggest that the Cisplatin-PSQ NP holds potential for clinical translation in chemoradiotherapy. From the Clinical Editor These authors present an innovative strategy utilizing the presence of platinum in nanoparticle chemotherapeutics for chemoradiation, demonstrating its efficacy in a non-small cell lung cancer model.