Using gold-nanorod-filled mesoporous silica nanobeads for enhanced radiotherapy of oral squamous carcinoma

Mei Hsiu Chen, Ming Hong Chen, Chia Ying Li, Fu I. Tung, San Yuan Chen, Tse Ying Liu

Research output: Contribution to journalArticlepeer-review

Abstract

Radiotherapy (RT), in combination with surgery, is an essential treatment strategy for oral cancer. Although irradiation provides effective control over tumor growth, the surrounding normal tissues are almost inevitably affected. With further understanding of the molecular mechanisms involved in radiation response and recent advances in nanotechnology, using gold nanoparticles as a radiosensitizer provides the preferential sensitization of tumor cells to radiation and minimizes normal tissue damage. Herein, we developed gold nano-sesame-beads (GNSbs), a gold-nanorod-seeded mesoporous silica nanoparticle, as a novel radioenhancer to achieve radiotherapy with a higher therapeutic index. GNSbs in combination with 2 Gy irradiation effectively enhanced the cytotoxic activity CAL-27 cells. The well-designed structure of GNSbs showed preferential cellular uptake by CAL-27 cells at 24 h after incubation. Gold nanorods with high density modified on mesoporous silica nanoparticles resulted in significant reactive oxygen species (ROS) formation after irradiation exposure compared with irradiation alone. Furthermore, GNSbs and irradiation induced more prominent DNA double-strand breaks and G2/M phase arrest in CAL-27 than those in L929. In animal studies, radiotherapy using GNSbs as a radiosensitizer showed significant suppression of tumor growth in an orthotopic model of oral cancer. These results demonstrate that using GNSbs as a radiosensitizer could possess clinical potential for the treatment of oral squamous carcinoma.

Original languageEnglish
Article number2235
JournalNanomaterials
Volume11
Issue number9
DOIs
Publication statusPublished - Sep 2021

Keywords

  • Gold nanoparticles
  • Mesoporous silica
  • Oral cancer
  • Radiosensitizer
  • Radiotherapy

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Using gold-nanorod-filled mesoporous silica nanobeads for enhanced radiotherapy of oral squamous carcinoma'. Together they form a unique fingerprint.

Cite this