title: Immuno gold nanocages with tailored optical properties for targeted photothermal destruction of cancer cells.
abstract: Gold nanocages with a relatively small size (e.g., approximately 45 nm in edge length) have been developed, and the structure of these nanocages was tailored to achieve strong absorption in the near-infrared (NIR) region for photothermal cancer treatment. Numerical calculations show that the nanocage has a large absorption cross section of 3.48 x 10(-14) m(2), facilitating conversion of NIR irradiation into heat. The gold nanocages were conjugated with monoclonal antibodies (anti-HER2) to target epidermal growth factor receptors (EGFR) that are overexpressed on the surface of breast cancer cells (SK-BR-3). Our preliminary photothermal results show that the nanocages strongly absorb light in the NIR region with an intensity threshold of 1.5 W/cm(2) to induce thermal destruction to the cancer cells. In the intensity range of 1.5-4.7 W/cm(2), the circular area of damaged cells increased linearly with the irradiation power density. These results suggest that this new class of bioconjugated gold nanostructures, immuno gold nanocages, can potentially serve as an effective photothermal therapeutic agent for cancer treatment.
authors: Department of Chemistry, University of Washington, Seattle, Washington 98195, USA.
authors: Jingyi
authors: J
authors: Chen
authors: Danling
authors: D
authors: Wang
authors: Jiefeng
authors: J
authors: Xi
authors: Leslie
authors: L
authors: Au
authors: Andy
authors: A
authors: Siekkinen
authors: Addie
authors: A
authors: Warsen
authors: Zhi-Yuan
authors: ZY
authors: Li
authors: Hui
authors: H
authors: Zhang
authors: Younan
authors: Y
authors: Xia
authors: Xingde
authors: X
authors: Li
mesh_terms: D001943:Breast Neoplasms / Q000276:immunology / Q000378:metabolism / Q000473:pathology*; D045744:Cell Line, Tumor; D066246:ErbB Receptors / Q000276:immunology / Q000378:metabolism; D006046:Gold / Q000737:chemistry*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures; D055095:Optics and Photonics; D019265:Spectroscopy, Near-Infrared
chemical_list: D006046:Gold; D066246:ErbB Receptors