Combined Chemo-Photothermotherapy Using Gold Nanoshells on Drug-Loaded Micellar Templates for Colorectal Cancer Treatment
Journal
Particle and Particle Systems Characterization
Journal Volume
35
Journal Issue
12
Date Issued
2018
Author(s)
Abstract
Combined chemo-photothermotherapy is a novel strategy to improve the therapeutic outcome of cancer treatment by the synergistic effects of both photothermal therapy (PTT) and chemotherapy. Here, multifunctional gold nanoshells (GNS) that are synthesized using the 7-ethyl-10-hydroxycamptothecin (SN-38)-loaded micellar template are presented. The surface of positively charged SN-38-encapsulated poly[2-(N,N-dimethylamino)ethyl methacrylate]–poly(ε-caprolactone) (PDMA–PCL) micelles is decorated with a gold layer by in situ reduction of chloroauric acid (HAuCl4). The GNS display a broad surface plasmon resonance peak in the near-infrared (NIR) wavelength region and high photothermal conversion ability. After PEGylation, the GNS are stable in biological media and appear highly biocompatible. Upon NIR laser irradiation, the PEGylated gold nanoshells on SN-38-encapsulated micelles (SN-38@pGNS) convert incident energy to heat, which causes local temperature increase and facilitates the release of the encapsulated drug. Combined chemo-photothermotherapy using SN-38@pGNS with laser irradiation kills colorectal cancer cells with higher efficacy in vitro and demonstrates significant tumor suppression in vivo compared to using single therapy such as chemotherapy or PTT alone. This suggests that GNS on drug-loaded micelles deliver SN-38 and PTT synergistically and may be a potential candidate for future colorectal cancer therapy. ? 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Subjects
chemo-photothermotherapy; combined therapy; gold nanoshells; micelles; SN-38
SDGs
Other Subjects
Biocompatibility; Chemotherapy; Controlled drug delivery; Diseases; Gold; Infrared devices; Irradiation; Micelles; Nanostructured materials; Surface plasmon resonance; Targeted drug delivery; chemo-photothermotherapy; Colorectal cancer cell; Combined therapy; Gold nano-shells; Near-infrared wavelength; NIR laser irradiation; Photo-thermal conversions; Poly (epsiloncaprolactone); Nanoshells
Publisher
Wiley-VCH Verlag
Type
journal article