Abstract |
Photothermal therapy (PTT) is a promising approach for effective cancer treatment because of its non-invasive procedure, low toxicity to normal tissues, and high tumour ablation efficiency. Developing a PTT agent with precise tumour imaging capabilities is an essential prerequisite for effective PTT. In this study, we developed a bifunctional near-infra-red (NIR) fluorescent conjugate consisting of chitosan oligosaccharide lactate (COL) and the ZW800-1 NIR fluorophore (COL-ZW). We demonstrate that this conjugate is easy to use and that it is an effective theranostic agent for fluorescence-guided photothermal treatment. The temperature of COL-ZW increased by 62.3 °C after NIR laser irradiation (1.1 W/cm2) for 5 min in HT-29 tumour-bearing mice. The HT-29 tumours targeted by COL-ZW showed a remarkable decrease in tumour volume until a week after photothermal treatment. These in vivo results demonstrate that the bifunctional COL-ZW generates strong fluorescence and light-triggered PTT in tumour sites, indicating successful fluorescence-guided PTT. Importantly, no tumour recurrence or treatment-induced toxicity was observed after a single dose of COL-ZW with laser irradiation. Therefore, a combinatorial treatment with COL-ZW and NIR laser irradiation could serve as a promising strategy for photothermal cancer therapy.
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Authors | Sungsu Lee, Gayoung Jo, Jin Seok Jung, Dae Hyeok Yang, Hoon Hyun |
Journal | Artificial cells, nanomedicine, and biotechnology
(Artif Cells Nanomed Biotechnol)
Vol. 48
Issue 1
Pg. 1144-1152
(Dec 2020)
ISSN: 2169-141X [Electronic] England |
PMID | 32885672
(Publication Type: Journal Article)
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Chemical References |
- Fluorescent Dyes
- Oligosaccharides
- Lactic Acid
- Chitosan
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Topics |
- Animals
- Cell Line, Tumor
- Cell Transformation, Neoplastic
- Chitosan
(chemistry)
- Fluorescent Dyes
(chemistry)
- Humans
- Infrared Rays
- Lactic Acid
(chemistry)
- Mice
- Oligosaccharides
(chemistry)
- Optical Imaging
(methods)
- Phototherapy
(methods)
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