Journal
NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE
Volume 44, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nano.2022.102574
Keywords
Nanotheranostic; Anticancer; NIR-II fluorescence imaging; Photothermal therapy
Funding
- National Key Research and Development Program of China [2020YFA0710700]
- National Natural Science Foundation of China [51873201, 82172071]
- Fundamental Research Funds for the CentralUniversities [YD2060002015]
- Key Research and Development Program of Anhui Province [202104b11020025]
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A novel NIR-II small-molecule organic fluorophore with strong electron-donating and accepting groups was synthesized and encapsulated into micelles. The resulting micelles showed excellent imaging performance and photothermal conversion efficiency, making it a promising platform for NIR-II imaging-guided photothermal therapy.
A novel NIR-II small-molecule D-A type organic fluorophore conjugation of triphenylamine, thiophene, and benzo[c,d] indol groups (TPA-Et) with strong electron-donating and accepting groups has been synthesized. The dye shows a significant Stokes shift for efficient fluorescence in the NIR-II region and high photothermal performance. The TPA-Et was then encapsulated by an amphiphilic copolymer P (OEGMA)20-P(Asp)14, and micelles (P@TP) has been prepared with outstanding NIR-II imaging performance, excellent photothermal conversion efficiency (52.5%) under 808 nm laser irradiation, and good photostability. Fluorescence imaging experiments have consistently shown that P@TP can image tiny blood vessels in mice, enrich effectively in the tumor region, and maintain a relatively stable NIR-II fluorescence signal in the tumor area for a long time up to 60 h. In vivo photothermal therapy has a highly significant anticancer effect without tumor recurrence, demonstrating the apparent advantages of P@TP as a NIR nanotheranostic platform in NIR-II imaging-guided photothermal therapy.(c) 2022 Elsevier Inc. All rights reserved.
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