Issue 13, 2017

Photothermally induced accumulation and retention of polymeric nanoparticles in tumors for long-term fluorescence imaging

Abstract

The development of long-term tumor imaging is of great importance for effective theranostic systems. In this study, a temperature-responsive poly(ether amine) with a phase transition temperature around 43 °C was used to encapsulate indocyanine green (ICG), which is a near infrared fluorescent and photothermal agent. Upon photothermal treatment, the polymeric nanoparticles underwent an increase in size from the nano- to the microscale. The prepared ICG-loaded PEAs exhibited significant stability against photobleaching and excellent NIR imaging ability. The increase in particle size resulted in the accumulation and retention of nanoparticles at the tumor site upon photothermal treatment. The accumulation of nanoparticles facilitated long-term imaging of the tumor for up to 30 days after one injection. This study highlights the potential of the rational design of polymer nanoparticles for bioimaging and diagnostics.

Graphical abstract: Photothermally induced accumulation and retention of polymeric nanoparticles in tumors for long-term fluorescence imaging

Supplementary files

Article information

Article type
Paper
Submitted
11 Oct 2016
Accepted
05 Mar 2017
First published
06 Mar 2017

J. Mater. Chem. B, 2017,5, 2491-2499

Photothermally induced accumulation and retention of polymeric nanoparticles in tumors for long-term fluorescence imaging

H. He, X. Zheng, J. Zhang, S. Liu, X. Hu and Z. Xie, J. Mater. Chem. B, 2017, 5, 2491 DOI: 10.1039/C6TB02650H

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