Jo, Seonyoung Lee, Hyeonhee Park, Ji Hwan Yang, Jin-Kyoung Lee, Won-jong Lim, Jongchul Kim, Sehoon Lee, Soojin Lee, Taek Seung 2024-01-19T08:33:54Z 2024-01-19T08:33:54Z 2023-10-14 2023-09 1944-8244 https://pubs.kist.re.kr/handle/201004/113299 To advance cancer treatment, we have developed a novel composite material consisting of conjugated polymer dots (CPDs) and Prussian blue (PB) particles, which were immobilized on, and encapsulated within, silica particles, respectively. The CPDs functioned as both a photosensitizer and a photodynamic agent, and the PB acted as a photothermal agent. The silica platform provided a biocompatible matrix that brought the two components into close proximity. Under laser irradiation, the fluorescence from the CPDs in the composite material enabled cell imaging and was subsequently converted to thermal energy by PB. This efficient energy transfer was accomplished because of the spectral overlap between the emission of donor CPDs and the absorbance of acceptor PB. The increase in local temperature in the cells resulted in a significant increase in the amount of reactive oxygen species (ROS) generated by CPDs, in which their independent use did not produce sufficient ROS for cancer cell treatment. To assess the impact of the enhanced ROS generation by the composite material, we conducted experiments using cancer cells under 532 nm laser irradiation. The results showed that with the increase in local temperature, the generated ROS increased by 30% compared with the control, which did not contain PB. When the silica-based composite material was positioned at the periphery of the tumor for 120 h, it led to a much slower tumor growth than other materials tested. By using a CPD-based photodynamic therapy platform, a new simplified approach to designing and preparing cancer treatments could be achieved, which included photothermal PB-assisted enhanced ROS generation using a single laser. This advancement opens up an exciting new opportunity for effective cancer treatment. English American Chemical Society Silica-Based Platform Decorated with Conjugated Polymer Dots and Prussian Blue for Improved Photodynamic Cancer Therapy Article 10.1021/acsami.3c08404 1 ACS Applied Materials & Interfaces, v.15, no.37, pp.43455 - 43467 ACS Applied Materials & Interfaces 15 37 43455 43467 N scie scopus 001065407800001 2-s2.0-85171900510 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article AGGREGATION-INDUCED EMISSION ENERGY-TRANSFER NANOPARTICLES PHOTOSENSITIZERS CHALLENGES SYSTEMS DESIGN conjugated polymer Prussian blue silica particle enhanced photodynamic cancer therapy photothermal effect