We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Smart Magnetic and Fluorogenic Photosensitizer Nanoassemblies Enable Redox‐Driven Disassembly for Photodynamic Therapy.
- Authors
An, Ruibing; Cheng, Xiaoyang; Wei, Shixuan; Hu, Yuxuan; Sun, Yidan; Huang, Zheng; Chen, Hong‐Yuan; Ye, Deju
- Abstract
Stimuli‐responsive smart photosensitizer (PS) nanoassemblies that allow enhanced delivery and controlled release of PSs are promising for imaging‐guided photodynamic therapy (PDT) of tumors. However, the lack of high‐sensitivity and spatial‐resolution signals and fast washout of released PSs from tumor tissues have impeded PDT efficacy in vivo. Herein, we report tumor targeting, redox‐responsive magnetic and fluorogenic PS nanoassemblies (NP‐RGD) synthesized via self‐assembly of a cRGD‐ and disulfide‐containing fluorogenic and paramagnetic small molecule (1‐RGD) for fluorescence/magnetic resonance bimodal imaging‐guided tumor PDT. NP‐RGD show high r1 relaxivity but quenched fluorescence and PDT activity; disulfide reduction by glutathione (GSH) promotes efficient disassembly into a small‐molecule probe (2‐RGD) and an organic PS (PPa‐SH), which could further bind with intracellular albumin, allowing prolonged retention and cascade activation of fluorescence and PDT to ablate tumors.
- Subjects
PHOTODYNAMIC therapy; PHOTOSENSITIZERS; GLUTATHIONE; SMALL molecules; MAGNETIC resonance; FLUORESCENCE
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 46, p20817
- ISSN
0044-8249
- Publication type
Academic Journal
- DOI
10.1002/ange.202009141