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- W3184497017 abstract "In the past decades, polymer–drug conjugates of anticancer agents have gained much attention due to their enhanced aqueous solubility, improved pharmacokinetics, and better drug utilization than their conventional insoluble counterparts. Several polymer–drug conjugates have entered the third phase of clinical trials yet suffer from inherent deficiencies, including uncontrolled drug release and unclear degradation mechanisms. In this study, a pH/reactive oxygen species (ROS) dual-responsive PEG-doxorubicin (DOX) conjugate (denoted as TPD) was synthesized through acyl alkynyl-amine click reaction by PEG dipropiolate (PEGB), amine-terminated thioketal (TKL), and doxorubicin (DOX). Due to the generated ene-amine and thioketal in the backbone, the prepared amphiphilic TPD not only has a high drug loading ratio for photosensitizer chlorin e6 (Ce6) but also has the sensitivity to the acidic tumor microenvironment (TME) and ROS. Considering the complex conditions of TME, the prepared TPD@Ce6 nanoparticles (NPs) might respond to the relatively low pH and release Ce6 initially, and upon laser radiation, Ce6 produces abundant singlet oxygen (1O2) to achieve a programmable accelerated release of DOX and more Ce6 at the tumor site. In addition, the NIR fluorescence of DOX could monitor drug delivery and controlled release. The developed TPD@Ce6 NPs can realize the targeted tumor in combination therapy with negligible cytotoxicity on normal tissues." @default.
- W3184497017 created "2021-08-02" @default.
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- W3184497017 date "2021-07-20" @default.
- W3184497017 modified "2023-10-01" @default.
- W3184497017 title "pH/ROS Dual-Responsive Polymer–Drug-Based Nanocarriers: Click-Reaction Preparation and Fluorescence Imaging-Guided Chemotherapy and Photodynamic Therapy" @default.
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- W3184497017 doi "https://doi.org/10.1021/acsabm.1c00569" @default.
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