Dual-response oxygen-generating MnO2 nanoparticles with polydopamine modification for combined photothermal-photodynamic therapy

Publication date: 1 June 2020Source: Chemical Engineering Journal, Volume 389Author(s): Weiwei Zeng, Hanjie Zhang, Yimin Deng, Aiting Jiang, Xiaoyan Bao, Minqi Guo, Zimu Li, Meiying Wu, Xiaoyuan Ji, Xiaowei Zeng, Lin MeiAbstractPhotonic therapy (e.g., photodynamic therapy (PDT) and photothermal therapy (PTT)), features easy handling, good targeting, high curative effect and lower side effects compared to other treatments, thus showing considerable potential in cancer treatment. However, adverse tumor microenvironment, low light conversion efficiency, and inherent toxicity of photonic agents limit their further application in clinic. In this work, hollow mesoporous MnO2 nanoparticles (NPs) loaded with photosensitizer chlorin e6 and coated with folic acid-functionalized polydopamine were fabricated, and used as a platform for photonic therapy. The NPs enabled accurately controlled drug release, and sustainable and extensive O2 production by reacting with endogenous H2O2 in vitro. In addition, the NPs allowed efficient NIR light-to-heat conversion, owing to the core-shell MnO2/polydopamine structure. With the synergy of folic acid mediated active targeting and enhanced permeability and retention effect mediated passive targeting, a pronounced NPs accumulation at the tumor sites of mouse model was observed. The NPs also exhibited excellent biodegradation properties, alleviating the possible concerns about the long-term safety of photonic agents. Finally, a combination of O2-stren...
Source: Chemical Engineering Journal - Category: Chemistry Source Type: research