One-step reduction-encapsulated synthesis of Ag@polydopamine multicore-shell nanosystem for enhanced photoacoustic imaging and photothermal-chemodynamic cancer therapy  

作　　者：Xiao-Rui Li Baoli Yin Lei Gao Xinhao Li Hongwen Huang Guosheng Song Yi-Ge Zhou 

机构地区：[1]Institute of Chemical Biology and Nanomedicine,State Key Laboratory of Chemo/Biosensing and Chemometrics,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China [2]State Key Laboratory of Chemo/Biosensing and Chemometrics,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China [3]College of Materials Science and Engineering,Hunan University,Changsha 410082,China

出　　处：《Nano Research》2022年第9期8291-8303,共13页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21804036 and 21972039);the Science and Technology Project of Hunan Province(Nos.2020SK2014,2020RC3021,and 2020JJ3005).

摘　　要：Though imaging-guided multimodal therapy has been demonstrated as an effective strategy to improve cancer diagnosis and therapy,challenge remains as to simplify the sophisticated synthesis procedure for the corresponding nanoagents.Herein,an insitu one-step reduction-encapsulated method has been reported,for the first time,to synthesize multicore-shell polydopaminecoated Ag nanoparticles(AgNPs@PDA)as a cancer theranostic agent,integrating amplified photoacoustic imaging,enhanced photothermal therapy,and photothermal promoted dual tumor microenvironment-coactivated chemodynamic therapy.The photoacoustic signal and the photothermal conversion efficiency of AgNPs@PDA nanosystem present a 6.6-and 4.2-fold enhancement compared to those of M-AgNPs-PDA(simply mixing PDA and AgNPs)derived from the increased interface heat transfer coefficient and the stronger near-infrared absorption.Importantly,AgNPs@PDA coactivated by dual tumor microenvironment(TME)enables controllable long-term release of hydroxyl radicals(·OH)and toxic Ag+,which can be further promoted by near-infrared light irradiation.Moreover,the high efficiency of AgNPs@PDA nanosystem with prominent photoacoustic imaging-guided synergistic photothermal-chemodynamic cancer treatment is also found in in vitro and in vivo studies.As a special mention,the formation mechanism of the one-step synthesized multicore-shell nanomaterials is systematically investigated.This work provides a much simplified one-step synthesis method for the construction of a versatile nanoplatform for cancer theranostics with high efficacy.

关 键 词：one-step synthesis multicore-shell nanosystem photoacoustic imaging enhanced photothermal therapy dual tumor microenvironment-coactivated chemodynamic therapy 

分 类 号：R730.5[医药卫生—肿瘤] TB383[医药卫生—临床医学]