Porous MnFeO-decorated PB Nanocomposites: a New Theranostic Agent for Boosted / MRI-guided Synergistic Photothermal/magnetic Hyperthermia

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 11

PMID 35541095

Authors

Xi Zhou

Xiaolin Lv

Wen Zhao

Tiantian Zhou

Shupeng Zhang

Zhan Shi

Shefang Ye

Lei Ren

Zhiwei Chen

Affiliations

Soon will be listed here.

Abstract

This study reports a multifunctional core/shell nanoparticle (NP) that can be used for amplified magnetic resonance image (MRI), enhanced photothermal therapy (PTT) and magnetic hyperthermia therapy (MHT) due to its surface coating with a porous shell. Importantly, by means of introducing the surface coating of a porous shell, it helps entrap large quantities of water around NPs and allow more efficient water exchange, leading to greatly improved MR contrast signals. Besides, the porous shell helps the near-infrared (NIR) absorbance of the core, and then the extremely enhanced thermal effect can be obtained under synergistic combination of PTT and MHT. By synthesizing multifunctional porous MnFeO/PB as an example, we found that the transversal relaxivity ( ) of MnFeO NPs might improve from 112.11 to 123.46 mM s, and the specific absorption rate (SAR) of MnFeO/PB nanoparticles reached unprecedented levels of up to 4800 W g compared with the SAR 1182 W g of PTT under an 808 nm laser and 180 W g of MHT under an external AC magnetic field. Meanwhile, when MnFeO was decorated on PB nanoparticles, the magnetic properties became lower slightly, but the synergistic photothermal/magnetic hyperthermia conversion was enhanced greatly. Subsequently, - dual-modal MRI, PTT and MHT results verified that MnFeO/PB could serve as an excellent MRI/PTT/MHT theranostic agent. Furthermore, the MnFeO/PB NPs were applied as a - dual-modal MRI, PTT and MHT theranostic agent for MRI-guided photothermal and magnetic hyperthermia ablation of tumors by intratumoral injection in 4T1 tumor-bearing mice. The - dual-modal MR imaging result shows a significantly contrast in the tumor site. The MPB-mediated PTT and MHT result shows high therapeutic efficiency as a result of high photothermal and magnetic hyperthermia conversion efficiency. The multifunctional NPs have a great potential application for future clinical tumorous diagnosis and treatment.

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