Abstract
Tumor microwave thermal therapy (MWTT) has attracted more attention because of the minimal damage to body function, convenient manipulation and low complications. Herein, a novel polydopamine (PDA) nanoparticle loading ionic liquids (ILs/PDA) as microwave susceptible agent is introduced for enhancing the selectivity and targeting of MWTT. ILs/PDA nanocomposites have an excellent microwave heating efficiency under an ultralow microwave power irradiation. Encouraging antitumor effect was observed when tumor bearing mice received ILs/PDA nanoparticles by intravenous injection and only single microwave irradiation. PDA nanoparticles with gold nanoparticles in core were constructed for tumor targeting study by ICP-MS and about 15% PDA nanoparticles were founded in tumor. Furthermore, the cytotoxicity and acute toxicity study in vivo of PDA showed the excellent biocompatibility of ILs/PDA nanocomposites. In addition, the degradation of ILs/PDA nanocomposites in simulated body fluid illustrated the low potential hazard when they entered the blood. The emergence of PDA as a novel and feasible platform for cancer thermal therapy will promote the rapid development of microwave therapy in clinics.
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