多功能梭形 Fe3O4( @PDA纳米载体的制备与表征

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中图分类号:0648 文献标志码:A 文章编号:1671-5489(2025)05-1505-11

Preparation and Characterization of Multifunctional Spindle-Shaped Fe3O4@ PDA Nanocarriers

WANG Xiaohui1, LIU Jinglin1,DING Xin 1,2 ,HU Yanjun 2 (204号 (1. College of Chemistry and Materials Science, Inner Mongolia University for the Nationalities , Tongliao O28ooo, Inner Mongolia Autonomous Region , China; 2. Hubei Key Laboratory of Pollutant Analysis & Reuse Technology,College of Chemistry and Chemical Engineering,Hubei Normal University,Huangshi 4350o2,Hubei Province, China)

Abstract:Aiming at the common problem of low drug loading rate of polydopamine(PDA)-based nanocarriers, we synthesized Fe3O4@PDA nanoparticles (NPs) with a unique spindle-shaped structure, which could achieve a drug loading rate of up to , significantly surpassing traditional PDA-based carriers. The experimental results show that the spindle-shaped Fe3O4@PDA (2号 has good biocompatibility, efcient photothermal conversion ability, and excellent near-infrared (NIR) absorption ability,which can control drug release under pH/NIR dual response. Due to its embedded Fe3O4 ,spindle-shaped Fe3O4@ PDA NPs can be used as contrast agents for photoacoustic and magnetic resonance imaging,and for chemo-photothermal synergistic therapy guided by dualmodal imaging .

Keywords: polydopamine; polyethylene glycol modification; spindle-shaped nanocarrier

0引言

目前,肿瘤患者的化疗仍需提升疗效和降低不良反应[1-2],为此,研究人员提出了多种联合治疗策略以增强化疗效果并减少副作用,包括化疗与免疫疗法[3]、光动力疗法[4]和光热疗法(PTT)[5]的结合.PTT通过近红外(NIR)光辐照病灶部位,使光热转化剂产生热量精准杀死癌细胞,副作用极小,已成为联合治疗的理想选择[6],此外,NIR还可触发纳米粒子上负载的药物释放[7].因此,设计具有外部刺激响应功能的多功能纳米粒子,并将其与PTT结合,是一种极具前景的治疗策略.

聚多巴胺(PDA)作为新一代光热治疗剂的理想材料,因其良好的生物相容性、易于表面修饰以及高效的光热转换性能受到人们广泛关注[8」。(剩余14874字)

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