Realizing precise control of the therapeutic process is crucial for maximizing efficacy and minimizing side effects, especially for strategies involving gene therapy (GT). Herein, a multifunctional Prussian blue (PB) nanotheranostic platform is first designed and then loaded with therapeutic plasmid DNA (HSP70‐p53‐GFP) for near‐infrared (NIR) light‐triggered thermo‐controlled synergistic GT/photothermal therapy (PTT). Due to the unique structure of the PB nanocubes, the resulting PB@PEI/HSP70‐p53‐GFP nanoparticles (NPs) exhibit excellent photothermal properties and pronounced tumor‐contrast performance in T₁/T₂‐weighted magnetic resonance imaging. Both in vitro and in vivo studies demonstrate that mild NIR‐laser irradiation (≈41 °C) activates the HSP70 promoter for tumor suppressor p53‐dependent apoptosis, while strong NIR‐laser irradiation (≈50 °C) induces photothermal ablation for cellular dysregulation and necrosis. Significant synergistic efficacy can be achieved by adjusting the NIR‐laser irradiation (from ≈41 to ≈50 °C), compared to using GT or PTT alone. In addition, in vitro and in vivo toxicity studies demonstrate that PB@PEI/HSP70‐p53‐GFP NPs have good biocompatibility. Therefore, this work provides a promising theranostic approach for controlling combined GT and PTT via the heat‐shock response.

中文翻译：

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基于HSP70启动子的普鲁士蓝Nanotheranostics用于热控制基因治疗和协同光热消融。

实现治疗过程的精确控制对于最大化功效和最小化副作用至关重要，特别是对于涉及基因治疗（GT）的策略。本文首先设计了多功能的普鲁士蓝（PB）纳米热平台，然后装载了治疗性质粒DNA（HSP70-p53-GFP），用于近红外（NIR）光触发的热控协同GT /光热疗法（PTT）。由于PB纳米立方体的独特结构，所得的PB @ PEI / HSP70-p53-GFP纳米颗粒（NP）在T ₁ / T _2中表现出出色的光热性能和明显的肿瘤对比性能加权磁共振成像。体内外研究均表明，轻度NIR激光照射（≈41°C）激活HSP70启动子以抑制p53依赖的肿瘤细胞凋亡，而强NIR激光照射（≈50°C）诱导光热消融，引起细胞失调。和坏死。与单独使用GT或PTT相比，通过调节NIR激光辐射（从≈41到≈50°C）可以实现显着的协同功效。此外，体外和体内毒性研究表明PB @ PEI / HSP70-p53-GFP NP具有良好的生物相容性。因此，这项工作为通过热冲击响应控制GT和PTT结合提供了一种有前景的治疗方法。