新型和注射的化物纳米颗粒作为具有明显放射催化活性的放射敏感剂
Nikita A Pivovarov1, Danil D Kolmanovich1, Nikita N Chukavin1
1Institute of Theoretical and Experimental Biophysics of the Russian Academy of Sciences, Pushchino 142290, Russia.
Biomedicines
|July 29, 2025
概括
新型生物相容纳米粒子 (Gd0.7Ce0.2Tb0.1F3NP) 通过产生活性氧物种,改善瘤损伤和提供MRI对比度来增强放射治疗. 它们的放射催化活性显示出对癌症治疗的前景.
科学领域:
- 纳米医学是一种纳米医学.
- 辐射疗法 辐射疗法
- 生物材料是一种生物材料.
背景情况:
- 纳米辐射敏感剂为提高放射治疗期间瘤损伤精度提供了一个有希望的策略.
- 开发生物相容的治疗药物对向癌症治疗至关重要.
- 用和 (Gd0.7Ce0.2Tb0.1F3NP) 合的加多化纳米粒子正在研究它们的治疗潜力.
研究的目的:
- 开发和描述新型生物相容的Gd0.7Ce{0.2}Tb0.1F3纳米颗粒作为色剂.
- 评估这些纳米粒子的放射催化活性和MRI对比能力.
- 评估Gd0.7Ce0.2Tb0.1F3NP在癌细胞中的辐射敏感效果和潜在机制.
主要方法:
- 使用TEM,SEM,XRD,DLS,EDX,紫外线光谱和MRI放松试验,合成并对Gd0.7Ce0.2Tb0.1F3NP进行全面的物理化学表征.
- 在体外和体外细胞毒性评估以确定纳米粒子生物相容性.
- 通过将NP与X射线照射相结合,评估放射敏感活性,并分析线粒体膜潜力,活性氧物种 (ROS) 水平和MCF-7瘤细胞中亡的影响.
主要成果:
- Gd0.7Ce0.2Tb0.1F3NP在体外和体内表现出极好的生物相容性.
- 这些纳米粒子有效地积聚在MCF-7瘤细胞中.
- 用Gd0.7Ce0.2Tb0.1F3NP和X射线照射的联合治疗诱导了线粒体膜潜力的剂量依赖性下降,细胞内ROS显著增加,随后发生了亡.
结论:
- Gd0.7Ce0.2Tb0.1F3NP的放射敏感化作用归因于ROS的放射催化生成,超过了简单的物理剂量增强.
- 这些发现强调了理解分子机制对于有效的纳米辐射敏感剂开发和测试的重要性.
- Gd0.7Ce0.2Tb0.1F3NP显示显著的潜力作为theranostic代理提高放射治疗的结果.
关键词:
在X射线辐射照射过程中,是最常见的物质之一,是最常见的元素.化物化物是什么?卡多利尼姆 (gadolinium) 是一种电子产品.纳米颗粒是一种纳米粒子.质子束辐射辐射的辐射.放射性催化活动的放射性催化活性.无线电感应器 (Radiosensitizer) 是一种具有无线电感应力的装置.更多相关视频
相关概念视频
Modified-Release Drug Delivery Systems: Stimuli-Activated
Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also called...
Site-Targeted Drug Delivery Systems: Polymeric Carriers
Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
Microorganisms in Medicine and Therapeutics
Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.


