在矩阵嵌入合金纳米集群中的协同效应:先进的I型光敏感剂用于theranostics
Negar Hosseiniyan1, Pietro Castronovo2,3, Gregory Beaune1
1Department of Applied Physics, Aalto University, P.O. Box 15100, FI-00076 Espoo, Finland.
ACS applied materials & interfaces
|January 28, 2026
概括
生物衍生纤维素纳米晶体支持的金纳米集群 (CNC-AuNCs) 为癌症治疗提供了一种新的方法. 这些生物相容的纳米材料有效地产生反应性氧物种用于光动力学疗法 (PDT) 在没有外部氧气的情况下,破坏癌细胞.
科学领域:
- 纳米医学是一种纳米医学.
- 生物医学工程 生物医学工程
- 材料科学 材料科学 材料科学
背景情况:
- 开发用于生物医学成像和光动力学疗法 (PDT) 的单一纳米材料对于纳米医学的进步至关重要.
- 目前的挑战包括在低氧瘤条件下有效的光敏化剂,具有高光稳定性,生物相容性,并允许清除.
- 超微金纳米集群 (AuNCs) 显示出作为成像,诊断和治疗的多功能平台的前景.
研究的目的:
- 开发和表征纤维素纳米晶体支的金纳米集群 (CNC-AuNCs) 以异原子替代为增强光动力学疗法.
- 研究这些新型纳米复合材料的光物理特性和反应性氧物种 (ROS) 生成能力.
- 评估CNC-AuNCs作为癌症治疗的治疗剂的潜力.
主要方法:
- 在生物衍生纤维素纳米晶体 (CNC) 上支持的原子精确超小 (<2 nm) 黄金纳米集群 (AuNC) 的合成.
- 在AuNCs的核心中加入单或多原子 (Ag,Pd,Pt).
- 描述CNC-AuNCs的光物理性质 (发射波长,量子产量,放松动力学) 和细胞吸收.
- 通过I型光动力学效应评估暴露于光的ROS生成和癌细胞破坏的评估.
主要成果:
- 合成的CNC-AuNCs表现出调制的发射波长和光发光量子产量,这是由于 heteroatom 替代.
- 这些纳米复合材料表现出高效的细胞透,细胞质积累和明亮的发光.
- 在暴露于光线下,CNC-AuNCs有效地产生了反应性氧物种 (ROS),包括O2-·和OH,通过I型光动力学效应导致癌细胞的完全破坏.
- 这些材料在有效的治疗度下显示出高生物相容性与最小的细胞毒性.
结论:
- 生物衍生纤维素纳米晶体支的黄金纳米集群与选择性的异原子替代代表一个有前途的平台为theranostic应用.
- 这些CNC-AuNC可以在低氧条件下高效地产生ROS,从而实现有效的I型光动力学治疗.
- 开发的纳米材料为创造具有临床转化潜力的强效PDT剂提供了一种多功能战略.
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