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深圳大学 | 精准杀瘤!新型纳米探针实现鼻咽癌光热 - 光动力协同治疗 + 免疫激活

  • 2026-06-05 19:34:03
深圳大学 | 精准杀瘤!新型纳米探针实现鼻咽癌光热 - 光动力协同治疗 + 免疫激活

概述

本研究针对鼻咽癌传统治疗创伤大、易转移、疗效有限等临床痛点,设计构建哑铃结构等离子体增强光学纳米探针,以介孔二氧化硅包裹金纳米棒为等离子体核心,负载稀土掺杂氧化钆纳米晶与光敏剂吲哚菁绿,并修饰鼻咽癌靶向肽;利用金纳米棒局域表面等离子体共振效应产生强局域电场,同步提升近红外二区荧光、光声、磁共振多模态成像性能,强化光热转换与活性氧生成效率,通过重金属效应促进光敏剂系间窜越提升光动力效果;体外实验证实探针生物相容性好、靶向性强,808 nm 激光下实现光热 - 光动力协同杀伤鼻咽癌细胞,体内实验实现肿瘤精准多模态成像引导下的协同治疗,显著抑制肿瘤生长、根除病灶并诱导免疫原性细胞死亡,降低转移复发风险,为鼻咽癌精准诊疗提供新型高效纳米平台与设计新思路。

注:该文章发表于《Advanced Science》,最新影响因子为14.1,位列JCR和中科院分区Q1/1区。

研究要点解析

1.研究亮点

构建哑铃型等离子体增强纳米探针,实现光 - 磁 - 声 - 热多模态成像与光热 - 光动力协同治疗;金纳米棒等离子体效应大幅提升光学与治疗性能,重金属效应强化光敏剂系间窜越;从物理与生物层面系统阐明协同机制,同时诱导免疫原性细胞死亡抑制肿瘤转移复发。

2.研究设计

采用种子生长法合成金纳米棒,通过溶胶 - 凝胶法在棒两端构建介孔二氧化硅,经超声纳米组装负载稀土掺杂氧化钆纳米晶,氨基化后共价连接吲哚菁绿与鼻咽癌靶向肽,制备哑铃型复合探针;利用 TEM、EDX、XPS 等表征结构与元素分布;通过 FDTD 模拟、量子力学计算解析局域电场增强与电子激发机制;体外以 CNE2、5-8F 鼻咽癌细胞评估摄取、生物相容性、活性氧生成、细胞毒性与协同杀伤效果;结合数学建模与蛋白质组学分析协同治疗机制;构建鼻咽癌异种移植小鼠模型,经尾静脉注射探针,开展近红外荧光、光声、磁共振多模态成像,实施 808 nm 激光治疗,监测肿瘤生长、体重、组织病理及免疫细胞与细胞因子水平,评估治疗与免疫激活效果。

3.结果解读

探针呈哑铃状,负载均匀、结构稳定,吸收峰调至 806 nm 匹配激光波长;金纳米棒局域电场显著增强稀土纳米晶近红外二区发光与光敏剂光动力性能,光热转换效率达 45.2%,磁共振弛豫性能优于临床造影剂,光声信号显著增强;量子计算表明金、钆重金属效应使自旋轨道耦合矩阵元提升 11157%,大幅促进系间窜越提升光动力效率;体外探针靶向进入癌细胞,激光下快速升温并产生活性氧,细胞死亡率达 85.7%,呈现强协同效应;体内实现肿瘤靶向富集与多模态成像,24 h 信号达峰值,激光照射后肿瘤温度快速升至 55℃以上;治疗后肿瘤完全根除、无复发,无明显系统毒性,同时诱导 CRT、HSP70、HMGB1 释放,促进树突状细胞成熟与 T 细胞活化,激活全身抗肿瘤免疫,抑制肿瘤转移。

Figure 1:该示意图清晰展示了哑铃型等离子体增强光学纳米探针的完整制备流程与功能提升机制,从金纳米棒逐步修饰介孔二氧化硅、负载稀土掺杂氧化钆纳米晶与吲哚菁绿、偶联鼻咽癌靶向肽,最终形成多功能探针,并阐明其在 808 nm 激光下通过局域电场增强实现多模态成像、光热 - 光动力协同治疗及诱导免疫原性细胞死亡的完整作用通路。

Figure 2:本组表征图系统验证了纳米探针的成功制备与结构稳定性,TEM 与 HR-TEM 显示稀土纳米晶尺寸均一、复合探针呈典型哑铃形貌,选区电子衍射证实晶体结构,EDX 能谱、线扫与元素 mapping 明确金、钆、硅、氧等元素均匀分布,XPS 表征确认各元素化学键合状态,全面证明探针结构规整、组分负载高效且结合稳定。

Figure 3:本组性能图系统验证了探针的光学与成像性能优势,吸收光谱显示探针吸收峰匹配 808 nm 激光,近红外二区荧光显著增强且荧光寿命长,光热转换效率达 45.2% 且循环稳定,光动力产生活性氧能力大幅提升,磁共振弛豫性能优于临床造影剂,光声信号随浓度增强,FDTD 模拟证实金纳米棒局域电场是性能提升的核心物理机制。

Figure 4:本组电子结构计算图从分子层面解析探针光动力增强机制,通过 ICG 分子构象筛选、吸收发射光谱拟合、态密度与分子轨道分析,明确金、钆引入改变电子激发类型,空穴 - 电子分布、电荷密度差与跃迁密度矩阵证实金属诱导电荷转移,自旋轨道耦合计算显示重金属效应使系间窜越效率提升万倍以上,揭示多通道系间窜越强化光动力效果的微观原理。

Figure 5:本组细胞实验图证实探针在鼻咽癌细胞中的优异靶向性与协同治疗效果,共聚焦成像显示探针可被 CNE2、5-8F 细胞高效摄取且定位于细胞质,激光照射下探针显著产生活性氧并快速升温,CCK-8 与活死染色结果表明光热 - 光动力协同杀伤率超 85%,远高于单一治疗,且探针本身无明显细胞毒性,生物相容性良好。

Figure 6:本组机制图从物理与生物层面阐明协同治疗原理,数学建模明确光热升温速率、活性氧生成速率、治疗相位差是影响协同效果的关键参数,等效线图证实显著协同作用,蛋白质组学揭示治疗引发内质网应激、氧化应激与 DNA 损伤,免疫原性细胞死亡标志物 CRT、HSP70、HMGB1 显著高表达,有效促进树突状细胞成熟激活免疫应答。

Figure 7:本组动物成像图验证探针在鼻咽癌荷瘤小鼠体内的多模态成像性能,近红外荧光成像显示探针 24 h 在肿瘤部位富集达峰值且持续 72 h,磁共振 T1 加权成像肿瘤信号显著增强,光声成像信号变化与荧光成像一致,红外热成像显示激光照射下肿瘤快速升温至 55℃以上,证明探针具备精准肿瘤靶向与多模态成像引导治疗能力。

Figure 8:本组动物治疗图证实探针在体内的优异治疗效果与免疫激活作用,单次激光治疗后肿瘤完全根除且无复发,小鼠体重无明显变化,组织切片显示肿瘤大量坏死、增殖停止、无新生血管,肺组织无转移灶,流式与 ELISA 检测证实治疗显著促进树突状细胞成熟、激活 CD8+ T 细胞,提升促炎因子水平,通过免疫原性细胞死亡实现抗肿瘤免疫与抑制转移。

4.结论

本研究成功开发哑铃结构等离子体增强光学纳米探针,整合多模态成像、光热 - 光动力协同治疗与免疫激活功能,可精准靶向鼻咽癌;金纳米棒等离子体共振效应与重金属效应协同提升探针成像与治疗性能,从物理、生物层面阐明性能增强与协同治疗机制;体内外实验证实探针生物相容性优异,在 808 nm 激光下实现鼻咽癌高效治疗,根除肿瘤并诱导免疫原性细胞死亡,降低转移与复发风险;该研究为高性能光诊疗纳米探针设计提供新策略,为鼻咽癌精准、微创、协同诊疗提供具有临床转化潜力的新方案。

局限性:仅在小鼠模型验证,未开展大动物与临床研究;长期生物安全性与代谢路径需深入评估。展望:推进探针工艺优化与安全性研究,开展临床前转化;拓展探针在其他头颈部肿瘤的诊疗应用,结合免疫治疗实现更高效肿瘤综合干预。

文章来自:Zhuang B, Yang Y, Han W, Tang Y, Yao C, Zhao F, Fang W, Li J, Huo X, An Y, Shao Y, Gao B, Yin J. Dumbbell-Structured Plasmonic-Enhanced Optical Nanoprobes Boosting Photo-Magnetic-Acoustic Multimodal Imaging-Guided Photodynamic-Photothermal Synergistic Treatment and Immunogenic Death in Nasopharyngeal Carcinoma. Adv Sci (Weinh). 2026 Apr 16:e75357. doi: 10.1002/advs.75357. Epub ahead of print. PMID: 41990258.

#鼻咽癌#纳米探针#光热治疗#光动力治疗#多模态成像#等离子体增强#免疫原性细胞死亡#金纳米棒

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  1. CONNECT:[ UseTime:0.001327s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001869s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000769s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000752s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001825s ]
  6. SELECT * FROM `set` [ RunTime:0.000618s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001936s ]
  8. SELECT * FROM `article` WHERE `id` = 608664 LIMIT 1 [ RunTime:0.018526s ]
  9. UPDATE `article` SET `lasttime` = 1780770849 WHERE `id` = 608664 [ RunTime:0.006303s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000848s ]
  11. SELECT * FROM `article` WHERE `id` < 608664 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001664s ]
  12. SELECT * FROM `article` WHERE `id` > 608664 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001265s ]
  13. SELECT * FROM `article` WHERE `id` < 608664 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003105s ]
  14. SELECT * FROM `article` WHERE `id` < 608664 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007286s ]
  15. SELECT * FROM `article` WHERE `id` < 608664 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004074s ]
0.217457s