中国组织工程研究 ›› 2025, Vol. 29 ›› Issue (16): 3400-3409.doi: 10.12307/2025.425

• 纳米生物材料 nanobiomaterials • 上一篇    下一篇

聚集诱导发光纳米探针在前列腺癌光热诊疗中的应用

桂  斌,姜  楠,黄  鑫,钟方璐,王治文,刘乾辉,郭宇昕,陈粤瑛,蒲  欢,邓  倾   

  1. 武汉大学人民医院超声影像科,湖北省武汉市   430060
  • 收稿日期:2024-02-27 接受日期:2024-04-19 出版日期:2025-06-08 发布日期:2024-09-03
  • 通讯作者: 邓倾,博士,副教授, 武汉大学人民医院超声影像科,湖北省武汉市 430060
  • 作者简介:桂斌,男,1998年生,江西省南昌市人,汉族,硕士,主要从事分子影像学方面的研究。
  • 基金资助:
    国家自然科学基金项目(81901759),项目负责人:邓倾;武汉大学人民医院交叉创新人才项目(JCRCFZ-2022-004),项目负责人:邓倾;国家自然科学基金项目(82102045),项目负责人:姜楠

Application of nanoprobe based on aggregation-induced luminescence in photothermal diagnosis and treatment of prostate cancer

Gui Bin, Jiang Nan, Huang Xin, Zhong Fanglu, Wang Zhiwen, Liu Qianhui, Guo Yuxin, Chen Yueying, Pu Huan, Deng Qing   

  1. Department of Ultrasound Imaging, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, China
  • Received:2024-02-27 Accepted:2024-04-19 Online:2025-06-08 Published:2024-09-03
  • Contact: Deng Qing, MD, Associate professor, Department of Ultrasound Imaging, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, China
  • About author:Gui Bin, Master, Department of Ultrasound Imaging, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, China
  • Supported by:
    National Natural Science Foundation of China, No. 81901759 (to DQ); Cross Innovation Talent Program of Renmin Hospital of Wuhan University, No. JCRCFZ-2022-004 (to DQ); National Natural Science Foundation of China, No. 82102045 (to JN)

摘要:

文题释义:
聚集诱导发光:是指某些物质在低浓度分散态时不产生荧光,而在高浓度聚集态时具有强荧光发射的现象。相对于传统荧光材料,具有聚集诱导发光特性的纳米材料不易淬灭,具有更好的荧光成像效果。
近红外二区荧光成像:近红外光是介于可见光和中红外光之间的电磁波,根据波长可分为近红外一区(650-900 nm)和近红外二区(900-1 700 nm)。除了具有一般光学成像技术灵敏度高、无创、实时成像等优点外,近红外二区荧光成像最突出的优点是空间分辨率高。

背景:基于“分子内运动受限”这一机制构筑的新型聚集诱导发光荧光探针可用于疾病标志物的检测、肿瘤诊断、细菌成像识别等多个方面。
目的:构建基于聚集诱导发光的近红外二区纳米探针FA-DSPE-PEG-AIE@NPs,探讨其用于前列腺癌靶向近红外二区荧光成像及光热治疗的潜能。
方法:以卵磷脂、聚乙二醇磷脂、叶酸-聚乙二醇磷脂、聚集诱导发光分子2TT-oC26B为原料,采用纳米沉淀法合成叶酸靶向纳米探针FA-DSPE-PEG-AIE@NPs,对其进行基本表征。选取PC3人前列腺癌细胞、人脐静脉内皮细胞为实验对象,检测纳米探针FA-DSPE-PEG-AIE@NPs的细胞毒性与光照毒性;选取PC3人前列腺癌细胞为实验对象,采用流式细胞术和钙黄绿素/碘化丙啶染色法检测该纳米探针的光热治疗效果。选取BALB/C裸鼠腹部皮下注射PC3人前列腺癌细胞建立肿瘤模型,尾静脉注射纳米探针FA-DSPE-PEG-AIE@NPs后立即对小鼠进行近红外二区荧光成像,12 h后激光照射肿瘤5 min,14 d内观察光热治疗效果。
结果与结论:①纳米探针FA-DSPE-PEG-AIE@NPs呈球形,平均粒径(171.0±0.3) nm,具有广谱光吸收能力和延伸至近红外二区的尾部发射,在激光辐照下可发出明亮的近红外二区荧光信号;②纳米探针FA-DSPE-PEG-AIE@NPs的细胞毒性低、光毒性高;流式细胞术及钙黄绿素/碘化丙啶染色法显示,纳米探针FA-DSPE-PEG-AIE@NPs对PC3人前列腺癌细胞具有明显的光热杀伤效果;③纳米探针FA-DSPE-PEG-AIE@NPs成功实现了对活体小鼠血管的近红外二区荧光成像,并确认了在肿瘤部位的最大富集时间为12 h,估算后肢腿部及腹部单根血管的血管宽度分别为0.63 mm和0.42 mm,治疗后14 d小鼠肿瘤体积明显减小;④结果表明,纳米探针FA-DSPE-PEG-AIE@NPs能有效实现前列腺癌的近红外二区荧光成像及光热治疗,有望为前列腺癌的早期诊断及联合治疗提供新手段。
https://orcid.org/0009-0003-6051-0299 (桂斌) 

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料;口腔生物材料;纳米材料;缓释材料;材料相容性;组织工程

关键词: 前列腺癌, 聚集诱导发光, 纳米探针, 近红外二区荧光成像, 光热治疗, 诊疗一体化

Abstract:

BACKGROUND: A novel aggregation induced luminescence fluorescence probe based on the mechanism of intramolecular motility restriction can be used for the detection of disease markers, tumor diagnosis, and bacterial imaging recognition.

OBJECTIVE: To prepare a near-infrared II nanoprobe called FA-DSPE-PEG-AIE@NPs based on aggregation-induced luminescence, and to explore its potential of targeted fluorescence imaging and photothermal therapy for prostate cancer. 

METHODS: Lecithin, polyethylene glycol phospholipids, folate polyethylene glycol phospholipids, and aggregation induced luminescent molecule 2TT-oC26B were used as raw materials. The folate-targeted nanoprobe FA-DSPE-PEG-AIE@NPs were prepared by nanoprecipitation method, and basic characterization of the nanoprobe was detected. PC3 human prostate cancer cells and human umbilical vein endothelial cells were selected as experimental objects. The cytotoxicity and phototoxicity of FA-DSPE-PEG-AIE@NPs were detected. PC3 human prostate cancer cells were selected as the experimental objects. Flow cytometry and calcein/propidium iodide staining were used to assess the efficacy of photothermal therapy. PC3 human prostate cancer cells were injected subcutaneously into the abdomen of BALB/C nude mice to establish a tumor model, and nanoprobes FA-DSPE-PEG-AIE@NPs were injected into the tail vein. The mice were immediately subjected to near-infraced II fluorescence imaging. 12 hours later, the tumor was irradiated by laser for 5 minutes, and the photothermal treatment effect was observed within 14 days. 
RESULTS AND CONCLUSION: (1) The nanoprobes FA-DSPE-PEG-AIE@NPs with a mean diameter of (171.0±0.3) nm showed a well-defined spherical morphology. The nanoprobe had a wide absorption spectrum and tail emission extending to the near-infrared II which emitted a bright near-infrared II fluorescence signal under laser irradiation. (2) The nanoprobes FA-DSPE-PEG-AIE@NPs had low cytotoxicity and high phototoxicity. The results of flow cytometry and calcein/propidium iodide staining showed that nanoprobes FA-DSPE-PEG-AIE@NPs had an obvious photothermal killing effect on human prostate cancer cells. (3) The nanoprobes FA-DSPE-PEG-AIE@NPs successfully achieved near-infrared II fluorescence imaging of mouse blood vessels and the maximum enrichment time of the tumor was 12 hours. The vessel widths of the hind leg and single blood vessels of abdomen were estimated to be 0.63 mm and 0.42 mm. The tumor volume of mice was significantly smaller after 14 days of treatment. (4) The results show that nanoprobes FA-DSPE-PEG-AIE@NPs can achieve near-infrared II fluorescence imaging and photothermal therapy of prostate cancer effectively, which may provide a new method for early diagnosis and combined treatment of prostate cancer. 

Key words: prostate cancer, aggregation-induced emission, nanoprobe, near-infrared II fluorescence imaging, photothermal therapy, theranostic

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