Acta Chimica Sinica ›› 2023, Vol. 81 ›› Issue (12): 1687-1694.DOI: 10.6023/A23060283 Previous Articles     Next Articles



黄艳琴a,*(), 栗丽君a, 杨书培a, 张瑞a,c,*(), 刘兴奋a, 范曲立a, 黄维a,b,*()   

  1. a 南京邮电大学 有机电子与信息显示国家重点实验室 信息材料与纳米技术研究院 南京 210023
    b 西北工业大学 柔性电子研究院 西安 710072
    c 东南大学附属中大医院 眼科 南京 210009
  • 投稿日期:2023-06-10 发布日期:2023-09-18
  • 基金资助:
    江苏高校优势学科建设工程资助项目(PAPD, YX03001); 先进生物与化学制造国家协同创新中心及有机电子与信息显示国家重点实验室开放研究基金资助课题资助

HA-AuNPs/FDF for Highly Sensitive Detection of Hyaluronidase, Tumor-targeting Fluorescence Cell Imaging and Phototherapy

Yanqin Huanga(), Lijun Lia, Shupei Yanga, Rui Zhanga,c(), Xingfen Liua, Quli Fana, Wei Huanga,b()   

  1. a State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing 210023, China.
    b Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), Xi'an 710072, China
    c Department of Ophthalmology, Zhongda Hospital, Southeast University, Nanjing 210009, China
  • Received:2023-06-10 Published:2023-09-18
  • Contact: *E-mail:;;
  • Supported by:
    Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD, YX03001); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), and the open research fund of State Key Laboratory of Organic Electronics and Information Displays

In this paper, a novel composite nano diagnostic and therapeutic agent HA-AuNPs/FDF was constructed for highly sensitive fluorescence detection of hyaluronidase (HAase), tumor-targeting fluorescence cell imaging and photodynamic/photothermal synergistic therapy. HA-AuNPs/FDF was formed by the electrostatic self-assembly of FDF, a diketopyrrolopyrrole-based conjugated small molecule, and HA-AuNPs, the gold nanoparticles functionalized with the tumor-targeting biomolecule hyaluronan (HA). FDF generated strong fluorescence under the excitation of near-infrared (NIR) light, and HA-AuNPs will quench the fluorescence of FDF through fluorescence resonance energy transfer (FRET). However, the overexpression of hyaluronidase (HAase) in tumor cells can gradually degrade HA, so FDF was released and the fluorescence of FDF was gradually recovered. Therefore, the fluorescence recovery of HA-AuNPs/FDF can be used for the rapid quantification of HAase. Experiments have shown that this method can achieve good linear response within the range of 0.25~2.25 U/mL with a detection limit of 0.04 U/mL. On this basis, after respective incubation with HA-AuNPs/FDF for 4 h, NIR fluorescence imaging was performed on human cervical cancer tumor cells (HeLa cells), HeLa cells pretreated with HA, and mouse embryonic fibroblasts (NIH-3T3 cells) to study the tumor-targeting capability of HA-AuNPs/FDF. In addition, after incubation with HA-AuNPs/FDF for 20 min, NIR fluorescence imaging was also performed on HeLa cells to detect the changes in fluorescence intensity over time and study the capability of HAase to activate fluorescence. All the results showed that HA-AuNPs/FDF was readily endocytosed by HeLa cells via the receptor CD44 and degraded by intracellular overexpressed HAase, and that it can be successfully used as a fluorescence probe activated by HAase for fluorescence cell imaging of HeLa cells. Furthermore, as FDF is a material with photothermal and photodynamic therapeutic potential, HA-AuNPs/FDF exhibited the single linear oxygen yield of 23.7%, with a photothermal conversion efficiency of 21.3% and good photothermal stability. The cytotoxicity of HA-AuNPs/FDF was measured by the 3-(4,5-dimethylthiazol-2-yl)-2,5- diphenyltetrazolium bromide (MTT) assay and live/dead cell staining experiments using calcein-acetoxymethyl ester (AM) and propidium iodide (PI) double staining kit. The results showed that the number of dead HeLa cells was significantly increased under laser irradiation as compared to that under dark conditions, confirming that HA-AuNPs/FDF can effectively inhibit the proliferation of HeLa cells by photodynamic/photothermal synergistic therapy. This system expands the ideas for achieving precise and efficient tumor diagnosis and therapy.

Key words: diketopyrrolopyrrole (DPP), nano diagnostic and therapeutic agent, hyaluronidase, fluorescence imaging, phototherapy