Acta Chimica Sinica ›› 2023, Vol. 81 ›› Issue (4): 359-370.DOI: 10.6023/A22120487 Previous Articles     Next Articles

Special Issue: 有机氟化学合集

Article

过氧化氢激活型近红外氟硼二吡咯光敏剂的设计、合成及光动力治疗研究

吕鑫, 吴仪, 张勃然, 郭炜*()   

  1. 山西大学 化学化工学院 太原 030000
  • 投稿日期:2022-12-04 发布日期:2023-03-09
  • 基金资助:
    国家自然科学基金(21778036); 国家自然科学基金(21877077)

Design, Synthesis and Photodynamic Therapy of a H2O2-Activatable Near Infrared Borondipyrromethene (BODIPY) Photosensitizer

Xin Lv, Yi Wu, Boran Zhang, Wei Guo*()   

  1. School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030000, China
  • Received:2022-12-04 Published:2023-03-09
  • Contact: * E-mail: guow@sxu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(21778036); National Natural Science Foundation of China(21877077)

In this work, a borondipyrromethene (BODIPY)-based activatable photosensitizer FP-IBDP was designed and synthesized, which has absorption and emission wavelengths in the near infrared (NIR) region. The maximum absorption and emission of FP-IBDP are 681 nm and 740 nm in acetonitrile. The fluorescence quantum yield and singlet oxygen yield of FP-IBDP is 0.01 and 0.09, respectively. After activated by H2O2, FP-IBDP was transformed to photosensitizer IBDP, which has maximum absorption and emission peak at 661 nm and 701 nm in acetonitrile. Compared with FP-IBDP, the fluorescence quantum yield and singlet oxygen yield of IBDP are much increased, up to 0.11 and 0.48 respectively. It is demonstrated that FP-IBDP can respond H2O2 sensitively in cancer cells and has the ability to distinguish cancer cells from normal cells by a fluorescence enhancement way. Reactive oxygen species (ROS) detection indicated that FP-IBDP could be activated by the endogenous H2O2 in cancer cells and produce highly toxic singlet oxygen under 660 nm light excitation with dichlorodihydrofluorescein diacetate (DCFH-DA) as ROS indicator. Tetrazolium (MTT) assay indicated that FP-IBDP has good biocompatibility and low dark toxicity to both cancer cells and normal cells, while phototoxicity test and living/dead cell double staining experiment proved that FP-IBDP has higher phototoxicity to cancer cells than to normal cells. Besides, wounding healing assay confirmed its good ability to inhibit cancer cell proliferation. Fluorescence localization and lysosome disruption assays further indicated that FP-IBDP was specifically located in lysosomes of living cells and the produced singlet oxygen could induce cancer cell death in a lysosome disruption associated pathway. These features are expected to lay good foundation for the application of FP-IBDP in imaging guided photodynamic therapy under NIR excitation.

Key words: activatable photosensitizer, near infrared light, borondipyrromethene (BODIPY) photosensitizer, photodynamic therapy, fluorescence imaging