Clinical indocyanine green-based silk fibroin theranostic nanoprobes for in vivo NIR-I/II fluorescence imaging of cervical diseases

Nanomedicine. 2023 Jan:47:102615. doi: 10.1016/j.nano.2022.102615. Epub 2022 Oct 18.

Abstract

Cervical diseases such as lymph node disease and tubal obstruction have threatened women's health. However, the traditional diagnostic methods still have shortcomings. NIR-II fluorescence imaging with advantages of low scattering, negligible autofluorescence, and high spatial resolution could be an ideal option. To obtain high quality NIR-II fluorescence imaging, selecting appropriate nanoprobes becomes the important issue. As a small molecular photothermal agent, extensive applications of ICG are rather limited because of its drawbacks. Herein, natural silk fibroin (SF) was synthesized and encapsulated ICG molecules to form SF@ICG nanoparticles (NPs). After detailed analysis, SF@ICG NPs showed excellent stability and long circulation time, as well as strong NIR-II fluorescence emission, well photo-stability, biocompatibility and well photothermal property under 808 nm laser irradiation. Furthermore, SF@ICG NPs were utilized for NIR-II fluorescence imaging of lymph node/lymphangiography and angiography of fallopian tubes. The process of fallopian tubes could be detected with high resolution and high sensitivity.

Keywords: Indocyanine green; NIR-II fluorescence imaging; Salpingography; Sentinel lymph node; Silk fibroin nanoparticles.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Female
  • Fibroins*
  • Humans
  • Indocyanine Green*
  • Optical Imaging

Substances

  • Indocyanine Green
  • Fibroins