Hexa-BODIPY-cyclotriphosphazene based nanoparticle for NIR fluorescence/photoacoustic dual-modal imaging and photothermal cancer therapy

Biosens Bioelectron. 2022 Nov 15:216:114612. doi: 10.1016/j.bios.2022.114612. Epub 2022 Aug 2.

Abstract

Theranostic, which integrates the diagnosis and tumor treatment in tandem, is an emerging strategy in cancer treatment. Here, we report a novel and unique theranostic nanoparticle, HBCP NP, based on hexa-BODIPY cyclophosphazene (HBCP). Due to the unique bulky molecular structure of HBCP, this nanoparticle can simultaneously perform near-infrared (NIR) fluorescence imaging and photoacoustic imaging (PAI). Interestingly, since reactive oxygen species (ROS) generation of HBCP NPs is completely inhibited, 'safe' fluorescence imaging is possible without the risk of cell damage even under laser irradiation. Finally, NIR fluorescence imaging and PAI in 4T1 tumor-bearing mice demonstrated selective accumulation of HBCP NPs at tumor sites. In addition, HBCP NPs exhibited excellent photothermal effects under high-power laser irradiation, achieving effective tumor growth inhibition.

Keywords: Dual-modal imaging; NIR fluorescence Imaging; Photoacoustic imaging; Photothermal cancer therapy; Theragnostic nanoparticle.

MeSH terms

  • Animals
  • Biosensing Techniques*
  • Boron Compounds
  • Cell Line, Tumor
  • Hexosaminidase A
  • Mice
  • Nanoparticles* / chemistry
  • Neoplasms* / diagnostic imaging
  • Neoplasms* / drug therapy
  • Optical Imaging
  • Photoacoustic Techniques* / methods
  • Reactive Oxygen Species
  • Theranostic Nanomedicine / methods

Substances

  • 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene
  • Boron Compounds
  • Reactive Oxygen Species
  • Hexosaminidase A