Photoswitchable upconversion nanoparticles with excitation-dependent emission for programmed stepwise NIR phototherapy.
iScience
; 26(10): 107859, 2023 Oct 20.
Article
en En
| MEDLINE
| ID: mdl-37766981
ABSTRACT
Programmable control over therapeutic processes in phototherapy, like photodynamic therapy (PDT), is promising but challenging. This study uses an energy segmentation-based strategy to synthesize core-multi-shell upconversion nanoparticles (UCNPs), which can release three different colors (red, green, and blue) upon exposure to different near-infrared light (1550 nm, 808 nm, and 980 nm). By combining these UCNPs with photosensitizers and nitric oxide (NO) donors, a smart "off-on" PDT nanoplatform is developed. UCNPs enable independent activation of imaging, release of NO, and generation of reactive oxygen species using specific light wavelengths. The results show that sequential NO release before PDT can greatly alleviate tumor hypoxia by reducing oxygen consumption. This stepwise approach shows potential for precise NIR light-activated and imaging-guided phototherapy.
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Bases de datos:
MEDLINE
Idioma:
En
Revista:
IScience
Año:
2023
Tipo del documento:
Article
País de afiliación:
China