Abstract
A novel near-infrared (NIR) light-triggered smart nanoplatform has been developed for cancer targeting and imaging-guided combined photothermal-chemo treatment. Notably, Ag2S has a dual function of photothermal therapy and fluorescence imaging, which greatly simplifies the structure of the system. It can emit fluorescence at 820 nm under an excitation wavelength of 560 nm. The phase-change molecule of 1-tetradecanol (TD) is introduced as a temperature-sensitive gatekeeper to provide the nanocarrier with controlled release capability of doxorubicin (DOX). The nanocarrier (HAg2S@mSiO2-TD/DOX) shows a high drug loading capacity of 26.3% and exhibits an apparent NIR-responsive DOX release property. Under NIR irradiation, the photothermal effect of HAg2S nanocores facilitated the release of DOX through the melting of TD. The cytotoxicity test shows that the nanocarriers have good biocompatibility. As the same time, the synergistic combination leads to a better cancer inhibition effect than individual therapy alone in vitro. Cell uptake tests indicate that the carriers have excellent fluorescence imaging ability and high cellular uptake for HepG2 cells. This work provides a new strategy for the fabrication of smart nanocarriers with simple structures for fluorescence-mediated combination cancer therapy.
Graphical abstract
Fabrication of a smart drug delivery system based on hollow Ag2S@mSiO2 nanoparticles for fluorescence-guided synergistic photothermal chemotherapy
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Funding
This work received funding support from the National Natural Science Foundation of China (Grant No. U1604126) and the Key Scientific Research Project of Colleges and Universities in Henan Province (Grant No. 21A150014).
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Gao, M., Han, Z., Wang, Z. et al. Fabrication of a smart drug delivery system based on hollow Ag2S@mSiO2 nanoparticles for fluorescence-guided synergistic photothermal chemotherapy. Microchim Acta 189, 376 (2022). https://doi.org/10.1007/s00604-022-05468-2
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DOI: https://doi.org/10.1007/s00604-022-05468-2