Preparation of a near-infrared photoresponsive biomimetic nanoprobe and its application in photothermal detection and treatment of breast cancer

doi:10.12307/2023.983

Abstract

Abstract: BACKGROUND: Photothermal therapy is a novel tumor treatment strategy that uses photothermal agents to transform light energy into heat energy to accomplish non-invasive tumor ablation. The rise of photothermal therapy and nanotechnology has provided a new perspective on breast cancer treatment.
OBJECTIVE: To prepare a new type of near-infrared biomimetic nanoprobe that has been modified by breast cancer cell membrane, to investigate the effect of near-infrared fluorescence/ultrasound imaging in vitro, and to observe its targeting ability and photothermal therapy effect on homologous tumor cells in vitro.
METHODS: Organic small molecule ITIC-4CI with A-D-A structure was used as photothermal agents; polylactic acid/glycolic acid copolymer as nanocarrier; 4T1 cell membrane of mouse breast cancer cells as a surface modifier of nanoparticles; perfluorohexane (PFH) was loaded. A novel near-infrared biomimetic nanoprobe (4T1m/ITIC-4CI/PFH) was prepared by the double emulsion evaporation method and sonication method. The basic characterization of the nanoprobe and the homologous targeting ability were detected. The photothermal properties and photothermal stability of the probe were investigated, and the near-infrared fluorescence/ultrasound imaging effect of the probe under laser irradiation was observed. The CCK-8 assay and calcein/propidium iodide staining were used to assess the efficacy of photothermal therapy.
RESULTS AND CONCLUSION: (1) The prepared 4T1m/ITIC-4CI/PFH nanoprobes had uniform size, high stability, and an average particle size of (92.7±2.3) nm. The probe’s protein composition was identical to that of the 4T1 cell membrane. The nanoprobe’s ability to target homologous 4T1 cells was validated by an in vitro cell uptake assay. (2) The nanoprobe had a red-shift absorption spectrum and tail emission extending to the near-infrared-II, which emitted a bright near-infrared-II fluorescence signal under laser irradiation. (3) After laser irradiation, the nanoprobe 4T1m/ITIC-4CI/PFH could be turned into microbubbles and enhanced ultrasound imaging. The results of CCK-8 assay and calcein/propidium iodide staining showed that the nanoprobe 4T1m/ITIC-4CI/PFH had an obvious photothermal killing effect on 4T1 cells. (4) The results show that the nanoprobe 4T1m/ITIC-4CI/PFH has the ability to target homologous tumors and enhance near-infrared-II fluorescence imaging/ultrasound imaging and photothermal therapy effects.

Key words: cancer cell membrane, near-infrared fluorescence imaging, dual mude imaging, photothermal therapy, A-D-A structure, nanoprobe, nanotechnology

CLC Number:

Li Wenlan, Wang Wenyuan, Ren Wenxiu, Zhang Yupei, Yang Xiaoyan, Wang Zhigang, Xia Jizhu. Preparation of a near-infrared photoresponsive biomimetic nanoprobe and its application in photothermal detection and treatment of breast cancer[J]. Chinese Journal of Tissue Engineering Research, 2024, 28(5): 669-675.

Figures/Tables 7

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