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- W4385422962 abstract "Head and neck squamous cell carcinoma (HNSCC) still represents the world’s sixth most common tumor entity, with increasing incidence. The reachability of light makes HNSCC suitable for light-based therapies such as Photochemical Internalization (PCI). The drug Bleomycin is cytotoxic and used as an anti-tumor medication. Since Bleomycin is endocytosed as a relatively large molecule, part of it is degraded in lysosomes before reaching its intracellular target. The goal of our study was to improve the intracellular availability of Bleomycin with PCI. We investigate the intracellular delivery of Bleomycin after PCI with the photosensitizer Fimaporfin. A systematic variation of Bleomycin and Fimaporfin concentrations and light irradiation led to the pronounced cell death of HNSCC cells. After optimization, the same level of tumor cell death of 75% was reached with a 20-fold lower Bleomycin concentration. This would allow treatment of HNSCC with high local tumor cell death and reduce the side effects of Bleomycin, e.g., lung fibrosis, at the same time. This demonstrates the increased efficacy of the anti-tumor medication Bleomycin in combination with PCI." @default.
- W4385422962 created "2023-08-01" @default.
- W4385422962 creator A5004508573 @default.
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- W4385422962 date "2023-07-28" @default.
- W4385422962 modified "2023-10-16" @default.
- W4385422962 title "Photochemical Internalization with Fimaporfin: Enhanced Bleomycin Treatment for Head and Neck Cancer" @default.
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- W4385422962 doi "https://doi.org/10.3390/pharmaceutics15082040" @default.
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