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• W2035788788 abstract "<h2>Abstract</h2><h3>Objective</h3> Talaporfin sodium (Laserphyrin^®, Meiji Seika, Tokyo, Japan) is a second-generation photosensitizer developed in Japan. It is characterized by both mild and short-term skin photosensitivity. The objective of this study was to evaluate the efficacy and the pharmacokinetic characteristics in tumor tissues in patients with head and neck cancer. <h3>Methods</h3> (1) Four hours after administration intravenous injection of talaporfin sodium (40mg/m²), 100mg tissue specimens were taken from the central part of the tumor. The samples were analyzed by reverse phase liquid chromatography and concentrations were measured. (2) Four hours after intravenous injection of talaporfin sodium (40mg/m²), we gave 60–150J/cm² of 664nm laser irradiation with a diode laser (PD laser, Panasonic, Japan). Biopsies were performed at 4 weeks and at 3 months after treatment and periodically thereafter to confirm the treatment efficacy of photodynamic therapy (PDT). <h3>Results</h3> Of the 14 patients who grope informed consent, more than 1μg/g of talaporfin sodium was found in the tumor tissues in 13. Moreover, in 9 patients, tumor-to-normal-tissue ratios ranged from 2.32:1 to 5.69:1, which indicates that more than double the amount of talaporfin sodium was maintained within the tumor than in normal tissues. We have enrolled 22 patients with head and neck cancer with no clinically recognizable metastases after obtaining written informed consent to participate in this study. PDT using talaporfin sodium exhibited the equivalent efficacy to that of conventional PDT using hematoporphyrin derivative (HpD). <h3>Conclusions</h3> The results using a combination of talaporfin sodium and PD laser achieved a primary treatment outcome equivalent to that of conventional PDT. This method has also proven to be advantageous because of the reduced incidence of side effects such as photosensitivity and local edema." @default.
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• W2035788788 date "2008-12-01" @default.
• W2035788788 modified "2023-10-18" @default.
• W2035788788 title "Therapeutic effects of a new photosensitizer for photodynamic therapy of early head and neck cancer in relation to tissue concentration" @default.
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• W2035788788 doi "https://doi.org/10.1016/j.anl.2007.10.008" @default.
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