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  • Title: Topical photodynamic therapy of murine non-melanoma skin carcinomas with aluminum phthalocyanine chloride and a diode laser: pharmacokinetics, tumor response and cosmetic outcomes.
    Author: Kyriazi M, Alexandratou E, Yova D, Rallis M, Trebst T.
    Journal: Photodermatol Photoimmunol Photomed; 2008 Apr; 24(2):87-94. PubMed ID: 18353089.
    Abstract:
    BACKGROUND/PURPOSE: Topical photodynamic therapy (PDT) is potentially useful for the treatment of non-melanoma skin cancer and other skin diseases. We investigated the therapeutic effects of PDT using topical application of aluminum phthalocyanine chloride (AlClPc) and a diode laser emitting at 670 nm in murine non-melanoma skin carcinomas. METHODS: AlClPc solution (0.7% w/v) was applied to tumors in mice for 1-6 h. The penetration depth and the optimum drug-light interval were assessed using pharmacokinetic studies. Then, PDT was performed on a murine model of non-melanoma skin cancer using seven different combinations of therapeutic parameters (fluence rate and energy dose). RESULTS: Pharmacokinetic studies revealed that AlClPc was absorbed 40 times more and penetrated 19 times deeper in tumors than normal skin. PDT using AlClPc (0.7% w/v) and a diode laser (75 mW/cm(2), 150 J/cm(2)) resulted in complete tumor remission in 60% of the mice, excellent cosmetic outcomes and growth retardation of tumors with partial remission. CONCLUSIONS: The results indicate that AlClPc-PDT is an effective treatment for non-melanoma skin carcinomas in experimental mouse models.
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