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1 May 2006 Topical Bioadhesive Patch Systems Enhance Selectivity of Protoporphyrin IX Accumulation
Ryan F. Donnelly, Li-Wei Ma, Petras Juzenas, Vladimir Iani, Paul A. McCarron, A. David Woolfson, Johan Moan
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Abstract

In clinical 5-aminolevulinic acid (ALA)–based photodynamic therapy (PDT) of skin tumors it is desirable to develop vehicles that minimize the penetration of ALA through normal stratum corneum and maximize it through the compromised stratum corneum of the tumors to improve tumor selectivity. We have designed a bioadhesive patch, which may be able to achieve this aim. It induces levels of protoporphyrin IX (PpIX) in skin overlying tumors similar to those induced by the proprietary cream (Porphin®) but at the same time induces less PpIX to form in normal skin and at distant sites. The mechanisms of action of the patch, as compared with that of the cream, were studied by means of Cuprophan® barriers that mimic compromised tumor stratum corneum and in a mouse model with transplanted tumors.

Ryan F. Donnelly, Li-Wei Ma, Petras Juzenas, Vladimir Iani, Paul A. McCarron, A. David Woolfson, and Johan Moan "Topical Bioadhesive Patch Systems Enhance Selectivity of Protoporphyrin IX Accumulation," Photochemistry and Photobiology 82(3), 670-675, (1 May 2006). https://doi.org/10.1562/2005-08-08-RA-641
Received: 8 August 2005; Accepted: 1 February 2006; Published: 1 May 2006
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