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- W2002246590 abstract "Photodynamic therapy (PDT) is a relatively new approach to the treatment of neoplasms which involves the use of photoactivatable compounds to selectively destroy tumors. 5-Aminolevulinic acid (ALA) is an endogenous substance which is converted to protoporphyrin IX (PpIX) in the synthetic pathway to heme. PpIX is a very effective photosensitizer. The goal of this study was to evaluate the effect of PDT using topical ALA on normal guinea pig (g.p.) skin and g.p. skin in which the stratum corneum was removed by being tape-stripped (TS). Evaluation consisted of gross examination, PpIX fluorescence detection, reflectance spectroscopy, and histology. There was no effect from the application of light or ALA alone. Normal non-TS g.p. skin treated with ALA and light was unaffected unless high light and ALA doses were used. Skin from which the stratum corneum was removed was highly sensitive to treatment with ALA and light: 24 h after treatment, the epidermis showed full thickness necrosis, followed by complete repair within 7 d. Time-dependent fluorescence excitation and emission spectra were determined to characterize the chromophore and to demonstrate a build-up of the porphyrin in the skin. These data support the view that PDT with topical ALA is a promising approach for the treatment of epidermal cutaneous disorders." @default.
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- W2002246590 date "1992-08-01" @default.
- W2002246590 modified "2023-10-16" @default.
- W2002246590 title "Effects of photodynamic therapy with topical application of 5-aminolevulinic acid on normal skin of hairless guinea pigs" @default.
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- W2002246590 doi "https://doi.org/10.1016/1011-1344(92)85128-h" @default.
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