Cited by 123Nonmelanoma Skin Cancer StudiesPhotodynamic Therapy Research StudiesPorphyrin Metabolism and Disorders

Porphyrin formation in actinic keratosis and basal cell carcinoma after topical application of methyl 5-aminolevulinate

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Angell-Petersen, Even, Sørensen, Roar, Warloe, Trond, Soler, Ana Maria, Moan, Johan, Peng, Qian, Giercksky, Karl-Erik·2006·Journal of Investigative Dermatology

Abstract

Photodynamic therapy using topical methyl 5-aminolevulinate (MAL) is a new treatment modality for basal cell carcinoma (BCC) and actinic keratosis (AK). MAL induces endogenous porphyrins, which act as photosensitizers. Pharmacokinetic studies of the porphyrin-inducing effect of MAL creams (Metvix) applied in different concentrations (16-160 mg/g) and application times are presented. Surface fluorescence measurements were used to monitor porphyrin accumulation in 18 superficial BCCs and 32 AKs. For both lesion types, the fluorescence increased during the first 13 of 28 hours of continuous MAL application. A 20-fold site-to-site variation was observed, and there were no significant MAL concentration dependencies. The selectivity between lesions and normal skin was 10-fold during the first hours and decreased throughout the application time. Fluorescence microscopy images of tissue sections from 32 nodular BCCs were analyzed to calculate the porphyrin content in tumor tissue as a function of depth. Significant correlation to MAL concentration was seen within the tumors treated for 3 hours. Increase to 18-hour MAL application enhanced the fluorescence levels in superficial tumor layers, but not in deep layers. In conclusion, application of the 160 mg/g cream for 3 hours gave advantageous porphyrin distributions for all types of lesions.

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Crossref · 10.1038/sj.jid.5700048

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  • A 10-fold difference was observed between lesional skin and normal skin in the first hours after application of MAL.

    “A 10-fold difference was observed between lesional skin and normal skin in the first hours after application of MAL.”

    From Photodynamic Therapy for Non-Melanoma Skin Cancers (2016) · cites this paper as [18]

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  1. Rhodes LE, de Rie M, Enstrom Y, Groves R, Morken T, Goulden V et al. (2004) Photodynamic therapy using topical methyl aminolevulinate vs surgery 270 Journal of Investigative Dermatology (2006), Volume 126

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Authors
Angell-Petersen, E., Sørensen, R., Warloe, T., Soler, A. M., Moan, J., Peng, Q., & Giercksky, K.-E.
Venue
Journal of Investigative Dermatology
Publisher
Elsevier BV
Published
2006-02
Volume
126
Issue
2
Pages
265-271
ISSN
0022-202X (ISSN-L)
OpenAlex
W2135267652
Cited by
123
References
43
Citations by year
2024: 2 · 2023: 1 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 1 · 2018: 7 · 2017: 5 · 2016: 6 · 2015: 10 · 2014: 7 · 2013: 11 · 2012: 9
FWCI
6.93
Type
journal article
Language
en
Open access
Locations
  • Journal of Investigative Dermatology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Smith and Nephew
Topics
  • Health Sciences › Medicine › Epidemiology › Nonmelanoma Skin Cancer Studies
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Porphyrin Metabolism and Disorders
Keywords
porphyrin accumulation, actinic keratosis, basal cell carcinoma, photodynamic therapy, topical photosensitizer, skin fluorescence, nodular basal cell carcinoma, superficial basal cell carcinoma
MeSH terms
Administration, Topical, Aged, Aminolevulinic Acid, Basal Cell Carcinoma, Double-Blind Method, Female, Humans, Keratosis, Male, Microscopy, Fluorescence, Monitoring, Physiologic, Ointments, Photochemotherapy, Porphyrins, Prospective Studies, Skin Neoplasms, Photosensitizing Agents

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