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- Title
Disappointing results and low tolerability of photodynamic therapy with topical 5-aminolaevulinic acid in psoriasis. A randomized, double-blind phase I/II study.
- Authors
Schleyer, V.; Radakovic-Fijan, S.; Karrer, S.; Zwingers, T.; Tanew, A.; Landthaler, M.; Szeimies, R. M.
- Abstract
Background Based on good results in the treatment of superficial skin tumours, since the early 1990s topical photodynamic therapy with aminolaevulinic acid (ALA PDT) has been used for disseminated, inflammatory dermatoses including psoriasis. However, there is still a lack of well-documented trials. Objective A prospective randomized, double-blind phase I/II intrapatient comparison study was conducted in 12 patients to investigate whether topical ALA PDT is an effective treatment for chronic plaque-type psoriasis. Methods In each patient three psoriatic plaques were randomly treated with a light dose of 20 J/cm2 and 0.1%, 1% and 5% ALA, respectively. Treatment was conducted twice a week until complete clearance or for a maximum of 12 irradiations. Therapeutic efficacy was assessed by weekly determination of the psoriasis severity index (PSI). Results The mean percentage improvement was 37.5%, 45.6% and 51.2% in the 0.1%, 1% and 5% ALA-treated groups, respectively. Irradiation had to be interrupted several times because of severe burning and pain sensation. Conclusion Topical ALA PDT did not prove to be an appropriate treatment option for plaque-type psoriasis due to disappointing clinical efficacy, the time-consuming treatment procedure and its unfavourable adverse event profile.
- Subjects
SKIN tumors; PSORIASIS; PHOTOCHEMOTHERAPY; RANDOMIZED controlled trials; AUTOIMMUNE diseases; INTERLEUKIN-5; GROWTH factors
- Publication
Journal of the European Academy of Dermatology & Venereology, 2006, Vol 20, Issue 7, p823
- ISSN
0926-9959
- Publication type
Article
- DOI
10.1111/j.1468-3083.2006.01651.x