• T Dirschka, P Radny, R Dominicus, H Mensing, H Brüning, L Jenne, L Karl, M Sebastian, C Oster-Schmidt, W Klövekorn, U Reinhold, M Tanner, D Gröne, M Deichmann, M Simon, F Hübinger, G Hofbauer, G Krähn-Senftleben, F Borrosch, K Reich, C Berking, P Wolf, P Lehmann, M Moers-Carpi, H Hönigsmann, K Wernicke-Panten, S Hahn, G Pabst, D Voss, M Foguet, B Schmitz, H Lübbert, R-M Szeimies, AK-CT002 Study Group, and AK-CT003 Study Group.
• Private Dermatological Practice Centre, Wuppertal, Germany.
• Br. J. Dermatol. 2013 Apr 1; 168 (4): 825-36.

BackgroundTwo phase III trials of photodynamic therapy (PDT) with BF-200 ALA, a recently approved nanoemulsion formulation of 5-aminolaevulinic acid (ALA) demonstrated high clearance rates in mild-to-moderate actinic keratosis (AK). The comparison to a registered methyl aminolaevulinate (MAL) cream demonstrated significantly superior total patient clearance rates.ObjectivesTo evaluate long-term efficacy and safety of PDT for AK 6 and 12 months after the last PDT with BF-200 ALA, MAL or placebo.MethodsThe follow-up phase (FUP) was performed with patients of two phase III studies. Both studies compared BF-200 ALA with placebo, one of the studies additionally with MAL. Overall recurrence rates and various subgroups (light source, lesion severity, lesion location, complete responders after first PDT) were assessed 6 and 12 months after the last PDT.ResultsRecurrence rates were similar for BF-200 ALA and MAL, with a tendency to lower recurrence rates for BF-200 ALA. The proportion of patients who were fully cleared during PDT and remained completely clear for at least 12 months after PDT were 47% for BF-200 ALA (both studies) and 36% for MAL treatment. The subgroup that was illuminated with narrow wavelength LED lamps reached 69% and 53% for BF-200 ALA (both studies, respectively) and 41% for MAL. No safety concerns were reported.ConclusionsThe FUP data confirmed the high efficacy and safety of PDT with BF-200 ALA. The slightly lower recurrence rates after BF-200 ALA treatment compared with MAL treatment enhanced the better treatment outcome due to the significantly superior efficacy.© 2012 Biofrontera Bioscience GmbH BJD © 2012 British Association of Dermatologists.

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