Feasibility of daylight-mediated photodynamic therapy for actinic keratosis throughout the year in Central and South America: a meteorological study

ABSTRACT: Background: Daylight-mediated photodynamic therapy (DL-PDT) is an efficacious treatment option for thin actinic keratosis (AK) that offers advantages over conventional PDT in terms of tolerability, treatment duration, and cost. A clinical study conducted in Australia determined the mean irradiance during a 2-hour exposure to be 305.8 W/m(2) (range: 40-585 W/m(2) ). The protoporphyrin IX light dose is influenced by latitude, weather conditions, and time of year. A recent study of meteorological data concluded that DL-PDT can be performed effectively throughout the year in Australia. Objectives: Based on the same hypothesis and applying the same methodology, the present study investigated the suitability of daylight to perform DL-PDT in Central and South America. Methods: Solar radiation and weather data were gathered and analyzed to assess daylight irradiance (light intensity) throughout a full year across 32 geographical locations in Central and South America. Results: The minimum average daily solar irradiance reported was above 305.8 W/m(2) in all locations investigated throughout the year. Annual averages of daily irradiance ranged from 578 W/m(2) in Chihuahua, Mexico, to 321 W/m(2) in Puerto Montt, Chile. Conclusions: Daylight-mediated PDT for AK can be performed effectively throughout the year in Central and South America given that weather conditions permit a comfortable 2-hour direct exposure to daylight.

• Autores: Sanclemente Mesa, Gloria; Grinblat, Beni; Galimberti, Gaston; Pantoja, Gonzalo; Alcala, Daniel; Torezan, Luís; Kerob, Delphine; Pascual, Thierry; Chouela, Edgardo
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2016
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/40316
• Acceso en línea: https://hdl.handle.net/10495/40316
• Palabra clave: Feasibility Studies; Estudios de Factibilidad; Keratosis, Actinic; Queratosis Actínica; Meteorology; Meteorología; Photosensitizing Agents; Fármacos Fotosensibilizantes; Sunlight; Luz Solar; Time Factors; Factores de Tiempo; https://id.nlm.nih.gov/mesh/D005240; https://id.nlm.nih.gov/mesh/D055623; https://id.nlm.nih.gov/mesh/D055904; https://id.nlm.nih.gov/mesh/D017319; https://id.nlm.nih.gov/mesh/D013472; https://id.nlm.nih.gov/mesh/D013997
• Rights: openAccess
• License: https://creativecommons.org/licenses/by/4.0/