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3.
Dermatology ; 215(3): 173-9, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-17823511

RESUMO

BACKGROUND: The currently adopted method for predicting sun sensitivity is Fitzpatrick's classification which however is based on self-reported burning tendency and tanning ability. OBJECTIVE: Determination of the individual UV susceptibility based on non-subjective parameters. METHOD: Minimal erythema dose (MED), intensity and duration of pigmentation on days 5, 9 and 16 following 1 MED and the levels of the melanin marker pyrrole-2,3,5-tricarboxylic acid (PTCA) were analysed in non-red-haired subjects (50, aged 20-46 years). RESULTS: Phenotype groups or phototypes showed a good correlation with PTCA yields and the persistence of pigmentation on day 16, but not with MED values. MED values did not show a significant correlation with PTCA yields. On the other hand, high values on day 16 were exhibited only by subjects having PTCA values higher than 200 ng/mg. CONCLUSIONS: Measurement persistence of pigmentation on day 16 represents a non-invasive and easy-to-perform method to evaluate photoprotection in those individuals escaping straightforward classification based on phenotype or anamnesis.


Assuntos
Eritema/etiologia , Pigmentação da Pele/fisiologia , Pele/efeitos da radiação , Raios Ultravioleta/efeitos adversos , Adulto , Relação Dose-Resposta à Radiação , Feminino , Cabelo/química , Humanos , Masculino , Melaninas/análise , Pessoa de Meia-Idade , Tolerância a Radiação/fisiologia , Pigmentação da Pele/efeitos da radiação , Espectrofotometria , Fatores de Tempo
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