Percutaneous absorption of the sunscreen benzophenone-3 after repeated whole-body applications, with and without ultraviolet irradiation

被引:130
作者
Gonzalez, H
Farbrot, A
Larkö, O
Wennberg, AM
机构
[1] Sahlgrenska Univ Hosp, Dept Dermatol & Venereol, S-41345 Gothenburg, Sweden
[2] Sahlgrenska Univ Hosp, Dept Clin Chem Transfus Med, S-41345 Gothenburg, Sweden
关键词
benzophenone-3; penetration; sunscreen; ultraviolet;
D O I
10.1111/j.1365-2133.2005.07007.x
中图分类号
R75 [皮肤病学与性病学];
学科分类号
100206 ;
摘要
Background Benzophenone-3 (BZ-3; 2-hydroxy-4-methoxybenzophenone, oxybenzone) is commonly used to absorb ultraviolet (UV) radiation. BZ-3 penetrates the skin and can be found in the urine. The amount varies between 0.4% and 2%. This seems to be the main metabolic pathway in rats. Objectives To investigate the total amount of BZ-3 excreted in the urine after repeated topical whole-body applications of a sunscreen and to see if UV radiation has any effect on the amount excreted. Methods Twenty-five volunteers applied a commercially available sunscreen containing 4% BZ-3 morning and night for 5 days. Their urine was measured during those 5 days and during a further 5 days after the last application. They were divided into groups A (unirradiated) and B. Group B received UV radiation according to skin type: UVA between 400 and 707 J cm(-2), and UVB between 0.46 and 2.0 J cm(-2). BZ-3 in urine was analysed with a high-performance liquid chromatography method. Results The volunteers excreted 1.2-8.7% (mean 3.7%) of the total amount of BZ-3 applied. There was no significant difference between the two groups (P < 0.99, t-test). Conclusions We show that a large amount of BZ-3 is absorbed. BZ-3 is accumulated in the body as the volunteers excreted BZ-3 5 days after the last application.
引用
收藏
页码:337 / 340
页数:4
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