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Simple ultraviolet and high-performance liquid chromatography methods for the evaluation of sunscreen efficacy.

Abstract：

BACKGROUND:To prevent DNA damage caused by the ultraviolet (UV) radiation of sunlight, sunscreens are commonly used to protect human skin. Current analysis of sunscreens' effectiveness is done through complicated procedures, including human exposure. OBJECTIVE:We sought to design a simple system using thymidine-thymidine (TT) dinucleotides to analyze the effectiveness of sunscreens. METHODS:We can directly analyze sunscreen effectiveness and the formation of TT photolesions simply by using UV spectrophotometry and high-performance liquid chromatography (HPLC). Efficient sunscreen has protective effects against UV irradiation damage. RESULTS:We have developed a simple method using TT dinucleotide, UV, and HPLC for the analysis of sunscreen effectiveness. Our research indicates that the analytical results from UV are consistent with those of HPLC, which is used to monitor the formation of the TT photolesions. Moreover, both UV and HPLC analyses indicate that TT dinucleotides are better protected against UV damage, using the sunscreens with higher UVB sun protection factor (SPF) value, and that sunscreens with higher SPF lead to reduced photolesion formation. Our UV and HPLC analyses confirm the SPF grading of commercial sunscreens. LIMITATIONS:In this experiment, only sunscreens were tested. The experiment, therefore, does not apply to other commercial products, such as cosmetic materials that claim UV protection as a secondary benefit. CONCLUSION:In conclusion, we have established a simple strategy to analyze the effectiveness of sunscreens and the quality of these potential cancer-preventive products.

journal_name

J Am Acad Dermatol

journal_title

Journal of the American Academy of Dermatology

authors

Maw KL,Caton-Williams J,Salon J,Huang Z

doi

10.1016/j.jaad.2010.05.038

subject

Has Abstract

pub_date

2011-08-01 00:00:00

pages

328-335

issue

2

eissn

0190-9622

issn

1097-6787

pii

S0190-9622(10)00631-6

journal_volume

65

pub_type

杂志文章

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