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자료유형
학술저널
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저널정보
대한피부과학회 Annals of Dermatology Annals of Dermatology 제29권 제6호
발행연도
2017.1
수록면
715 - 721 (7page)

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Background: Hydroquinone (HQ) is frequently combined with retinoic acid (RA) to enhance lightening efficacy, which may also affect skin irritancy. Although skin irritation leads to postinflammatory hyperpigmentation, little research has been performed to compare skin irritancy between each component and the combination. Objective: This study was done to examine whether HQ-RA combination increased skin irritation induced by HQ or RA alone. Methods: Patch testing was performed using maximum therapeutic and higher concentrations of HQ and RA in 10 volunteers, and then, it was performed using their popular therapeutic concentrations and combination in the other 20 volunteers. In vitro irritation was also assessed in primary cultured normal human keratinocytes treated with 80% and 50% cell survival doses of HQ, 80% cell survival dose of RA, and their combination. Results: The combination in patch testing induced stronger erythema than the corresponding concentrations of HQ and RA, which was remarkable with use of combination of higher concentrations. In cultured keratinocytes, the RA combination significantly decreased cell viability, but increased cytotoxicity and extracellular interleukin 1 alpha release with corresponding doses of HQ. Conclusion: The results of patch tests and in vitro irritation assessment tests suggested that HQ and RA increased skin irritation when used in combination.

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