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Ultrastructural assessments of the melanosome distribution patterns and pigmentation features in human epidermal cells after UV irradiation and kojic acid treatment
International Journal of Cosmetic Science, 10/23/09
Vie K et al. – Results indicate that UV light did not change the number of melanosomes within either melanocytes or keratinocytes, but it definitely modified the distribution patterns of the pigment granules in both cell types. It also enhanced the pigmentation state of the epidermal cells. Moreover, statistical analysis concerning keratinocytes discloses a significant decrease in the mean pigmentation index when explants exposed to UV light were treated with kojic acid. Obviously, the present numerical findings point out the relevance of the introduced parameters to characterize the pigmentation state of skin.
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