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- W2006381387 abstract "Skin color results from the production and distribution of melanin in the epidermis. The protease‐activated receptor‐2 (PAR‐2), expressed on keratinocytes but not on melanocytes, is involved in melanosome uptake via phagocytosis, and modulation of PAR‐2 activation affects skin color. The pattern of melanosome distribution within the epidermis is skin color‐dependent. In vitro, this distribution pattern is regulated by the ethnic origin of the keratinocytes, not the melanocytes. Therefore, we hypothesized that PAR‐2 may play a role in the modulation of pigmentation in a skin type‐dependent manner. We examined the expression of PAR‐2 and its activator, trypsin, in human skins with different pigmentary levels. Here we show that PAR‐2 and trypsin are expressed in higher levels, and are differentially localized in highly pigmented, relative to lightly pigmented skins. Moreover, highly pigmented skins exhibit an increase in PAR‐2‐specific protease cleavage ability. Microsphere phagocytosis was more efficient in keratinocytes from highly pigmented skins, and PAR‐2 induced phagocytosis resulted in more efficient microsphere ingestion and more compacted microsphere organization in dark skin‐derived keratinocytes. These results demonstrate that PAR‐2 expression and activity correlate with skin color, suggesting the involvement of PAR‐2 in ethnic skin color phenotypes." @default.
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- W2006381387 date "2004-05-11" @default.
- W2006381387 modified "2023-10-16" @default.
- W2006381387 title "The Expression and Activation of Protease-Activated Receptor-2 Correlate with Skin Color" @default.
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- W2006381387 doi "https://doi.org/10.1111/j.1600-0749.2004.00133.x" @default.
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