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Ultraviolet radiation (UVR) enhances skin pigmentation, which involves the production of melanin by melanocytes and subsequent transfer to keratinocytes. In the epidermis, keratinocyte phagocytosis plays a pivotal role in the process of melanosome transfer to protect DNA of epidermal cells against damage from UVR. Previous research suggested that transient receptor potential channels ankyrin 1 (TRPA1) was required for UVR-induced early melanin synthesis in melanocytes. Currently, there is no evidence that supports the detailed mechanism of TRPA1 for UVR-induced phagocytosis by keratinocytes. Here, we investigated the effect and the possible mechanisms of TRPA1 on keratinocyte phagocytosis and skin pigmentation after UVR exposure.

UVR Promotes Keratinocyte Phagocytosis and Skin Pigmentation Through TRPA1 Channels