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- W2975805875 abstract "Abstract The epidermis is the first line of defense against ultraviolet (UV) light from the sun. Keratinocytes and melanocytes respond to UV exposure by eliciting a tanning response dependent in part on paracrine signaling, but how keratinocyte:melanocyte communication is regulated during this response remains understudied. Here, we uncover a surprising new function for the keratinocyte‐specific cell–cell adhesion molecule desmoglein 1 (Dsg1) in regulating keratinocyte:melanocyte paracrine signaling to promote the tanning response in the absence of UV exposure. Melanocytes within Dsg1‐silenced human skin equivalents exhibited increased pigmentation and altered dendrite morphology, phenotypes which were confirmed in 2D culture using conditioned media from Dsg1‐silenced keratinocytes. Dsg1‐silenced keratinocytes increased melanocyte‐stimulating hormone precursor ( Pomc ) and cytokine mRNA. Melanocytes cultured in media conditioned by Dsg1‐silenced keratinocytes increased Mitf and Tyrp1 mRNA, TYRP1 protein, and melanin production and secretion. Melanocytes in Dsg1‐silenced skin equivalents mislocalized suprabasally, reminiscent of early melanoma pagetoid behavior. Together with our previous report that UV reduces Dsg1 expression, these data support a role for Dsg1 in controlling keratinocyte:melanocyte paracrine communication and raise the possibility that a Dsg1‐deficient niche contributes to pagetoid behavior, such as occurs in early melanoma development." @default.
- W2975805875 created "2019-10-03" @default.
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- W2975805875 date "2019-10-10" @default.
- W2975805875 modified "2023-10-17" @default.
- W2975805875 title "Keratinocyte cadherin desmoglein 1 controls melanocyte behavior through paracrine signaling" @default.
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- W2975805875 doi "https://doi.org/10.1111/pcmr.12826" @default.
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