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Nicastrin Deficiency Induces Tyrosinase-Dependent Depigmentation and Skin Inflammation.

J Invest Dermatol. 2020 Feb;140(2):404-414.e13. Epub 2019 Aug 19
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摘要


Skin depigmentation diseases, such as vitiligo, are pigmentation disorders that often destroy melanocytes. However, their pathological mechanisms remain unclear, and therefore, promising treatments or prevention has been lacking. Here, we demonstrate that a zebrafish insertional mutant showing a significant reduction of nicastrin transcript possesses melanosome maturation defect, Tyrosinase-dependent mitochondrial swelling, and melanophore cell death. The depigmentation phenotypes are proven to be a result of γ-secretase inactivation. Furthermore, live imaging demonstrates that macrophages are recruited to and can phagocytose melanophore debris. Thus, we characterize a potential zebrafish depigmentation disease model, a nicastrinhi1384 mutant, which can be used for further treatment or drug development of diseases related to skin depigmentation and/or inflammation.

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