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- W2766846406 abstract "Accumulating evidence has described the involvement of mTORC1 signaling in pigmentation regulation; however, the precise mechanism is not fully understood. Here, we generated mice with conditional deletion of the mTORC1 suppressor Tsc2 in melanocytes. It resulted in constitutive hyperactivation of mTORC1 and reduced skin pigmentation. Mechanistically, neither the number of melanocytes nor the expression of melanogenesis-related enzymes was decreased; however, endoplasmic reticulum and mitochondrial oxidative stress and lower melanization in melanosomes were observed. By contrast, abrogation of mTORC1 by rapamycin completely reversed the reduced pigmentation, and alleviation of endoplasmic reticulum stress by SMER28 or 4-phenylbutyrate (PBA) or alleviation of mitochondrial oxidative stress by administration of adenosine triphosphate partially reversed the reduced pigmentation in these mice. In addition, we showed that these mechanisms were involved in reduced pigmentation of TSC2 small interfering RNA-transfected cultured human primary melanocytes and skin lesions of patients with the TSC gene mutation." @default.
- W2766846406 created "2017-11-10" @default.
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- W2766846406 date "2018-03-01" @default.
- W2766846406 modified "2023-10-17" @default.
- W2766846406 title "Uncoupling of ER/Mitochondrial Oxidative Stress in mTORC1 Hyperactivation-Associated Skin Hypopigmentation" @default.
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- W2766846406 doi "https://doi.org/10.1016/j.jid.2017.10.007" @default.
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