2A-DUB/Mysm1 Regulates Epidermal Development in Part by Suppressing p53-Mediated Programs
AbstractDevelopment and homeostasis of the epidermis are governed by a complex network of sequence-specific transcription factors and epigenetic modifiers cooperatively regulating the subtle balance of progenitor cell self-renewal and terminal differentiation. To investigate the role of histone H2A deubiquitinase 2A-DUB/Mysm1 in the skin, we systematically analyzed expression, developmental functions, and potential interactions of this epigenetic regulator using Mysm1-deficient mice and skin-derived epidermal cells. Morphologically, skin of newborn and young adult Mysm1-deficient mice was atrophic with reduced thickness and cellularity of epidermis, dermis, and subcutis, in context with altered barrier function. Skin atrophy correlated with reduced proliferation rates in Mysm1−/− epidermis and hair follicles, and increased apoptosis compared with wild-type controls, along with increases in DNA-damage marker γH2AX. In accordance with diminished α6-Integrinhigh+CD34+ epidermal stem cells, reduced colony formation of Mysm1−/− epidermal progenitors was detectable in vitro. On the molecular level, we identified p53 as potential mediator of the defective Mysm1-deficient epidermal compartment, resulting in increased pro-apoptotic and anti-proliferative gene expression. In Mysm1−/−p53−/− double-deficient mice, significant recovery of skin atrophy was observed. Functional properties of Mysm1−/− developing epidermis were assessed by quantifying the transepidermal water loss. In summary, this investigation uncovers a role for 2A-DUB/Mysm1 in suppression of p53-mediated inhibitory programs during epidermal development. View Full-Text
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Wilms, C.; Krikki, I.; Hainzl, A.; Kilo, S.; Alupei, M.; Makrantonaki, E.; Wagner, M.; Kroeger, C.M.; Brinker, T.J.; Gatzka, M. 2A-DUB/Mysm1 Regulates Epidermal Development in Part by Suppressing p53-Mediated Programs. Int. J. Mol. Sci. 2018, 19, 687.
Wilms C, Krikki I, Hainzl A, Kilo S, Alupei M, Makrantonaki E, Wagner M, Kroeger CM, Brinker TJ, Gatzka M. 2A-DUB/Mysm1 Regulates Epidermal Development in Part by Suppressing p53-Mediated Programs. International Journal of Molecular Sciences. 2018; 19(3):687.Chicago/Turabian Style
Wilms, Christina; Krikki, Ioanna; Hainzl, Adelheid; Kilo, Sonja; Alupei, Marius; Makrantonaki, Evgenia; Wagner, Maximilian; Kroeger, Carsten M.; Brinker, Titus J.; Gatzka, Martina. 2018. "2A-DUB/Mysm1 Regulates Epidermal Development in Part by Suppressing p53-Mediated Programs." Int. J. Mol. Sci. 19, no. 3: 687.
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