2A-DUB/Mysm1 regulates epidermal development in part by suppressing p53-mediated programs
Development 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 deubiqui...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
28 February 2018
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| In: |
International journal of molecular sciences
Year: 2018, Volume: 19, Issue: 3 |
| ISSN: | 1422-0067 |
| DOI: | 10.3390/ijms19030687 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3390/ijms19030687 Verlag, lizenzpflichtig, Volltext: https://www.mdpi.com/1422-0067/19/3/687 
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| Author Notes: | Christina Wilms, Ioanna Krikki, Adelheid Hainzl, Sonja Kilo, Marius Alupei, Evgenia Makrantonaki, Maximilian Wagner, Carsten M. Kroeger, Titus Josef Brinker and Martina Gatzka |
| Summary: | Development 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. |
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| Item Description: | Gesehen am 26.03.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1422-0067 |
| DOI: | 10.3390/ijms19030687 |