4.7 Article

Malat-1-PRC2-EZH1 interaction supports adaptive oxidative stress dependent epigenome remodeling in skeletal myotubes

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CELL DEATH & DISEASE
卷 12, 期 10, 页码 -

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SPRINGERNATURE
DOI: 10.1038/s41419-021-04082-z

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  1. KAUST [BAS/1/1037-01-01]
  2. KAUST Competitive Research Grant Program
  3. KAUST Smart Health Initiative

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This study reveals the significant role of PRC2 and long non-coding RNAs in oxidative stress response, and identifies Malat-1 as the first lncRNA involved in PRC2-Ezh1 function.
PRC2-mediated epigenetic function involves the interaction with long non-coding RNAs (lncRNAs). Although the identity of some of these RNAs has been elucidated in the context of developmental programs, their counterparts in postmitotic adult tissue homeostasis remain uncharacterized. To this aim, we used terminally differentiated postmitotic skeletal muscle cells in which oxidative stress induces the dynamic activation of PRC2-Ezh1 through Embryonic Ectoderm Develpment (EED) shuttling to the nucleus. We identify lncRNA Malat-1 as a necessary partner for PRC2-Ezh1-dependent response to oxidative stress. We show that in this pathway, PRC2-EZH1 dynamic assembly, and in turn stress induced skeletal muscle targeted genes repression, depends specifically on Malat-1. Our study reports about PRC2-RNA interactions in the physiological context of adaptive oxidative stress response and identifies the first lncRNA involved in PRC2-Ezh1 function.

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