PRMT5-mediated regulation of developmental myelination

PRMT5-mediated regulation of developmental myelination
PRMT5-mediated regulation of developmental myelination
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Nature Communications
Publication Date:
19 July 2018
Scaglione, A., Patzig, J., Liang, J. et al. PRMT5-mediated regulation of developmental myelination. Nat Commun 9, 2840 (2018).
Oligodendrocytes (OLs) are the myelin-forming cells of the central nervous system. They are derived from differentiation of oligodendrocyte progenitors through a process requiring cell cycle exit and histone modifications. Here we identify the histone arginine methyl-transferase PRMT5, a molecule catalyzing symmetric methylation of histone H4R3, as critical for developmental myelination. PRMT5 pharmacological inhibition, CRISPR/cas9 targeting, or genetic ablation decrease p53-dependent survival and impair differentiation without affecting proliferation. Conditional ablation of Prmt5 in progenitors results in hypomyelination, reduced survival and differentiation. Decreased histone H4R3 symmetric methylation is followed by increased nuclear acetylation of H4K5, and is rescued by pharmacological inhibition of histone acetyltransferases. Data obtained using purified histones further validate the results obtained in mice and in cultured oligodendrocyte progenitors. Together, these results identify PRMT5 as critical for oligodendrocyte differentiation and developmental myelination by modulating the cross-talk between histone arginine methylation and lysine acetylation.
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Funding Info:
Support for this project: NINDS grants R37-NS042925-18 to P. Casaccia and R01-NS052738-10 to P. Casaccia and P. Canoll; NCI/NIH R01CA154683 to E.B., NIH; NMSS Fellowship FG-1507-05262 to J.P.; A*STAR Fellowship to J.B. and A*STAR core funding to IMCB.
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