Abstract
Survival and differentiation of oligodendrocytes are important for the myelination of central nervous system (CNS) axons during development and crucial for myelin repair in CNS demyelinating diseases such as multiple sclerosis. Here we show that death receptor 6 (DR6) is a negative regulator of oligodendrocyte maturation. DR6 is expressed strongly in immature oligodendrocytes and weakly in mature myelin basic protein (MBP)-positive oligodendrocytes. Overexpression of DR6 in oligodendrocytes leads to caspase 3 (casp3) activation and cell death. Attenuation of DR6 function leads to enhanced oligodendrocyte maturation, myelination and downregulation of casp3. Treatment with a DR6 antagonist antibody promotes remyelination in both lysolecithin-induced demyelination and experimental autoimmune encephalomyelitis (EAE) models. Consistent with the DR6 antagoinst antibody studies, DR6-null mice show enhanced remyelination in both demyelination models. These studies reveal a pivotal role for DR6 signaling in immature oligodendrocyte maturation and myelination that may provide new therapeutic avenues for the treatment of demyelination disorders such as multiple sclerosis.
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S.M. supervised all experiments and wrote the paper. X.L., Y.H., B.J., Z.S., W.Y., G.H., L.W. and B.J.G. performed experiments. K.R. and R.B.P. provided helpful discussions, and R.H.M. and R.B.P. revised the paper.
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Mi, S., Lee, X., Hu, Y. et al. Death receptor 6 negatively regulates oligodendrocyte survival, maturation and myelination. Nat Med 17, 816–821 (2011). https://doi.org/10.1038/nm.2373
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DOI: https://doi.org/10.1038/nm.2373
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