Mutant Huntingtin promotes autonomous microglia activation via myeloid lineage-determining factors.

Mutant Huntingtin promotes autonomous microglia activation via myeloid lineage-determining factors.
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DOI:
10.1038/nn.3668
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发表时间:
2014-04
影响因子:
25
通讯作者:
Glass, Christopher K.
Glass, Christopher K.
中科院分区:
医学1区
文献类型:
--
作者:
Crotti, Andrea;Benner, Christopher;Kerman, Bilal E.;Gosselin, David;Lagier-Tourenne, Clotilde;Zuccato, Chiara;Cattaneo, Elena;Gage, Fred H.;Cleveland, Don W.;Glass, Christopher K.

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Huntington’s Disease (HD) is a fatal neurodegenerative disorder caused by an extended polyglutamine repeat in the N-terminus of the Huntingtin protein (HTT). Reactive microglia and elevated cytokine levels are observed in the brains of HD patients, but the extent to which neuroinflammation results from extrinsic or cell-autonomous mechanisms within microglia is unknown. Using genome-wide approaches, we show that expression of mutant Huntingtin (mHTT) in microglia promotes cell-autonomous pro-inflammatory transcriptional activation by increasing the expression and transcriptional activities of the myeloid lineage-determining factors PU.1 and C/EBPs. Elevated levels of PU.1 and its target genes are observed in the brains of mouse models and HD individuals. Moreover, mutant Huntingtin-expressing microglia exhibit an increased capacity to induce neuronal death ex vivo and in vivo in the presence of sterile inflammation. These findings suggest a cell autonomous basis for enhanced microglia reactivity that may influence non-cell autonomous HD pathogenesis.
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