Injury-induced HDAC5 nuclear export is essential for axon regeneration.
Injury-induced HDAC5 nuclear export is essential for axon regeneration.
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DOI:
10.1016/j.cell.2013.10.004
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发表时间:
2013-11-07
期刊:
影响因子:
64.5
通讯作者:
Cavalli V
中科院分区:
文献类型:
--
作者:
Cho Y;Sloutsky R;Naegle KM;Cavalli V
Reactivation of a silent transcriptional program is a critical step in successful axon regeneration following injury. Yet how such program is unlocked after injury remains largely unexplored. We found that axon injury in peripheral sensory neurons elicits a back-propagating calcium wave that invades the soma and causes nuclear export of HDAC5 in a PKCµ–dependent manner. Injury-induced HDAC5 nuclear export enhances histone acetylation to activate a pro-regenerative gene expression program. HDAC5 nuclear export is required for axon regeneration, since expression of a nuclear-trapped HDAC5 mutant prevents axon regeneration, whereas enhancing HDAC5 nuclear export promotes axon regeneration in vitro and in vivo. Components of this HDAC5 pathway failed to be activated in a model of central nervous system injury. These studies reveal a signaling mechanism from the axon injury site to the soma that controls neuronal growth competence and suggest a role for HDAC5 as a transcriptional switch controlling axon regeneration.
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