Polycomb protein family member CBX7 regulates intrinsic axon growth and regeneration.

Polycomb protein family member CBX7 regulates intrinsic axon growth and regeneration.
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Polycomb 蛋白家族成员 CBX7 调节内在轴突生长和再生

DOI:
10.1038/s41418-018-0064-0
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发表时间:
2018-09
影响因子:
12.4
通讯作者:
Liu CM
Liu CM
中科院分区:
生物学1区
文献类型:
--
作者:
Duan RS;Tang GB;Du HZ;Hu YW;Liu PP;Xu YJ;Zeng YQ;Zhang SF;Wang RY;Teng ZQ;Liu CM

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中枢神经系统(CNS)中的神经元失去其内在能力并且不能再生,但其潜在机制在很大程度上是未知的。多梳族蛋白(Polycomb group,PcG)是一类基因阻遏蛋白,参与多种生物学过程。在这里,我们报告说,PRC1组件(多梳染色体盒(CBX)2,7和8)是轴突生长和再生的新调节剂。特别是,在胚胎皮层神经元或成年背根神经节(DRG)神经元中敲低CBX7增强其轴突生长能力。两个重要的转录因子GATA 4和SOX 11是CBX 7控制轴突再生的功能性下游靶点。此外,在培养的DRG神经元中敲低GATA 4或SOX 11抑制DRG神经元中CBX7下调引起的轴突再生反应。这些发现表明,针对CBX信号通路可能是促进受损CNS神经元内在再生能力的新方法。
Neurons in the central nervous system (CNS) lose their intrinsic ability and fail to regenerate, but the underlying mechanisms are largely unknown. Polycomb group (PcG) proteins, which include PRC1 and PRC2 complexes function as gene repressors and are involved in many biological processes. Here we report that PRC1 components (polycomb chromobox (CBX) 2, 7, and 8) are novel regulators of axon growth and regeneration. Especially, knockdown of CBX7 in either embryonic cortical neurons or adult dorsal root ganglion (DRG) neurons enhances their axon growth ability. Two important transcription factors GATA4 and SOX11 are functional downstream targets of CBX7 in controlling axon regeneration. Moreover, knockdown of GATA4 or SOX11 in cultured DRG neurons inhibits axon regeneration response from CBX7 downregulation in DRG neurons. These findings suggest that targeting CBX signaling pathway may be a novel approach for promoting the intrinsic regenerative capacity of damaged CNS neurons.
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