Neuronal structural remodeling: is it all about access?

Neuronal structural remodeling: is it all about access?
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DOI:
10.1016/j.conb.2010.06.002
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发表时间:
2010-10
影响因子:
5.7
通讯作者:
Nedivi E
Nedivi E
中科院分区:
医学2区
文献类型:
--
作者:
Chen JL;Nedivi E

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最近,稳定的标记技术和用于深层组织成像的双光子显微镜的使用使观察完整的大脑皮层回路中的神经元结构动力学成为可能。这些研究表明,虽然成人的神经元结构主要是稳定的,但一小部分树突和轴突是高度动态的,对经验有反应,具有精确的细胞类型和板层特异性的重塑。树突棘、树突分支和轴突重塑的定性和定量特征表明,它们的目的可能是提供进入皮质空间不同回路的通道,并改变它们之间的连接。在Arbor重塑过程中丢失或获得的突触的净数量可能不如突触伙伴的改组对电路图的改变那么重要。
Recently, stable labeling techniques and use of two-photon microscopy for deep tissue imaging have enabled observation of neuronal structural dynamics within intact cerebral cortical circuits. These studies demonstrate that while neuronal structures are predominantly stable in the adult, a fraction of dendrites and axons are highly dynamic and responsive to experience, remodeling with precise cell type and laminar specificity. The qualitative and quantitative features of dendritic spine, dendritic branch, and axonal remodeling suggest their purpose may be to provide access to and alter connectivity between different circuits in cortical space. The net number of synapses lost or gained during arbor remodeling may not be as important as the change to the circuit diagram resulting from the shuffling of synaptic partners.
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