The dynamic cytoskeleton: backbone of dendritic spine plasticity.

The dynamic cytoskeleton: backbone of dendritic spine plasticity.
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DOI:
10.1016/j.conb.2010.08.013
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发表时间:
2011-02
影响因子:
5.7
通讯作者:
Hu X
Hu X
中科院分区:
医学2区
文献类型:
--
作者:
Dent EW;Merriam EB;Hu X

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树突棘是树突表面富含肌动蛋白的小突起,其形态和分子可塑性在学习和记忆中发挥着关键作用。棘的形式和功能都严重依赖于肌动蛋白细胞骨架。然而,使用电子显微镜和活细胞超分辨率显微镜的新研究表明,肌动蛋白细胞骨架比最初想象的更加复杂和动态。此外,几个实验室最近令人兴奋的研究表明,曾经被认为仅限于树突轴的微管可以移动到树突棘的最远端区域。此外,棘的微管入侵似乎与突触活动的变化有关。因此,树突棘内微管和肌动蛋白丝之间的动态相互作用很可能在树突棘可塑性中发挥重要作用。
Dendritic spines are small actin-rich protrusions on the surface of dendrites whose morphological and molecular plasticity play key roles in learning and memory. Both the form and function of spines are critically dependent on the actin cytoskeleton. However, new research, using electron microscopy and live-cell super-resolution microscopy indicates that the actin cytoskeleton is more complex and dynamic than originally thought. Also, exciting recent studies from several labs indicate that microtubules, once thought to be restricted to the dendrite shaft, can make excursions into the most distal regions of dendritic spines. Moreover, microtubule invasions of spines appear to be associated with changes in synaptic activity. Thus, it is likely that dynamic interactions between microtubules and actin filaments within dendritic spines play important roles in dendritic spine plasticity.
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