Clustering of the Neural Cell Adhesion Molecule (NCAM) at the Neuronal Cell Surface Induces Caspase-8- and -3-dependent Changes of the Spectrin Meshwork Required for NCAM-mediated Neurite Outgrowth*

Clustering of the Neural Cell Adhesion Molecule (NCAM) at the Neuronal Cell Surface Induces Caspase-8- and -3-dependent Changes of the Spectrin Meshwork Required for NCAM-mediated Neurite Outgrowth*
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神经细胞粘附分子 (NCAM) 在神经细胞表面的聚集会诱导 NCAM 介导的神经突生长所需的血影蛋白网络发生依赖于 Caspase-8 和 -3 的变化*

DOI:
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发表时间:
2010
影响因子:
4.8
通讯作者:
Iryna Leshchyns’ka
Iryna Leshchyns’ka
中科院分区:
生物学2区
文献类型:
--
作者:
Doreen Westphal;V. Sytnyk;M. Schachner;Iryna Leshchyns’ka

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神经元分化背后的神经元形态变化取决于生长中的神经突中快速且持续的细胞骨架重排。尽管细胞粘附分子已被广泛认为是神经元分化的调节剂,但人们对它们影响细胞骨架的信号传导机制知之甚少。在这里,我们表明,神经细胞粘附分子(NCAM)与 caspase-8 的活性形式相关,并且 NCAM 在神经元细胞表面的聚集导致 caspase-8 和 -3 的激活,随后裂解脑膜下血影蛋白网络,但不裂解肌动蛋白或微管蛋白细胞骨架。 caspase-8 和 -3 抑制剂特异性阻断 NCAM 依赖性血影蛋白裂解并消除 NCAM 依赖性神经突生长。因此,通过 caspase-8 依赖性 caspase-3 激活,膜相关血影蛋白网络的 NCAM 依赖性重排对于 NCAM 介导的神经突生长是必不可少的。
Changes in neuronal morphology underlying neuronal differentiation depend on rapid and sustained cytoskeleton rearrangements in the growing neurites. Whereas cell adhesion molecules are well established as regulators of neuronal differentiation, less is known about the signaling mechanisms by which they influence the cytoskeleton. Here we show that the neural cell adhesion molecule (NCAM) associates with the active form of caspase-8 and that clustering of NCAM at the neuronal cell surface leads to activation of caspase-8 and -3 followed by the cleavage of the sub-membranous brain spectrin meshwork, but not of the actin or tubulin cytoskeleton. Inhibitors of caspase-8 and -3 specifically block the NCAM-dependent spectrin cleavage and abolish NCAM-dependent neurite outgrowth. NCAM-dependent rearrangements of the membrane associated spectrin meshwork via caspase-8 dependent caspase-3 activation are thus indispensable for NCAM-mediated neurite outgrowth.
DOI: 10.1073/pnas.93.15.7464
发表时间: 1996-07-23
影响因子: 11.1
作者:
FernandesAlnemri, T;Armstrong, RC;Alnemri, ES
通讯作者: Alnemri, ES
DOI: 10.1016/s1097-2765(00)80095-7
发表时间: 1998-06-01
期刊: MOLECULAR CELL
影响因子: 16
作者:
Srinivasula, SM;Ahmad, M;Alnemri, ES
通讯作者: Alnemri, ES