Epilepsy gene prickle ensures neuropil glial ensheathment through regulating cell adhesion molecules.

Epilepsy gene prickle ensures neuropil glial ensheathment through regulating cell adhesion molecules.
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癫痫基因刺通过调节细胞粘附分子确保神经胶质细胞鞘

DOI:
10.1016/j.isci.2022.105731
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发表时间:
2023-01-20
期刊:
影响因子:
5.8
通讯作者:
Li, Yan
Li, Yan
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Chen, Yanbo;Liu, Tong-Tong;Niu, Mengxia;Li, Xiaoting;Wang, Xinwei;Liu, Tong;Li, Yan

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人类PRICKLE 1基因与癫痫相关。然而,潜在的发病机制仍然是难以捉摸的。在这里,我们报告了果蝇刺突变pkIG 1 -1表现出强烈的癫痫发作,有趣的是,异常的胶质包裹。我们发现,pk是必需的神经元和胶质细胞,特别是神经鞘胶质细胞(EGN),少突胶质细胞的苍蝇类似物,为保护动物癫痫发作。我们进一步发现,Pk直接结合到膜骨架结合蛋白Ankyrin 2(Ank 2),从而调节细胞粘附分子Neuroglian(Nrg)。这种蛋白质相互作用也适用于它们的人类同源物。此外,nrg和ank 2突变果蝇也显示癫痫发作表型,并且Nrg或Ank 2的表达挽救了pkIG 1 -1果蝇的癫痫发作。因此,我们的研究结果表明,Prickle通过调节神经元和成鞘胶质细胞之间的细胞粘附来确保神经元-胶质细胞之间的相互作用。这一过程的失调可能代表了PRICKLE 1相关癫痫的保守致病机制。癫痫棘突突变果蝇表现出有缺陷的胶质包裹在神经元或胶质细胞中表达Sple同种型足以抑制癫痫发作棘突是神经鞘胶质细胞抑制癫痫发作的关键棘突调节细胞粘附分子神经胶质细胞通过锚蛋白2细胞生物学;分子生理学;神经科学
Human PRICKLE1 gene has been associated with epilepsy. However, the underlying pathogenetic mechanisms remain elusive. Here we report a Drosophila prickle mutant pkIG1-1 exhibiting strong epileptic seizures and, intriguingly, abnormal glial wrapping. We found that pk is required in both neurons and glia, particularly neuropil ensheathing glia (EGN), the fly analog of oligodendrocyte, for protecting the animal from seizures. We further revealed that Pk directly binds to the membrane skeleton binding protein Ankyrin 2 (Ank2), thereby regulating the cell adhesion molecule Neuroglian (Nrg). Such protein interactions also apply to their human homologues. Moreover, nrg and ank2 mutant flies also display seizure phenotypes, and expression of either Nrg or Ank2 rescues the seizures of pkIG1-1 flies. Therefore, our findings indicate that Prickle ensures neuron-glial interaction within neuropils through regulating cell adhesion between neurons and ensheathing glia. Dysregulation of this process may represent a conserved pathogenic mechanism underlying PRICKLE1-associated epilepsy. Epileptic prickle mutant flies exhibit defective glial wrapping Expressing Sple isoform in either neurons or glia is sufficient to suppress seizures prickle is vitally required in neuropil ensheathing glia for suppressing seizures prickle regulates cell adhesion molecule Neuroglian through Ankyrin 2 Cell biology; Molecular physiology; Neuroscience
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