Brain gangliosides in axon-myelin stability and axon regeneration.

Brain gangliosides in axon-myelin stability and axon regeneration.
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DOI:
10.1016/j.febslet.2009.10.011
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发表时间:
2010-05-03
期刊:
影响因子:
3.5
通讯作者:
Schnaar RL
Schnaar RL
中科院分区:
生物学3区
文献类型:
--
作者:
Schnaar RL

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神经节苷脂是一种含有唾液酸的鞘糖脂,在大脑中以高丰度和复杂性表达。改变的神经节苷脂表达导致神经疾病,包括癫痫发作和轴突变性。脑神经节苷脂部分通过与神经节苷脂结合凝集素髓鞘相关糖蛋白(MAG)相互作用发挥功能。MAG位于髓鞘的最内层,与轴突上的神经节苷脂GD 1a和GT 1b结合。MAG-神经节苷脂结合确保最佳的轴突-髓鞘细胞-细胞相互作用,增强轴突-髓鞘的长期稳定性并抑制损伤后轴突生长。对脑神经节苷脂分子相互作用的了解可以提高对轴突-髓鞘稳定性的了解,并为促进神经损伤后的恢复提供机会。
Gangliosides, sialic acid-bearing glycosphingolipids, are expressed at high abundance and complexity in the brain. Altered ganglioside expression results in neural disorders, including seizures and axon degeneration. Brain gangliosides function, in part, by interacting with a ganglioside-binding lectin, myelin-associated glycoprotein (MAG). MAG, on the innermost wrap of the myelin sheath, binds to gangliosides GD1a and GT1b on axons. MAG-ganglioside binding ensures optimal axon-myelin cell-cell interactions, enhances long term axon-myelin stability and inhibits axon outgrowth after injury. Knowledge of the molecular interactions of brain gangliosides may improve understanding of axon-myelin stability and provide opportunities to enhance recovery after nerve injury.
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