视神经是视觉传入中枢的唯一通路,主要细胞成分包括神经节细胞和神经胶质细胞。星形胶质细胞(AS)是一种存在于中枢神经系统(包括视神经)的神经胶质细胞,生理状况下起着支持神经细胞、清除代谢产物的功能。由于影响因素的差异,AS活化可以分为具有神经毒性的A1型AS活化和具有神经保护作用的A2型AS活化。因此管理AS活化途径对视神经损伤后减少视神经元凋亡以及促进神经轴突再生有着潜在的价值。本文将从AS的基本生理功能出发,围绕这2种不同类型的AS活化,对其活化机制、诱导因素以及应用价值进行综述,以期为视神经损伤的治疗提供新的思路及方向。
The optic nerve is the only pathway that transduct visual signals into visual centers, and is consisted of retinal ganglion cells and glial cells. Astrocytes, the most abundant neuroglia in center nerve system (CNS), are considered as structural supporter and carrier of metabolic components of neurons. In recent years, astrocytes have become treasure of neurological study due to their dual effects after nerve injury. The neurotoxic reactive astrocytes are termed as A1-type, and the neuroprotective ones are termed as A2-type. For the purpose of reducing neuron loss after optic nerve injury, it is critical to find out proper management methods of astrocyte reactivity. In this paper, we will concentrate on the inducers, mechanisms and influences of astrocyte reactivity in optic nerve and CNS, and then, summarize present possible interference ways to a neuroprotective outcome.
张明旭,杨嘉玮,赵秀兰,等. 星形胶质细胞活化在视神经损伤中的研究进展[J]. 中华神经医学杂志,2021,20(03):313-318.
DOI:10.3760/cma.j.cn115354-20200227-00126版权归中华医学会所有。
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