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CELL:小胶质细胞重塑细胞外基质,促进突触可塑性

2020-07-03 MedSci原创 MedSci原创

突触重塑是将学习记忆编码到神经环路必不可少的。最近,研究人员发现了一个神经元和小胶质细胞之间的分子相互作用,在海马区驱动经验依赖性突触重塑。

突触重塑是将学习记忆编码到神经环路必不可少的。最近,研究人员发现了一个神经元和小胶质细胞之间的分子相互作用,在海马区驱动经验依赖性突触重塑。

研究人员发现,细胞因子白细胞介素-33(IL-33)由成年海马神经元以经验依赖性的方式表达,并定义了一个神经元子集,该子集具有更强的突触可塑性。

神经元IL-33或小胶质IL-33受体的丧失会导致突触可塑性受损,新生神经元整合度降低,远程恐惧记忆的精确度降低。

在老年小鼠中,记忆精度和神经元IL-33降低,IL-33功能的获得缓解了年龄相关的突触可塑性的降低。

此外,研究人员还发现,神经元IL-33可以指导小胶质细胞吞噬细胞外基质(ECM),其损失导致ECM吞噬受损,同时与突触接触的ECM蛋白积累。

总之,这些数据定义了一个细胞机制,小胶质细胞通过该机制调节经验依赖性突触重塑,并促进记忆巩固。

 

原始出处:

Phi T. Nguyen et al. Microglial Remodeling of the Extracellular Matrix Promotes Synapse Plasticity, CELL (2020). DOI:https://doi.org/10.1016/j.cell.2020.05.050

 

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    2021-03-06 维他命
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    2021-03-03 一叶知秋
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    2020-07-04 医鸣惊人

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