天体细胞中全球释放通路的独立调节器产生了一种用于 postsynaptic 功能所需的细胞外囊泡的亚型
Reuben Levy-Myers1, Daniel Daudelin1, Chan Hyun Na2
1The Solomon Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, PCTB1004, 725 N. Wolfe Street, Baltimore, MD 21205, USA.
Science advances
|June 23, 2023
概括
甘酸酸酶3 (GDE3) 通过重塑actin. 控制一种途径,通过重塑actin. 释放不同的细胞外囊泡 (EVs). 这种天体细胞EV亚型在GDE3淘汰小鼠中恢复神经元功能.
科学领域:
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
- 细胞外囊泡 细胞外囊泡
背景情况:
- 细胞外囊泡 (EVs) 对于细胞间通信至关重要,但具有高度的异质性.
- 了解调节EV生物发生和功能的特定途径对于破译它们在健康和疾病中的作用至关重要.
研究的目的:
- 调查甘酸化酶3 (GDE3) 在调节EV释放和功能的作用.
- 确定GDE3影响EV生物发生和影响神经元活动的分子机制.
主要方法:
- 使用GDE3淘汰 (KO) 鼠标模型和天体细胞培养.
- 研究了威斯科特-阿尔德里奇综合征蛋白家族成员3 (WAVE3) 在GDE3介导的EV释放中的参与.
- 在海马体CA1神经元中使用微型刺激后突触电流 (mEPSC) 记录来评估突触功能.
主要成果:
- GDE3 调节动因重塑以释放含有附件 A1 和 GDE3 的特定 EV 亚型.
- 由于依赖GDE3的EV释放,因此需要WAVE3介导的actin动态.
- 来自野生类型但不是GDE3 KO或WAVE3抑制的星形细胞的星形细胞EV恢复了GDE3 KO小鼠的mEPSC振幅.
结论:
- GDE3-WAVE3通路代表了天体细胞中释放功能上不同的EVs的非冗余机制.
- 这一途径调节了actin重塑以释放支持神经突触功能的EV.
- 调节EV释放通路在细胞格局内对EV信号产生差异性影响.
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