TAM受体调节微质生理学的多个特征
Lawrence Fourgeaud1, Paqui G Través1, Yusuf Tufail2
1Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA USA 92037.
Nature
|April 7, 2016
概括
微细胞使用TAM受体Mer和Axl清除死细胞并对脑损伤作出反应. 这些受体的缺陷会损害微质功能,影响中枢神经系统的神经发生和损伤反应.
科学领域:
- 神经科学
- 免疫学
- 细胞生物学
背景情况:
- 微细胞作为中枢神经系统损伤传感器和细胞,清除细胞碎片.
- 特定信号通路在调节微质功能,特别是细胞和损伤反应中的作用仍然是一个活跃的研究领域.
研究的目的:
- 研究TAM受体氨酸激酶 (Mer和Axl) 在微质功能调节中的作用.
- 确定TAM受体对中枢神经系统 (CNS) 损伤的细胞清除和微质反应的影响.
主要方法:
- 使用缺乏微质MER和AXL的成年小鼠.
- 采用现场两光子成像来评估微质过程的运动性和受伤反应.
- 在成年神经发生过程中分析了细胞的微细胞分解.
- 在帕金森病小鼠模型中检查微质轴突表达.
主要成果:
- 缺乏微质MER和AXL的小鼠在神经元中枢神经系统区域中显示出显著的亡细胞积累.
- 在成年神经发生过程中,质细胞的微细胞被TAM受体配体Gas6和蛋白S调节.
- 缺乏TAM的小质体表现出减少的过程运动性和延迟到脑损伤部位的迁移.
- 在帕金森病小鼠模型中,微质轴表达显著上调.
结论:
- TAM受体 (Mer和Axl) 是微细胞清除和对中枢神经系统损伤的反应的关键调节者.
- 这些发现确定TAM受体是微质生理学的关键控制器.
- TAM受体是中枢神经系统疾病的潜在治疗点,其特征是小质功能受损.
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