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PTBP1调节成人外围神经元中的损伤反应和感觉通路

Stefanie Alber¹, Pierluigi Di Matteo¹, Matthew D Zdradzinski²

¹Departments of Biomolecular Sciences and Molecular Neuroscience, Weizmann Institute of Science, Rehovot 7610001, Israel.

Science advances

|July 28, 2023

概括

聚皮里米丁管结合蛋白1 (PTBP1) 在成年感官和运动神经元中意外地被发现,而不仅仅是在发育过程中. 神经损伤后轴突PTBP1的增加表明神经再生和感觉中的作用.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学

背景情况:

聚皮里米丁管结合蛋白1 (PTBP1) 传统上被认为是中枢神经元中的胚胎蛋白.
PTBP1下调促进神经元分化,这是神经退行性疾病中探索的一种策略.
在成熟的中枢神经元中,PTBP1通常被其对应物PTBP2所取代.

研究的目的:

研究成人感官和运动神经元中PTBP1和PTBP2的表达和功能.
确定PTBP1在轴突局部化和对外围神经损伤的反应中的作用.
评估PTBP1扰动对神经元再生和感官功能的影响.

主要方法:

免疫光和西部斑分析检测成人神经元中的PTBP1和PTBP2表达.
在外围神经损伤后的轴突蛋白和mRNA关联研究.
功能性测试,以评估PTBP1扰动对轴突转换,神经再生和感官知觉的影响.

主要成果:

PTBP1和PTBP2在成年感官和运动神经元中共同表达,具有明显的亚细胞局部.
在外围神经受伤后,轴突PTBP1水平显著增加.
PTBP1与轴突中的受损反应mRNA相互作用,其扰动会影响局部翻译,再生和感觉.

结论:

PTBP1在成年轴突中起着功能性作用,特别是在神经损伤和再生的反应中.
这些发现挑战了关于PTBP1仅仅是胚胎蛋白质的既定观点.
在考虑PTBP1作为神经退行性疾病的治疗点时,建议谨慎.

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