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在METTL5-介导的18SrRNAm6中,一种修改促进皮质脊髓管在单边创伤性脑损伤后发芽

Zhenpeng Li¹, An Jiang¹, Jintao Fang¹

¹Department of Microsurgery, Orthopedic Trauma and Hand Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China; Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou 510080, China.

Experimental neurology

|October 15, 2024

概括

促进皮质脊髓管 (CST) 发芽对于脑损伤后肢体功能恢复至关重要. METTL5通过调节基因翻译来增强CST的发芽,提供新的治疗途径.

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
在RNA生物学,RNA生物学.

背景情况:

在单边脑损伤后改善肢体功能需要促进皮质脊髓管 (CST) 在中线上发芽.
虽然已知CST发芽的基因调节,但RNA修饰的作用仍然未被探索.

研究的目的:

为了研究METTL5,一个18SrRNA甲基转移酶,作为CST在小鼠中生长的调节者.
阐明METTL5影响CST发芽的分子机制.

主要方法:

在单边创伤性脑损伤的小鼠模型中检查了METTL5在CST发芽中的作用.
评估了METTL5过度表达对皮质脊髓神经元发芽的影响.
分析了包括Cfl1和Inpp5k.在内的目标基因的翻译效率 (TE) 的METTL5-介导的变化.

主要成果:

在受损性皮质脊髓神经元中METTL5的过度表达显著促进了受伤后的CST生长.
METTL5增强了多个基因的TE,包括Cfl1 (编码cofilin).
由METTL5诱导的TE对Inpp5k的上调导致了cofilin的激活,促进了actin聚合和轴突外生长.

结论:

METTL5通过调节18SrRNA m6A修饰并提高翻译效率,作为CST发芽的关键调节者.
METTL5-cofilin通路代表了一种促进轴突外生长的新机制,并为神经恢复提供了潜在的治疗点.

关键词:

在18S rRNA中.亚克森的生长超越了亚克森的生长.科菲林是指一种可菲林.皮质脊柱管的发芽脊柱管的发芽在METTL5中,使用的是METTL5.翻译效率翻译效率翻译效率单边脑损伤是一种单边脑损伤.m(6) 一个修改修改.

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