马拉特1 lncRNA 作为局部的mRNA 传输到细胞质,编码神经元中的一个小
Wen Xiao1, Reem Halabi1, Chia-Ho Lin1
1Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California 90095, USA.
Genes & development
|April 30, 2024
概括
转移相关的肺腺癌转录1 (MALAT1) RNA移动到神经元中的细胞质中,在那里它充当编码RNA. 这一发现揭示了 MALAT1 的存在.
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:
- 突触功能依赖于神经元轴突和树突中的局部mRNA翻译.
- 在大多数细胞中,转移相关的肺腺癌转录1 (MALAT1) 主要是核长非编码RNA.
研究的目的:
- 研究MALAT1在神经元功能和突触可塑性中的作用.
- 为了确定MALAT1是否可以在大脑中充当编码RNA.
主要方法:
- 使用反感性寡核化物 (ASOs) 来消耗MALAT1.
- 神经元中的免疫光和与Staufen1蛋白共同染色.
- 培养小鼠皮层神经元的核糖体概况.
- 在小鼠胚胎干细胞中进行基因编辑,以创建M1-GFP融合蛋白.
- 在野生型神经元中对M1的抗体染色.
主要成果:
- 一部分MALAT1RNA存在于分化神经元的细胞质中.
- MALAT1 枯竭增加了前和后突触蛋白的表达.
- MALAT1定位在轴突和树突中的神经元点,与Staufen1.1共同定位.
- 核糖体剖析显示了MALAT1.1的5'区域内的短开放读取.
- MALAT1的M1读取转化为神经元中的,其表达通过突触刺激得到增强.
结论:
- MALAT1 在大脑中作为细胞质编码RNA的功能.
- 马拉特1在调节突触功能和蛋白质表达方面发挥作用.
- 突触活动调节MALAT1.1的翻译.
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