马拉特1 lncRNA 作为局部化mRNA被运送到细胞质,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, CA 90095.
bioRxiv : the preprint server for biology
|February 14, 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,调节突触蛋白质的表达. 这种核非编码RNA在大脑中充当细胞质编码RNA,影响突触功能.
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.
- 转移相关的肺腺癌转录1 (MALAT1) 主要是一种核非编码RNA.
- 马拉特1在神经元细胞质功能和突触调节中的作用在很大程度上尚未被探索.
研究的目的:
- 研究MALAT1在神经元功能中的作用.
- 为了确定MALAT1是否可以在细胞质中翻译并影响突触蛋白.
主要方法:
- 通过免疫光学研究了MALAT1在分化神经元中的局部化.
- 在神经元中减少MALAT1,以评估对突触蛋白表达的影响.
- 在小鼠皮层神经元上进行了核糖体分析.
- 生成基因编辑小鼠ES细胞来表达来自MALAT1位点的M1-GFP融合蛋白.
- 在野生型神经元中确认了M1的存在和表达变化.
主要成果:
- 一部分MALAT1RNA转移到神经元细胞质中.
- 马拉特1减少增加了前和后突触蛋白质的表达.
- 核糖体剖析揭示了MALAT1.1内的短开放读取的翻译.
- MALAT1的M1开放读取被转化为神经元中的,通过突触刺激增强表达.
结论:
- MALAT1 在大脑中充当细胞质编码RNA,影响突触功能.
- 神经元MALAT1是动态调节的,在突触可塑性中起作用.
- 这些发现揭示了MALAT1超出其核作用的新功能.
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