广泛的无调节的U2AF1拼接具有预后性,并通过蛋白质阿尔金因甲基转移酶激活增加了白血病转化
Meenakshi Venkatasubramanian1,2, Leya Schwartz3, Nandini Ramachandra3
1Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH.
bioRxiv : the preprint server for biology
|February 19, 2024
概括
一种名为OncoSplice的新方法确定了急性髓性白血病 (AML) 中的一种拼接亚型,该亚型会使预后恶化. 准PRMT5和IRAK4可以扭转这种拼接缺陷,并抑制癌症的生长.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 基因组学就是基因组学.
背景情况:
- 拼接失调与癌症有关,通常是通过拼接因子突变.
- 在没有这些突变的情况下,替代拼接在癌症中的作用不太清楚.
- 急性髓性白血病 (AML) 提供了一个研究拼接变化的机会.
研究的目的:
- 开发一种新的方法,OncoSplice,用于识别AML的剪接变化和患者亚型.
- 独立于已知的拼接因子突变,研究拼接失调的影响.
- 基于拼接机制,发现AML潜在的治疗点.
主要方法:
- 开发和应用OncoSplice计算工具.
- 分析成人和儿科AML患者队列中的拼接模式.
- 在临床前模型中,药理上抑制PRMT5和遗传删除IRAK4.
- 评估白血病干细胞 (LSC) 程序和差异化诱导.
主要成果:
- OncoSplice确定了多样化的患者亚型,包括在40%以上的AML病例中出现双相不良预后的特征.
- 这种签名复制U2AF1-突变拼接,影响成千上万的基因,并选择昼夜拼接程序.
- 抑制PRMT5纠正异常拼接和减少白血病细胞生长.
- 删除IRAK4阻断了白血病的发展,促进了细胞分化.
结论:
- 一种新的,不依赖突变的拼接机制有助于AML的预后和进展.
- 针对像PRMT5这样的特定拼接调节器和像IRAK4这样的下游效应器显示了AML的治疗潜力.
- 在癌症中解剖复杂的拼接景观,OncoSplice提供了一个强大的工具.
相关概念视频
RNA Splicing
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Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
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Alternative RNA Splicing
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Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
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