使用RNA测序数据预测无意中介的mRNA衰变从接事件在败血症使用RNA测序数据
Jaewook Shin1, Alger M Fredericks1, Brandon E Armstead1
1Division of Surgical Research, Department of Surgery, Rhode Island Hospital/Alpert Medical School of Brown University; Providence, 02903, USA.
medRxiv : the preprint server for health sciences
|April 16, 2025
概括
替代拼接和无意中介的mRNA衰变 (NMD) 是关键的基因表达调节者. 一个新的NMD管道揭示了在败血症中较高的NMD率,表明有目的的转录下调或改变拼接,并确定了潜在的败血症目标.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 生物信息学是一种生物信息学.
背景情况:
- 替代拼接 (AS) 和无意中介的mRNA衰变 (NMD) 是调节基因表达的关键保存机制.
- 了解AS-NMD相互作用对于破译细胞对疾病状态的反应至关重要.
研究的目的:
- 引入和验证一个NMD管道,用于预测依赖于过早终止子 (PTC) 的NMD率.
- 用全血RNA测序数据调查AS-NMD在败血症中的作用.
主要方法:
- 开发一个使用Whippet进行AS数据分析的NMD管道.
- 对来自败血症患者和对照者的全血样本进行深度RNA测序的应用.
- 对差异性基因表达和AS事件的统计分析,为调整后的p值<0.05设置了显著性值,对log2foldchange结果 >2,概率 >=0.9,和DeltaPsi结果 >0.1.
主要成果:
- 与对照组和幸存者组相比,NMD管道在败血症和已故患者组中的NMD发病率更高.
- 非外显子跳过AS事件的占主导地位与疾病严重程度和死亡率相关.
- 通过NMD管道分析识别可能在败血症中发挥新型作用的蛋白质.
结论:
- 开发的NMD管道是研究AS-NMD机制以及差异基因表达的宝贵工具.
- 败血症中NMD率升高可能表明有目的的转录下调或由于生理变化的异常拼接.
- 该研究强调了毒症干预的潜在新型蛋白质点.
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