对RNA-seq数据集的综合生物信息分析揭示了人类组织中野生类型和变异UGT1A转录的差异和可变表达及其在癌症中的放松调节
Dong Gui Hu1, Shashikanth Marri1, Julie-Ann Hulin1
1College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Bedford Park, Adelaide 5042, Australia.
Cancers
|January 23, 2024
概括
这项研究揭示了在人类组织和癌症中UGT1Av2和v3转录表达的显著差异. 这些编码不活跃的UGT1A蛋白质的变异性转录,在瘤中显示出改变的比率,这表明它们在癌症代谢中发挥了作用.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 癌症研究 癌症研究
背景情况:
- UGT1A位点产生许多替代拼接的转录,包括v2和v3,它们编码不活跃的UGT1A蛋白 (i2s).
- 这些i2s蛋白质可以负面调节葡萄化并影响癌细胞代谢.
- 组织特异性丰富度,个体间的变异性,以及与癌症相关的UGT1Av2和v3转录的放松调节仍然在很大程度上没有特征.
研究的目的:
- 综合评估UGT1A v1,v2和v3转录在正常人体组织和各种癌症类型中的丰度,个体间变异性和差异表达.
- 为了研究这些转录在癌症组织中的潜在放松调节,与它们的正常对应物相比.
- 为了识别新的UGT1A转录,并描述它们的蛋白质产品.
主要方法:
- 使用RNA测序 (RNA-seq) 数据对UGT1Av1,v2和v3转录表达水平的量化.
- 分析了来自六种癌症类型 (肝脏,脏,结肠,胃,食道,膀) 的大量正常组织和配对的正常和瘤组织.
- 生物信息分析以确定转录的丰富性,可变性,比率和差异性表达模式.
主要成果:
- 在不同的组织类型中观察到v2和v3转录丰度的显著变化,以及组织内部的高个体间变异性.
- 组织之间v2到v3变异的比例有所不同,这表明不同的调节机制.
- 胃肠组织中较高的v2丰度表明,i2蛋白质对葡萄糖化有更大的负调节.
- 与正常组织相比,瘤通常表现出增加的v2/v1和/或v3/v1表达比率,突出显示了变异在癌症中的作用.
- 确定了10个具有新的3'终端外子的新型UGT1A转录,许多编码蛋白质的结构类似于UGT1A_i2.
结论:
- UGT1A v2和v3转录显示显著的组织特异性表达和个体间的变化,在各种癌症中变化的比率.
- 这些发现强调了UGT1A变异在癌症代谢中的潜在作用,并突出了它们的差异调节.
- 发现新的UGT1A转录扩大了我们对UGT1A位点复杂性及其对蛋白质组的贡献的理解.
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