可转移元素调解基因效应,改变结直肠癌附近基因的表达
Nikolaos M R Lykoskoufis1,2,3,4, Evarist Planet5, Halit Ongen6,7,8
1Department of Genetic Medicine and Development, University of Geneva Medical School, 1211, Geneva, Switzerland. nikolaos.lykoskoufis@gmail.com.
Nature communications
|January 25, 2024
概括
可移植元素 (TE) 显著影响基因调节,并可以驱动癌症. 这项研究揭示了结直肠癌中特定的TE基因表达联系,突出了它们在瘤发生和潜在治疗点中的作用.
科学领域:
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 可转移元素 (TE) 在人类基因组中丰富,并与基因调节有关.
- 在结直肠癌的发展过程中,TEs在影响基因表达中的特定作用尚未完全理解.
- TE 干扰是已知的导致瘤发生的因素.
研究的目的:
- 研究可移植元素对正常和结直肠癌组织基因表达的影响.
- 确定结直肠癌特异性的TE表达定量特征位点 (eQTLs) 和它们的调节机制.
- 阐明TE作为癌症驱动基因遗传效应的调解者的作用.
主要方法:
- 从SYSCOL队列的正常和瘤结肠组织中分析了10,231个和5,199个TE表达量的定量特征位点 (eQTLs) (275个正常,276个癌症样本).
- 鉴定了376个结直肠癌特异性TE-eQTLs,与甲基化变化相关.
- 利用贝叶斯网络来识别TEs调解基因表达的遗传影响,包括已知的癌症驱动因素.
主要成果:
- 在正常和瘤组织中发现了大量的TE-eQTLs,其中376个特异于结直肠癌.
- 特定于瘤的TE-eQTL显示出更大的转录因子丰富,表明它们在癌症中具有不同的调节作用.
- 确定了1,766个TE作为调解者,改变了1,558个基因的表达,包括55个已知的癌症驱动基因,瘤特异性的TE-eQTL激活了TE驱动能力.
结论:
- 可移植的元素在调节结直肠癌中的基因表达方面发挥着至关重要的作用.
- 瘤中的特定TE-eQTL受甲基化影响,通过激活癌症驱动基因,促进瘤发生.
- 这些发现为癌症驱动因素提供了新的见解,并建议针对TE调节的潜在治疗策略.
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