大肠杆菌突变对结直肠癌发生的贡献
Bingjie Chen1,2, Daniele Ramazzotti3, Timon Heide1,4
1Centre for Evolution and Cancer, The Institute of Cancer Research, London, UK.
Nature communications
|November 29, 2023
概括
结肠直肠癌基因组显示出不同的突变模式. 我们的研究表明,正常结肠密室中的聚基胺合成酶阳性大肠杆菌可能会在人体肠道中驱动早期致癌.
科学领域:
- 基因组学就是基因组学.
- 微生物学 微生物学
- 癌症研究 癌症研究
背景情况:
- 结肠直肠癌 (CRC) 通常以C>T除染 (COSMIC签名1) 或不匹配的修复签名为特征.
- 在CRC中驱动基因突变并不总是与已知的突变特征保持一致.
- 研究瘤邻近的正常结肠组织中的突变过程对于了解早期癌症发展至关重要.
研究的目的:
- 从结直肠癌患者的正常结肠密室中识别突变特征.
- 为了确定这些特征是否与特定的细菌物种有关.
- 探索这些特征在早期结直肠瘤发生中的作用.
主要方法:
- 来自癌症患者的正常结肠密码的全基因组测序和匹配的瘤数据.
- 分析离癌组织远处和邻近癌症组织的密室.
- 甲基因组分析以确定微生物的存在.
主要成果:
- 来自CRC患者的正常结肠密室显示出高发病率的聚基化合成酶阳性大肠杆菌 (pks+E. coli) 突变和印尔特征.
- 这些特征与通常在健康个体中观察到的特征不同.
- 识别的特征与相应的癌症样本中发现的驱动突变相关,包括染色质修饰基因中的突变.
结论:
- 在正常结肠密室中发现了pks+大肠杆菌突变特征,这表明它与结肠直肠癌发育的早期阶段有关.
- 这些发现表明pks+大肠杆菌是人类肠道癌症发生的潜在驱动因素.
- 进一步研究pks+大肠杆菌诱导的突变发生机制是有必要的.
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