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Fusobacterium nucleatum负载与KRAS突变和结肠直肠腺癌中状状病原体相关
Koki Takeda1, Minoru Koi1,2, Yoshiki Okita3
1Division of Gastroenterology and Hepatology, Department of Internal Medicine and Rogel Cancer Center, University of Michigan, Ann Arbor, Michigan.
Cancer research communications
|September 29, 2023
概括
核细菌 (Fn) 感染与特定的结直肠癌类型有关,特别是那些微卫星不稳定性高 (MSI-H) 和状状通路 (SSP) 的结直肠癌类型. 增加Fn负载可能会促进SSP驱动的癌症,但不是KRAS驱动的癌症.
科学领域:
- 微生物学 微生物学
- 在瘤学瘤学.
- 遗传学 遗传学 是一个
背景情况:
- 菌核素 (Fn) 经常在结直肠癌 (CRC) 中发现.
- 已注意到Fn与CRC亚型的关联,包括微卫星不稳定性高 (MSI-H) 和BRAF突变 (状状通路 - SSP),但其在KRAS突变癌症中的作用仍在争论中.
- 在结直肠癌发生期间Fn感染的时间及其与特定基因组变化的联系仍然不清楚.
研究的目的:
- 调查fusobacterium nucleatum (Fn) 感染与结直肠癌 (CRC) 和腺瘤中的特定基因组变异之间的关联.
- 为了确定Fn负载是否与MSI-H,MLH1高甲基化,BRAF或KRAS突变在结直肠癌发生过程中的发展相关.
- 阐明Fn在形形通路 (SSP) 和CRC的非形通路中的作用.
主要方法:
- 分析Fn在结直肠癌组织和匹配腺瘤中的存在和负载.
- Fn感染状况与关键基因组变异的相关性:MSI-H,MLH1促进剂高甲基化,BRAF突变和KRAS突变.
- 在腺瘤与癌症中Fn关联的比较分析.
主要成果:
- MSI-H,MLH1高甲基化,BRAF和KRAS突变与结直肠癌中的Fn感染独立相关.
- 增加Fn拷贝数与MSI-H,MLH1高甲基化和BRAF突变相关,但CRC中没有KRAS突变.
- 在腺瘤中没有发现Fn感染与BRAF/KRAS突变或MLH1高甲基化之间的显著关联,与CRC相比,Fn负载较低.
结论:
- 在腺瘤 - 癌瘤过渡期间或之后增加Fusobacterium nucleatum (Fn) 的负载可能会促进结直肠癌 (CRC) 的状状通路 (SSP).
- Fn感染与MSI-H,MLH1高甲基化和BRAF突变独立相关,这表明在SSP驱动的CRC中发挥了作用.
- Fn似乎不会驱动KRAS突变结直肠癌发生,尽管它可能优先殖民这些瘤,并在SSP驱动的癌症中扩大更多.
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