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对Phascolarctobacterium与结直肠癌相关性的物种级验证

Cecilie Bucher-Johannessen^1,2,3, Thulasika Senthakumaran⁴, Ekaterina Avershina^2,3

¹Department of Research, Cancer Registry of Norway, Norwegian Institute of Public Health, Oslo, Norway.

|September 17, 2024

概括

两种Phascolarctobacterium与结直肠癌 (CRC) 有关. 在CRC中,Phascolarctobacterium succinatutens更为丰富,而P. faecium则不那么丰富,这突出了它们在CRC发展中的独特作用.

科学领域:

微生物学微生物学
胃肠病学胃肠病学
在瘤学瘤学.

背景情况:

以前的研究表明,Phascolarctobacterium丰富度与结直肠癌 (CRC) 和腺瘤之间存在联系.
这一类已被注意到,但在CRC研究中被忽视了十多年.

研究的目的:

通过使用新的队列和方法来验证Phascolarctobacterium与CRC和腺瘤的关联.
研究Phascolarctobacterium物种的生活方式和性别特异性,功能潜力和微生物相互作用.

主要方法:

分析了来自挪威三个队列 (CRCAhus,NORCCAP,CRCbiome) 的2350个样本和精选的MetagenomicData.
使用了16S rRNA测序,猎枪元基因组测序和特定物种的qPCR.
用元基因组组装的基因组来探索Phascolarctobacterium的泛基因组.

主要成果:

连续检测到三个Phascolarctobacterium物种;P. succinatutens显示出与腺瘤/CRC的正相关性,而P. faecium显示出负相关性.
在男性群体中,P. succinatutens的患病率更高. 对于每个物种,观察到不同的微生物群落和相关网络.
P. succinatutens对氨酸代谢和复杂碳水化合物降解中的基因进行了丰富;P. faecium具有特定的甘氨酸酸酶酶3.

结论:

Phascolarctobacterium succinatutens在腺瘤和CRC中显著增加,应该被认为是关键的CRC相关细菌.
在腺瘤中Phascolarctobacterium faecium的丰度减少表明它具有保护作用或不同的病因机制.
这些物种独特的生态利基和功能潜力强调了它们在肠道微生物组和CRC病变发生中的特殊作用.

关键词:

这是一种Phascolarctobacterium细菌.结肠直肠癌是什么意思微生物组是一个微生物组.

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