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在胃癌中粘膜微生物群的表征识别识别了与免疫活性相关的转录相关的胃微生物群签名
Chengjia Qian1, Jiang Hui1, Ziyao Peng2
1Department of Gastrointestinal Surgery, Affiliated Hospital of Jiangnan University, Wuxi, China.
Frontiers in immunology
|October 8, 2024
概括
胃癌 (GC) 瘤显示出比正常组织更高的微生物多样性,与免疫反应相关的特定细菌. 瘤中的高免疫激活转录 (IAT) 水平预测了更好的生存率,这表明微生物组调节作为治疗点.
科学领域:
- 在瘤学瘤学.
- 微生物组研究 微生物组研究
- 免疫学 免疫学 免疫学
背景情况:
- 瘤微环境 (TME) 包括免疫细胞和胃粘膜微生物组,这两者对于癌症进展和患者的结果至关重要.
- 虽然这些元素的意义得到了认可,但它们的综合性表征和相互作用,特别是GC中免疫细胞相关的微生物群签名,仍未得到充分探索.
研究的目的:
- 在170名胃癌 (GC) 患者的胃粘膜微生物组的特征及其与免疫激活相关转录 (IATs) 的关联.
- 研究微生物组和IAT特征在预测GC患者结果和治疗疗效方面的临床病理学意义.
主要方法:
- 使用16s rRNA基因测序分析了170个GC瘤组织和匹配的非瘤组织的微生物组成.
- 使用定量逆转录PCR测量关键IATs (例如CXCL9,CXCL10,GZMA,GZMB,PRF1,IFNG) 的表达水平.
- 进行了微生物相互作用网络分析和斯皮尔曼相关性,以确定微生物物种和IAT之间的关联.
主要成果:
- 与非瘤组织相比,GC瘤组织中的微生物多样性和丰富性明显高于非瘤组织.
- 在瘤组织中观察到IATs (CXCL9,CXCL10,GZMA,GZMB,PRF1,IFNG) 的高表达,与改善的无病生存率相关.
- 增加的微生物群丰富性和均性与更高的IAT表达有关,这表明微生物组和瘤免疫病理学之间存在联系,Akkermansia muciniphila可能调节GZMB表达.
结论:
- 胃粘膜微生物组的变化在GC中很重要,可能会影响瘤免疫病理学和患者的生存.
- IAT作为预测GC患者存活率的有价值生物标志物,突出了它们在TME内的免疫激活中的作用.
- 调节瘤微生物群是一种潜在的治疗策略,可以改善GC患者的临床结果.
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