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分泌IgA功能障碍是Fusobacterium感染结直肠癌的不良预后的基础
Ilseok Choi1, Kyung-A Kim2, Sang Cheol Kim3
1Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul, Republic of Korea.
在结直肠癌 (CRC) 中,Fusobacterium nucleatum (Fn) 损害了分泌IgA (sIgA) 的产生,从而破坏了粘膜免疫力. 这导致细菌透率增加,患者的治疗结果更差.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
背景情况:
- * *Fusobacterium nucleatum* (Fn) 经常在结直肠癌 (CRC) 中发现,并与不良结果有关.
- *Fn影响CRC瘤微环境的确切机制尚未完全理解.
研究的目的:
- * 调查Fn对CRC瘤微环境的影响.
- *阐明Fn与CRC预后不佳相关的机制.
主要方法:
- *对42个CRC患者组织的单细胞转录组分析 (Fn阳性与Fn阴性).
- *无细菌小鼠模型和公开CRC小鼠模型数据的重新分析.
- *验证Fn在损害分泌IgA (sIgA) 诱导中的因果作用.
主要成果:
- *Fn通过干扰瘤相关的巨细胞通信来破坏IgA血细胞的发育和sIgA的产生.
- * 在Fn阳性CRC患者中鉴定了失调的IgA成熟 (IGAM) 模块.
- *IGAM签名有效地分层Fn阳性患者,并表明粘膜免疫力受损.
结论:
- *Fn损害sIgA的产生,导致瘤微生物负担增加和慢性炎症.
- *因Fn破坏粘膜免疫,导致CRC的预后恶化.
- * 结果表明基于IGAM签名的有针对性的治疗策略的潜力.
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