Fusobacterium nucleatum 脂多糖类O-抗原定义了一个新的Siglec-7结合性表皮
Cristina Di Carluccio1,2, Ferran Nieto-Fabregat1, Linda Cerofolini3
1Department of Chemical Sciences, University of Naples Federico II, Via Cinthia 4, Naples 80126, Italy.
JACS Au
|November 28, 2025
概括
Fusobacterium nucleatum LPS通过其O-抗原上的新型表位与Siglec-7相互作用. 这种相互作用揭示了免疫逃避机制,并突出了Siglec-7和LPS作为结直肠癌的潜在治疗点.
科学领域:
- 微生物学和免疫学
- 结构生物学 结构生物学
- 癌症研究 癌症研究
背景情况:
- 菌核酸菌 (Fn) 是一种与结直肠癌 (CRC) 相关的口腔细菌.
- 细菌脂多糖 (LPSs) 是疾病进展中的毒性因素.
- 免疫细胞上的抑制受体Siglec-7与Fn LPS结合,是潜在的癌症免疫治疗标.
研究的目的:
- 为了阐明Siglec-7和Fn LPS之间的分子相互作用.
- 为了确定Fn LPS O-抗原上的特定结合表位.
- 探索Fn相关CRC的潜在治疗策略.
主要方法:
- 结构生物学技术 结构生物学技术
- 生物物理测定试验
- 核磁共振 (NMR) 光谱学 核磁共振 (NMR) 光谱学
- 计算建模计算建模
主要成果:
- 在LPS O-抗原中确定了一种新的Siglec-7结合表位,涉及酸和AAT残留物.
- O-抗原的独特"翼状"运动促进了Siglec-7的结合,由BC循环进行优先相互作用.
- 这种相互作用代表了Fn.的新型免疫逃避机制.
结论:
- 西格莱克-7和Fn LPS被确定为Fn相关CRC的有前途的治疗点.
- 了解这种相互作用的分子基础,为癌症免疫治疗开辟了新的途径.
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