人体气管上皮细胞中的酒精诱导的改变型甘氨酸促进细菌粘附
Pi-Wan Cheng1,2, Souvik Datta1, Derrick R Samuelson3
1Department of Biochemistry and Molecular Biology, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA.
FEBS open bio
|December 22, 2025
概括
过度饮酒会改变气道细胞的甘氨酸,增加肺炎的风险. 这些变化促进了细菌的粘附,特别是Klebsiella pneumoniae和Streptococcus pneumoniae,损害了免疫防御.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 葡萄糖生物学 葡萄糖生物学
背景情况:
- 过度饮酒是细菌性肺炎的已知危险因素.
- 将酒精摄入与感染风险增加联系在一起的具体机制,特别是关于气道上皮细胞变化,尚未完全理解.
研究的目的:
- 调查人类呼吸道上皮细胞中酒精诱导的甘氨酸变化是否促进了克莱布西拉肺炎 (Kp) 和链球菌肺炎 (Sp) 的粘附.
主要方法:
- 人的气管上皮细胞暴露在酒精中.
- 分析了N-葡萄糖和O-葡萄糖的变化.
- 使用Kp和Sp进行了细菌粘附测试.
- 评估了特定化合物的抑制作用 (α-甲基曼诺酸,阿尔德海德脱酶2激活剂1,绵羊亚马克西拉菌).
主要成果:
- 酒精暴露诱导高曼诺斯的N-甘氨酸在气管上皮细胞中与α3-曼诺斯终结,增强Kp粘附.
- 酒精还诱导了α2-6sialo粘素O-甘氨酸,从而增加了Sp粘附.
- 观察到特定分子的抑制,包括化脱酶2激活剂1.
结论:
- 酒精消费诱导人体呼吸道上皮细胞中特定的甘氨酸变化.
- 这些改变的甘氨酸促进了关键细菌性肺炎病原体Kp和Sp的粘附.
- 这种甘氨酸修饰通过损害免疫功能,有助于增加细菌性肺炎风险.
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