一个与南极细菌共享的结域促进了Vibrio cholerae的人类细胞结合和肠道殖民
Cameron J Lloyd1,2, Shuaiqi Guo3, Brett Kinrade3
1South Texas Center for Emerging Infectious Diseases, University of Texas, San Antonio, TX 78249.
概括
霍乱病毒使用共享的结域 (PBD) 来殖民人类肠道并形成生物膜. 抑制这种PBD可以减少V.霍乱菌在小鼠中的殖民,从而成为潜在的治疗点.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 病原体与宿主之间的相互作用
背景情况:
- 霍乱病毒病毒通过殖民人类胃肠道引起霍乱大流行.
- 旗调节血凝素A (FrhA) 是V.霍乱菌殖民的关键粘合物.
- 在FrhA和南极细菌的冰结合蛋白中存在一个保存的结合域 (PBD).
研究的目的:
- 研究结域 (PBD) 在V. cholerae粘附,殖民和生物膜形成中的作用.
- 探索V. cholerae和Marinomonas primoryensis之间的PBDs的功能互换性.
- 评估PBD抑制剂对V.霍乱感染的治疗潜力.
主要方法:
- 在 FrhA.内对结域 (PBD) 的识别和表征.
- 功能性检测包括血凝,上皮细胞结合和肠道殖民模式.
- 生物膜形成试验.生物膜形成试验.
- 在使用婴儿小鼠模型的体内研究.
- 跨物种的PBD插入和功能分析.
主要成果:
- 在FrhA中的PBD介导血液凝结,上皮细胞结合,肠道殖民化和生物膜形成.
- 来自M. primoryensis的PBD可以在功能上替代FrhA中的PBD,使V. cholerae能够结合人类细胞并殖民肠道.
- 针对PBD的抑制剂显著减少了V. cholerae与人类细胞和藻结合,抑制了生物膜的形成,并减少了婴儿小鼠的肠道殖民.
结论:
- 霍乱病毒利用与环境细菌保存的结域 (PBD) 来增强肠道殖民和生物膜形成.
- 跨物种的PBD的保存功能突显了它在V. cholerae病原发生中的关键作用.
- 用抑制剂向PBD是一种有前途的策略,用于预防和治疗霍乱感染.
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