丁酸盐可以增强Clostridioides difficile在体外的分泌
Michelle A Baldassare1, Disha Bhattacharjee1, Julian D Coles1
1Department of Biological Sciences, Clemson University , Clemson, South Carolina, USA.
Journal of bacteriology
|September 1, 2023
概括
短链脂肪酸 (SCFA),像丁酸盐,直接影响肠道病原体. 丁酸盐抑制了Clostridioides difficile的生长,但增加了它的分泌,并改变了代谢以求生存.
科学领域:
- 微生物学 微生物学
- 肠道微生物组研究研究
- 传染性疾病 传染性疾病
背景情况:
- 短链脂肪酸 (SCFA) 对于肠道健康至关重要,由细菌发酵产生.
- 关键的SCFA如丁酸盐在治疗感染方面具有潜力,包括*C. difficile*.
- 对SCFA对*C. difficile*生理学的直接影响仍然不完全理解.
研究的目的:
- 调查SCFA对*C. difficile*生长,化和毒素生产的直接影响 *in vitro*.
- 阐明SCFA介导的*C. difficile*调节的分子机制.
主要方法:
- 在实验室内化*C. difficile*与SCFA的不同度.
- 评估细菌生长,分泌率和毒素水平.
- RNA测序 (RNA-Seq) 用于分析基因表达变化.
主要成果:
- 丁酸盐以剂量依赖的方式显著抑制了*C. difficile*的生长.
- 酸盐暴露导致 *C. difficile* 胞增加和毒素生产的最小变化.
- RNA-Seq揭示了与分泌,代谢 (例如,CstA) 和生存途径相关的基因的改变表达.
结论:
- 丁酸盐直接影响*C. difficile*,促进胞形成并改变新陈代谢.
- 这些变化表明,丁酸盐可能会在肠道环境中诱导*C. difficile*的替代生存策略.
- 丁酸盐的直接作用提供了作为生物标志物和治疗点对抗*C. difficile*感染的潜力.
相关概念视频
Endospores and Sporulation
65
Endospores are specialized, dormant cells primarily formed by Gram-positive bacteria, including Bacillus and Clostridium, enabling survival under extreme environmental conditions. Due to their unique composition and formation process, these structures are highly resistant to physical and chemical insults, such as extreme heat, ultraviolet and ionizing radiation, desiccation, and toxic chemicals. Rare instances of endospore-like structures have also been observed in some Gram-negative bacteria,...
65
Gene Regulation During Sporulation
34
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
34


