在高的生理温度下,HilE调解了伤寒型沙门氏菌血清体的运动温度调节
Rivka Shem-Tov1,2,3, Ohad Gal-Mor1,2,3
1The Infectious Diseases Research Laboratory, Sheba Medical Center, Tel-Hashomer, Israel.
PLoS pathogens
|October 16, 2025
概括
发烧型沙门氏菌,就像S. Paratyphi A一样,在发烧温度 (40°C) 时抑制鞭毛细胞运动,这是由于HileE. 这种温度调节可能会在肠道发烧期间限制伤寒型沙门氏菌的全身传播.
科学领域:
- 微生物学 微生物学
- 细菌病原体的产生
- 分子生物学分子生物学
背景情况:
- 沙门氏菌 (Salmonella enterica) 血清菌会引起不同的疾病:伤寒血清菌会引起全身性肠热,而非伤寒型沙门氏菌 (NTS) 会引起胃肠炎.
- 区分这些疾病结果的分子机制仍然不太了解.
研究的目的:
- 为了研究在模拟发烧的高温下对伤寒和非伤寒沙门氏菌的鞭毛运动的不同调节.
- 为了确定控制沙门氏菌温度依赖的运动性的遗传因素.
主要方法:
- 使用温度响应的染色体记者系统和转子子突变发生屏幕.
- 评估了37°C和40°C的细菌运动性和基因转录.
- 进行基因删除以研究HileE和HildD的作用.
主要成果:
- 类型型 S. Paratyphi A 在40°C时抑制了鞭毛体规律的转录,翻译和运动,与NTS S. Typhimurium 不同.
- HilE被确定为S. Paratyphi A在高温下运动的负调节者,依赖于HildD.
- 通过HileE介导的运动热调节是伤寒血清病毒 (S. Typhi,S. Sendai) 的特征,但不是S. Paratyphi B或NTS.
- 缺少HileE增加了巨细胞在40°C时吸收的S. Paratyphi A.
结论:
- 在型沙门氏菌中,Hile对于运动性温度调节至关重要.
- 这种温度调节可能有助于限制肠发烧期间伤寒型沙门氏菌的系统传播.
- 希尔E的功能代表了伤寒血清病毒在感染期间对宿主-病原体相互作用的独特适应.
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