相关实验视频
Updated: May 3, 2026
09:01
Chronic Salmonella Infected Mouse Model
Published on: May 31, 2010
17.3K
PPARα通过调节免疫代谢和巨细胞两极分化来加剧沙门氏菌和伤寒菌感染
Jessica R Taddeo1, Naomi Wilson1, Anita Kowal1
1Center for Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA.
Gut microbes
|November 7, 2024
概括
沙门氏菌 Typhimurium 感染会引发影响炎症的脂质变化. 用Etomoxir向脂肪酸氧化减少了小鼠的细菌负载和改变了免疫细胞反应.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 代谢过程中的代谢.
背景情况:
- 沙门氏菌Typhimurium (STm) 引起胃肠道疾病和全身感染.
- 伊可索诺酸,生物活性脂质,在感染期间调节炎症反应.
- 过氧体增殖器激活受体 (PPARs) 影响脂质代谢和免疫细胞功能.
研究的目的:
- 为了研究脂质-免疫信号轴在沙门氏菌Typhimurium感染中的作用.
- 为了确定PPARα如何影响STm感染结果.
- 探索抑制脂肪酸氧化对STm感染的影响.
主要方法:
- 感染STm的野生型和缺乏PPARα的小鼠的比较.
- 对炎症性基因表达,炎和细菌传播的分析.
- 巨细胞极化研究和测量eicosanoid和ceramide的生产.
- 在受感染的巨细胞和小鼠中使用脂肪酸氧化抑制剂Etomoxir治疗.
主要成果:
- 缺少PPARα可以减少性传播感染期间的炎症特征和细菌传播.
- STm感染促进了M2b巨细胞的两极分化,减少了阿拉基酸和胺.
- 埃托莫西尔治疗减少了细菌负担,增加了巨细胞死亡.
- 在体内,Etomoxir治疗改变了胺水平,减少了炎,并改变了巨细胞群.
结论:
- 一个新的脂质-免疫信号轴与沙门氏菌感染有关.
- 脂质代谢在细菌感染期间显著调节肠道炎症.
- 向脂肪酸氧化通路可能提供针对沙门氏菌的治疗策略.
相关概念视频
01:23Stringent Response in E. coli
528
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
528
01:26Gastritis II: Pathophysiology
52
The pathophysiology of gastritis begins with the colonization of the stomach lining by Helicobacter pylori (H. pylori). This bacterium spreads mainly via the oral-oral route through saliva or shared utensils, and can also be transmitted in overcrowded or unhygienic environments through contaminated water, despite its brief survival outside the body.ColonizationOnce ingested, H. pylori enters the stomach and begins colonization by navigating through the mucus layer lining the stomach wall. It...
52
01:25Inflammatory Bowel Disease III: Crohn's Disease
35
Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...
35