对托代谢的系统查确定了在实验性结肠炎中托利用的部位和微生物特异性特征
bioRxiv : the preprint server for biology
|December 25, 2025
概括
肠道微生物在炎症性肠病 (IBD) 中影响托代谢和NAD+合成. 微生物枯竭恢复了NAD+水平,这表明IBD的治疗点.
科学领域:
- 微生物组研究的研究.
- 代谢途径 代谢途径
- 炎症性肠病 (IBD) 是一种炎症性肠病.
背景情况:
- 改变的三甲 (Trp) 代谢和破坏的尼古丁胺氨酸二核酸 (NAD+) 合成是IBD的特征.
- 肠道微生物群在肠道炎症期间这些代谢变化中的确切作用尚不清楚.
研究的目的:
- 研究肠道微生物群在肠道炎症期间对Trp和NAD+代谢的贡献.
- 探索调节IBD中的微生物活动的治疗潜力.
主要方法:
- 针对性代谢组学被用来在患有硫酸 (DSS) 诱导的大肠炎的小鼠中分析Trp和NAD+相关代谢物.
- 小鼠接受了单独使用DSS或与宽谱抗生素 (ABX) 尾酒结合治疗.
- 代谢物被分析到各种生物区间,包括组织,光含量,便和血清.
主要成果:
- 微生物枯竭减轻了结肠炎和增加了宿主Trp的生物可用性,这表明肠道微生物群在Trp中竞争.
- 在DSS结肠炎中,通过 kynurenine 途径 (KP) 增强了 Trp 降解,但在酸酸转移酶 (QPRT) 处被阻断,导致 NAD (H) 耗尽.
- 抗生素联合治疗使KP代谢物转化正常化,并恢复了NAD (H) 水平,突出了微生物群在Trp竞争和KP调节中的双重作用.
结论:
- 粘膜NAD+合成是一种微生物调节的过程,可以减轻肠道炎症.
- 准肠道微生物群或其代谢物为IBD提供了一个潜在的新型治疗策略.
相关概念视频
Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy
609
Various diagnostic tests are employed in the diagnostic process for Inflammatory Bowel Disease (IBD), particularly to differentiate between Crohn's disease and ulcerative colitis.
Diagnostic studies
A colonoscopy is the definitive screening test, distinguishing ulcerative colitis from other colon diseases with similar symptoms. During a colonoscopy test, inflamed mucosa with exudate ulcerations can be observed, and biopsies are taken to determine the histologic characteristics of the...
Diagnostic studies
A colonoscopy is the definitive screening test, distinguishing ulcerative colitis from other colon diseases with similar symptoms. During a colonoscopy test, inflamed mucosa with exudate ulcerations can be observed, and biopsies are taken to determine the histologic characteristics of the...
609
Serum Laboratory Studies, Stool Test, Breath Test
722
Gastrointestinal (GI) diagnostic studies are pivotal in confirming, ruling out, diagnosing, or staging various diseases, including cancers. Following diagnosis, allocating time for discussions with the patient and providing informational resources is crucial. Diagnostic assessments of the GI tract often occur in outpatient settings like endoscopy suites or GI labs. Preparation for these tests may include dietary restrictions, fasting, liquid bowel preparations, laxatives, enemas, and the...
722

![Radiosynthesis of 1-2-[18F]Fluoroethyl-L-Tryptophan using a One-pot, Two-step Protocol](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F63025.jpg&w=3840&q=50)
