相关实验视频
Updated: Jun 4, 2025

Chronic Salmonella Infection Induced Intestinal Fibrosis
Published on: September 22, 2019
肠道大肠杆菌产生的yersiniabactin在克罗恩病中促进了fibrotic巨细胞的生长
Ju-Hyun Ahn1, Marlus da Silva Pedrosa1, Lacey R Lopez1
1Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
粘附性侵入性大肠杆菌 (AIEC) yersiniabactin扣留,稳定巨细胞中的HIF-1α. 这会通过破坏免疫反应和组织重塑来促进炎症性肠病 (IBD) 中的肠纤维化.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
背景情况:
- 炎症性肠病 (IBD) 纤维化是一种严重的并发症,其机制尚不清楚.
- 肠道微生物群,特别是附着侵入性大肠杆菌 (AIEC),与IBD病原发生有关.
- 之前的研究表明,AIEC产生的yersiniabactin (Ybt) 在小鼠模型中促进肠道纤维化.
研究的目的:
- 研究AIEC通过Ybt介导的金属封存如何影响IBD相关纤维化中的巨细胞功能.
- 阐明缺氧诱导因子1-alpha (HIF-1α) 在调解巨细胞中Ybt的益菌效应中的作用.
主要方法:
- 在人类IBD纤维化组织和小鼠纤维化病变中分析巨细胞的丰度和与AIEC的同定位.
- 评估Ybt对巨细胞基因表达的影响,特别是益纤维细胞标记物.
- 研究Ybt对HIF-1α稳定和巨细胞中核转位的影响.
- 在暴露于产生Ybt的AIEC的巨细胞中测量细胞内含量.
- 对依赖的HIF-1α氧化在观察到的效果中的作用的评估.
主要成果:
- 巨细胞在人类IBD纤维化和小鼠纤维化病变中很丰富,与AIEC同定位.
- Ybt通过稳定HIF-1α,一种依赖金属的调节剂,诱导巨细胞中的profibrotic基因表达.
- 产生Ybt的AIEC消耗了巨细胞内,抑制了依赖的HIF-1α氧化和稳定HIF-1α.
- 在人类IBD和小鼠模型中,在活跃疾病的部位发现HIF-1α表达的巨细胞.
结论:
- 由AIEC的Ybt进行微生物介导的金属封存是肠道纤维化的一种新型触发因素.
- Ybt通过耗和HIF-1α稳定破坏巨细胞免疫信号和组织重塑.
- 准微生物群衍生金属封存可能为IBD相关纤维化提供治疗策略.
更多相关视频
07:34Induction of Intestinal Inflammation by Adoptive Transfer of CBir1 TCR Transgenic CD4+ T Cells to Immunodeficient Mice
Published on: December 16, 2021
08:24Injections of Lipopolysaccharide into Mice to Mimic Entrance of Microbial-derived Products After Intestinal Barrier Breach
Published on: May 2, 2018
相关概念视频
Drugs for Treatment of Crohn's Disease in IBD Using Biologic Agents: Anti-TNF
Inflammatory Bowel Disease II: Crohn's Disease
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
Crohn's disease
Crohn's disease is a chronic, systemic inflammatory bowel disease (IBD) that predominantly affects the gastrointestinal tract. It is marked by...
Drugs for Treatment of Crohn's Disease in IBD Using Immunomodulatory Agents
Drugs for Treatment of Crohn's Disease in IBD Using Glucocorticoids
Inflammatory Bowel Disease IV: Pharmacological Management
Pharmacologic...
Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy
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...