Ring1a通过调节粘膜免疫系统和结肠微生物生态来保护大肠炎
Yashu Wang1,2, Qianru Li1,2, Jiayu Zhang3
1Department of Microbiology and Immunology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China.
Gut microbes
|September 1, 2023
概括
一个新型基因,Ring1a,通过调节肠道微生物群和免疫反应,影响炎症性肠病 (IBD). 环1a缺乏会使结肠炎恶化,并且与Prevotella相关,这表明甲尼达是潜在的治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 遗传学 遗传学 是一个
背景情况:
- 炎症性肠病 (IBD) 是一种慢性免疫疾病,其复杂,不太清楚的起源涉及遗传学,免疫力和肠道微生物群.
- 识别影响IBD病变的新型遗传因素对于了解疾病机制和开发向疗法至关重要.
研究的目的:
- 调查新型基因Ring1a在结肠炎的发展和进展中的作用.
- 阐明Ring1a缺乏对肠道免疫系统和肠道微生物群的影响.
- 探索与Ring1a缺乏相关的结肠炎的潜在治疗策略.
主要方法:
- 使用Ring1a缺乏症 (Ring1aKO) 和野生型 (WT) 鼠标的小鼠模型.
- 使用德克斯硫酸盐 (DSS) 诱导的大肠炎.
- 分析了肠道微生物组成的变化,免疫反应 (例如IgA水平) 和疾病严重程度.
- 在 Ring1aKO 小鼠中给药了甲化,以评估其治疗效果.
主要成果:
- 环1a缺乏症加剧了DSS诱导的大肠炎,表明其在肠道免疫力中的保护作用.
- 环1a缺乏导致肠道微生物群向Prevotella属转移,这种属是可传播的,并恶化了结肠炎.
- 在Ring1aKO小鼠中观察到IgA水平降低,可能将微生物群变化与免疫功能障碍联系起来.
- 在Ring1aKO小鼠中,甲尼达治疗改善了大肠炎,可能是通过减少Prevotella丰富度.
结论:
- Ring1a被确定为结肠炎的新型候选风险基因,调节粘膜免疫和肠道微生物群.
- 环1a缺乏促进了由Prevotella主导的致病性肠道微生物环境,导致大肠炎的严重程度.
- 梅特罗尼达作为治疗药物有前途,用于在Ring1a缺乏的情况下治疗与Prevotella相关的结肠炎.
相关概念视频
Inflammatory Bowel Disease I: Ulcerative Colitis
213
Introduction
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
Inflammatory bowel disease, or IBD, encompasses a group of disorders characterized by chronic inflammation or ulceration of the gastrointestinal tract.
Risk Factors
The exact cause of IBD remains unclear, although it is believed to be due to a mix of genetic, environmental, microbial, and immune factors. Genetic factors are significant in determining susceptibility to IBD, with family history being a critical risk factor. Individuals with a first-degree relative who has IBD are at...
213
Renewal of Intestinal Stem Cells
2.6K
The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
2.6K
Drugs for Treatment of Ulcerative Colitis in IBD
173
Ulcerative colitis is a chronic inflammatory condition primarily affecting the colon and rectum. The primary drugs used in the treatment of ulcerative colitis are aminosalicylates. They exhibit anti-inflammatory and immunosuppressive properties. They modulate inflammatory mediators and inhibit the activity of nuclear factor κB (NF-κB). Aminosalicylates also reduce inflammation by inhibiting prostaglandin and leukotriene production and decreasing neutrophil chemotaxis and superoxide...
173
Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy
354
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...
354
Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors
464
Peptic ulcer disease, commonly called PUD, represents a multifaceted condition characterized by disruptions in the lining of the gastrointestinal (GI) tract. Central to the protection of the gastrointestinal lining is the mucosal-bicarbonate barrier. This physiological defense mechanism is a formidable shield against the corrosive effects of gastric acid and pepsin secretion in the stomach. Its role is pivotal in maintaining the structural integrity of the stomach's inner lining.
464
Role Of Notch Signalling In Intestinal Stem Cell Renewal
2.1K
Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
2.1K


