相关实验视频
Updated: Sep 14, 2025

08:40
Chronic Salmonella Infection Induced Intestinal Fibrosis
Published on: September 22, 2019
7.3K
在性结肠炎中,HMGB1通过TLR4/NF-κB/GPX4通路诱导铁死,加剧肠壁损伤
Nannan Zhu1, Xiaoyuan Ge1, Lixue Zhang1
1Department of Gastroenterology, The First Affiliated Hospital of Anhui Medical University, Hefei City, Anhui Province, China.
Mediators of inflammation
|July 21, 2025
概括
高流动性组盒-1蛋白 (HMGB1) 通过驱动铁亡并破坏肠道屏障,加剧性结肠炎 (UC). 准HMGB1-TLR4/NF-κB/GPX4通路为UC提供了一个潜在的治疗策略.
科学领域:
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 肠道屏障功能障碍和炎症是性结肠炎 (UC) 的标志.
- 高流动性组盒-1蛋白 (HMGB1) 涉及UC病变发生,但其在肠道屏障损伤中的作用尚不清楚.
研究的目的:
- 研究HMGB1对UC肠道屏障损伤的作用机制.
- 探索向UC中HMGB1通路的潜在治疗影响.
主要方法:
- 对UC患者的HMGB1水平和屏障蛋白的分析 (GEO数据集GSE75214,西部涂抹).
- 德克斯硫酸盐 (DSS) 诱导的大肠炎模型在小鼠中,用二糖酸盐 (DPG) 治疗,以评估HMGB1对炎症,铁亡和屏障功能的影响.
- 在体外Caco-2细胞模型评估HMGB1对铁亡,TLR4/NF-κB/GPX4通路和屏障完整性的影响 (TEER,FITC-dextran测试).
主要成果:
- 在UC患者中,高HMGB1水平与降低屏障蛋白表达相关.
- 在DSS诱导的大肠炎中,HMGB1上调与炎症增加,铁亡以及改变TLR4/NF-κB/GPX4通路激活有关.
- 抑制HMGB1改善了结肠炎症状,恢复了屏障功能,并逆转了铁亡;体外研究证实HMGB1通过TLR4/NF-κB/GPX4通路诱导铁亡和屏障损伤.
结论:
- 在UC中,HMGB1通过通过TLR4/NF-κB/GPX4信号通路促进ferroptosis驱动肠道炎症和屏障损伤.
- 抑制这种HMGB1介导的途径代表了性结肠炎的有前途的治疗策略.
相关概念视频
Inflammatory Bowel Disease I: Ulcerative Colitis
329
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...
329
Irritable Bowel Syndrome I: Introduction
392
Irritable Bowel Syndrome (IBS) is characterized by functional disturbances in the gastrointestinal system, presenting a cluster of symptoms without evident structural or biochemical abnormalities. It primarily affects the large intestine and may cause abdominal pain, bloating, excessive gas, diarrhea, constipation, or both.
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
IBS is a chronic condition that can persist over a long period or recur frequently.
The pathogenesis of IBS involves a complex interplay of the following factors:
Altered...
392
Chronic Bowel Disorders: Introduction
541
Chronic bowel diseases are a group of long-term conditions affecting the digestive tract, characterized by inflammation and damage to the gut lining. These conditions primarily include irritable bowel syndrome and inflammatory bowel disease.
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
541
Gastritis-II: Pathophysiology
558
Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
558
Inflammatory Bowel Disease II: Crohn's Disease
390
Introduction
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...
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...
390
Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors
583
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.
583

