爬行脂肪衍生的自由脂肪酸诱导肠道肌肉肌肉细胞的激增:克罗恩病中脂肪和肠道狭窄形成之间的新联系
Weiwei Liu1, Ren Mao2, Thi Hong Nga Le1
1Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio.
Gastroenterology
|November 10, 2024
概括
克罗恩病的"爬行脂肪"通过释放刺激光滑肌肉细胞生长的脂肪酸来促进肠道加厚. 这一发现揭示了一种新的机制,有助于克罗恩病中狭窄形成.
科学领域:
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 包裹肠壁的中肠脂肪,称为肠壁的中肠脂肪.
研究的目的:
- 研究爬行脂肪的因素及其对人类肠道光滑肌肉细胞增生的影响.
- 阐明爬行脂肪在与克罗恩病狭窄相关的肌肉本身 (MP) 加厚中的作用.
主要方法:
- 脂质质谱测量用于量化中肠脂肪中的自由脂肪酸 (FFAs).
- 暴露于FFAs的人类初级肠滑肌细胞 (HIMCs),以评估增殖.
- 细胞内FFA代谢和活性氧物种的功能评估.
- 在大肠炎和脂肪缺失的小鼠模型中研究肌肉厚度.
主要成果:
- 爬行脂肪与显著加厚的MP有关.
- 实验性脂肪删除减少了MP厚度.
- 爬行脂肪释放的长链FFA水平增加,特别是棕酸盐.
- 抑制FFA代谢或线粒体吸收减少了palmitate诱导的HIMC扩散.
- 阻止棕酸盐转化为脂降低了HIMC的扩散.
结论:
- 由爬行脂肪释放的长链FFA刺激HIMCs中的特定的增殖反应.
- 爬行脂肪被确定为一种新的因素,有助于克罗恩病中狭窄形成.
相关概念视频
Inflammatory Bowel Disease II: Crohn's Disease
186
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...
186
Chronic Pancreatitis I: Introduction
72
The pancreas, an elongated and flat gland situated behind the stomach, serves a vital function in digesting food and managing blood sugar levels.
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...
Pancreatitis is the inflammation of the pancreas, which occurs when the immune system becomes active and causes swelling, pain, and disruptions in organ function. Pancreatitis can manifest as either an acute or chronic condition.
Acute pancreatitis arises suddenly and lasts for a brief duration, while chronic pancreatitis is a long-term affliction...
72
Chronic Bowel Disorders: Introduction
389
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...
389
Inflammatory Bowel Disease III: Diagnostic Studies and Management I-Nutritional Therapy
319
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...
319
Renewal of Intestinal Stem Cells
2.5K
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...
2.5K
Inflammation
52.8K
Overview
52.8K


