相关实验视频
Updated: Jan 17, 2026

09:36
Isolated Pancreatic Islet Treatment and Apoptosis Measurement
Published on: May 2, 2025
837
缺少SCAMP5触发胰腺β细胞分泌功能障碍和亡
Yingqi Zhang1,2, Donglan Tang1, Chenxi Yang1
1Shenzhen University Diabetes Institute, Shenzhen Key Laboratory of Metabolism and Cardiovascular Homeostasis, Shenzhen University Medical School, Shenzhen, 518060, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 15, 2025
概括
分泌载体膜蛋白5 (SCAMP5) 对于胰腺β细胞功能在2型糖尿病中至关重要. 降低SCAMP5会损害胰岛素分泌,并促进β细胞的亡,揭示了一个新的治疗点.
科学领域:
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 晚期2型糖尿病涉及β细胞功能障碍和亡.
- 驱动β细胞衰竭的机制仍然不完全理解.
- 在β细胞中分泌载体膜蛋白5 (SCAMP5) 的作用尚不清楚.
研究的目的:
- 为了研究SCAMP5在胰腺β细胞中的功能.
- 确定SCAMP5在糖尿病β细胞衰竭中的作用.
- 阐明SCAMP5在β细胞中的功能背后的分子机制.
主要方法:
- 在糖尿病患者中评估SCAMP5表达.
- 研究了SCAMP5缺乏对胰岛素分泌和亡的影响.
- 研究了SCAMP5与电压依赖离子通道1 (VDAC1) 的相互作用.
- 通过碳水化合物敏感元素结合蛋白 (ChREBP) 分析了SCAMP5的表观遗传调节.
主要成果:
- 在糖尿病β细胞中,SCAMP5的表达减少.
- 由于SCAMP5缺乏,胰岛素分泌通过减少CaV1.2表达而受损.
- SCAMP5通过抑制VDAC1-介导的细胞染色体c释放来防止β细胞亡.
- 由高血糖引起的ChREBP在表观遗传上抑制SCAMP5的表达.
结论:
- 在维护β细胞功能和生存方面,SCAMP5起着至关重要的作用.
- ChREBP-SCAMP5轴是糖尿病β细胞衰竭的一个关键途径.
- 准SCAMP5可能为2型糖尿病提供一种新的治疗策略.
相关概念视频
Insulin Secretory Vesicles
6.4K
Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...
6.4K
Glucose Homeostasis: Pancreatic Islets and Insulin Secretion
2.2K
The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are...
Insulin and C-peptide are...
2.2K
Chronic Pancreatitis I: Introduction
670
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...
670
Cell Specific Gene Expression
16.3K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
16.3K
Caspases
13.7K
Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside...
13.7K
Cells and Secretions of the Pancreas
4.4K
The pancreas, a vital organ within the abdominal cavity, plays dual roles in the digestive and endocrine systems, collaborating with exocrine and endocrine cells to maintain optimal digestion and blood sugar levels.
Exocrine function is carried out by acinar cells, organized into clusters known as acini. These cells contribute to digestion by releasing substantial quantities of enzyme-rich, alkaline digestive juices.
Concurrently, the dispersed clusters of endocrine cells throughout the...
Exocrine function is carried out by acinar cells, organized into clusters known as acini. These cells contribute to digestion by releasing substantial quantities of enzyme-rich, alkaline digestive juices.
Concurrently, the dispersed clusters of endocrine cells throughout the...
4.4K

