相关实验视频
Updated: Jul 11, 2025

08:18
A Model of Chronic Nutrient Infusion in the Rat
Published on: August 14, 2013
12.8K
胰腺GLUT2蛋白表达和孤立的岛屿胰岛素分泌量在高脂肪养的老鼠中下降
Roxana Karbaschi1,2, Homeira Zardooz2,3
1Faculty of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Journal of diabetes and metabolic disorders
|November 17, 2023
概括
在Wistar大鼠中长期高脂肪饮食会损害葡萄糖代谢和胰岛素分泌. 这项研究表明,高脂肪食降低了胰腺葡萄糖转运体-2 (GLUT2) 的表达,导致女性的葡萄糖不耐受和胰岛素抵抗.
科学领域:
- 代谢研究的研究.
- 内分泌学 在内分泌学.
- 营养科学 营养科学
背景情况:
- 繁殖期间的慢性高脂肪 (HF) 消费会破坏母亲的新陈代谢平衡,并对妊娠结果产生负面影响.
- 了解母亲饮食对代谢健康的影响,对于后代的发育和长期健康至关重要.
研究的目的:
- 为了研究长期HF养对胰腺葡萄糖转运体-2 (GLUT2) 蛋白质表达的影响.
- 评估HF饮食对Wistar老鼠大中孤立小岛的葡萄糖刺激胰岛素分泌的影响.
主要方法:
- 雌性Wistar大鼠被养正常 (N) 或HF饮食10周,涵盖怀孕前到哺乳期.
- 评估了空腹血葡萄糖,胰岛素,HOMA-IR指数,并进行了腹腔内葡萄糖耐受性测试 (IPGTT).
- 在基底和高葡萄糖条件下,评估胰腺GLUT2蛋白表达和孤立小岛的胰岛素分泌.
主要成果:
- 养HF的母体表现出快速胰岛素和HOMA-IR指数的增加,这表明胰岛素抵抗.
- 在HF养的老鼠中,IPGTT显示葡萄糖耐受性受损.
- 胰腺GLUT2表达和来自孤立岛屿的葡萄糖刺激胰岛素分泌在HF组显著降低.
结论:
- 在生殖期间慢性HF消费会诱导母体的葡萄糖不耐受性和胰岛素抵抗性.
- 胰腺GLUT2表达受损和胰岛素分泌减少有助于代谢功能障碍.
- 在关键的生殖期,母亲的饮食成分需要仔细监测,以保持代谢平衡.
相关概念视频
Glucose Homeostasis: Pancreatic Islets and Insulin Secretion
1.3K
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...
1.3K
Insulin Secretory Vesicles
5.0K
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...
5.0K
Hormones Regulating Blood Glucose
3.4K
Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
In addition to accelerating glucose uptake and utilization, insulin has...
In addition to accelerating glucose uptake and utilization, insulin has...
3.4K

