Cyb5r3的激活可以挽救二次的硫基尿素失效,但不能挽救β细胞脱差
Hitoshi Watanabe1,2, Shun-Ichiro Asahara1,2,3, Jinsook Son1,2
1Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, United States of America.
PloS one
|February 9, 2024
概括
治疗糖尿病的硫尿素 (SU) 会导致二次失效,这与β细胞脱差有关. 虽然Cyb5r3激活可以改善胰岛素分泌,但它不能逆转这种脱差过程.
科学领域:
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
- 代谢疾病 代谢疾病
背景情况:
- 糖尿病涉及胰岛素抵抗和β细胞衰竭,其特点是胰岛素分泌和分离受损.
- 硫尿素 (SU) 药物可以改善胰岛素分泌,但往往会导致二次失效.
- 苏联二次性衰竭与β细胞脱分之间的联系尚不清楚.
研究的目的:
- 调查SU二次衰竭与β细胞脱差之间的关联.
- 探索氧化还原酶Cyb5r3在SU衰竭和β细胞功能中的作用.
- 确定Cyb5r3激活是否可以减轻SU二次失效和β细胞脱差.
主要方法:
- 使用了SU二次故障的小鼠模型.
- 检查了Cyb5r3淘汰赛小鼠的β细胞脱差,这些小鼠在长期的SU给药,高脂肪饮食和衰老下进行了测试.
- 评估了Cyb5r3激活剂对胰岛素分泌和β细胞脱差的影响.
主要成果:
- 苏二次失败与β细胞部分脱差有关.
- 在Cyb5r3淘汰赛中,小鼠表现出加剧的β细胞分化和葡萄糖不耐受.
- Cyb5r3激活剂改善了慢性胰岛素治疗损害的胰岛素分泌,但没有逆转β细胞脱差.
结论:
- 慢性 SU 的使用有助于β细胞脱差的进展.
- Cyb5r3在调解SU失败方面发挥着作用,但其激活并不能恢复分离的β细胞.
- Cyb5r3的激活可以通过改善胰岛素分泌来逆转SU的二次衰竭,而不必逆转β细胞分化.
相关概念视频
Oral Hypoglycemic Agents: Sulfonylureas
208
Sulfonylureas are oral hypoglycemic agents utilized in treating type 2 diabetes. They are characterized by their unique sulfonylurea chemical structure. The family of sulfonylureas is divided into generations. First-generation sulfonylureas, including tolbutamide (Orinase), chlorpropamide (Diabinese), and tolazamide (Tolinase), trigger insulin release from pancreatic β cells and enhance peripheral tissues' insulin sensitivity. The second-generation members, such as glipizide...
208
Oral Hypoglycemic Agents: Biguanides and Glitazones
201
Biguanides, particularly metformin (Glucophage), are insulin sensitizers that enhance glucose uptake, thereby reducing insulin resistance. Unlike sulfonylureas, metformin doesn't prompt insulin secretion, which helps to curb hypoglycemia risk. Metformin is beneficial in treating conditions like polycystic ovary syndrome due to its insulin-resistance reduction capability. The drug's primary action involves curtailing hepatic gluconeogenesis, a significant contributor to high blood...
201
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
Carbohydrate Metabolism
11.1K
Carbohydrates are polymers composed of molecules containing atoms of carbon, hydrogen and oxygen. One gram of carbohydrate can provide four kilo-calories of energy, which makes it the most efficient instant energy source.
Starch accounts for approximately 60% of the carbohydrates consumed by humans. Since amylase enzymes cannot function in the stomach's acidic environment, starch can only be digested in the mouth and small intestine. Simple sugars are found naturally in milk and fruits in...
Starch accounts for approximately 60% of the carbohydrates consumed by humans. Since amylase enzymes cannot function in the stomach's acidic environment, starch can only be digested in the mouth and small intestine. Simple sugars are found naturally in milk and fruits in...
11.1K
Insulin: Biosynthesis, Chemistry, and Preparation
377
The endoplasmic reticulum (ER) of pancreatic β-cells synthesizes preproinsulin, which consists of a signal peptide, A and B chains, and a C-peptide. Preproinsulin is then cleaved and folded into proinsulin, which translocates to the Golgi apparatus for sorting and packaging into secretory granules. In these granules, enzymatic clipping generates insulin and C-peptide.
Damage or functional impairment of β-cells inhibits insulin production, leading to diabetes. Diabetes treatment...
Damage or functional impairment of β-cells inhibits insulin production, leading to diabetes. Diabetes treatment...
377
Diabetes Mellitus: Overview and Type I Subtype
2.6K
Diabetes mellitus is a chronic metabolic disorder characterized by high blood glucose levels due to inadequate insulin production, insulin resistance, or both. The condition affects millions worldwide and can significantly impact their health and quality of life.
Type 1 diabetes is an autoimmune disease in which the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, the body is unable to produce sufficient insulin, and individuals with...
Type 1 diabetes is an autoimmune disease in which the immune system mistakenly attacks and destroys the insulin-producing beta cells in the pancreas. As a result, the body is unable to produce sufficient insulin, and individuals with...
2.6K


