在糖尿病小鼠中,西塔利普丁通过激活Nrf2-SLC7A11-GPX4轴来抑制神经元铁亡,以缓解认知功能障碍
Han Meng1, Zhaoyu Xie2, Tao Xu2
1Department of Pharmacology, Wannan Medical College, Wuhu 241002, China; Anhui Innovative Center for Drug Basic Research of Metabolic Diseases, Wannan Medical College, Wuhu 241002, China.
International immunopharmacology
|October 16, 2025
概括
乙型糖尿病药物西塔格利普丁通过Nrf2通路预防脑细胞死亡 (神经元铁亡),改善了糖尿病小鼠的记忆和学习.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 糖尿病认知功能障碍 (DCD) 是2型糖尿病 (T2DM) 的严重并发症,治疗选择有限.
- 在DDC中,dpp-4抑制剂西塔利普丁的神经保护机制尚未完全理解.
研究的目的:
- 研究西塔利普丁在糖尿病认知功能障碍中的神经保护作用和潜在机制.
- 探索西塔利普丁对神经元铁亡及其通过Nrf2通路调节的影响.
主要方法:
- 研究了西塔格利普丁对糖尿病小鼠的影响,包括葡萄糖水平,体重,胰岛素抵抗和认知功能.
- 在实验室中使用高葡萄糖/棕酸刺激的神经元和PC12细胞研究了西塔格利普丁对神经元铁亡的影响.
- 利用分子对接,细胞热转移分析和基因操纵 (Nrf2 siRNA/过度表达) 来阐明作用机制.
主要成果:
- 西塔利普丁改善了血糖控制,降低了胰岛素抵抗,改善了糖尿病小鼠的学习和记忆缺陷.
- 西塔格利普丁通过减少氧化应激标志物和增加抗氧化剂水平来抑制神经元铁亡.
- 西塔利普丁直接结合并增强Nrf2表达,这调节SLC7A11-GPX4轴,从而抑制铁灭.
结论:
- 西塔格利普丁显示出糖尿病认知功能障碍的治疗潜力.
- 该机制涉及西塔格利普丁诱导的Nrf2激活,导致神经元铁亡的抑制和随后的认知改善.
相关概念视频
Dipeptidyl Peptidase 4 Inhibitors
581
Dipeptidyl peptidase 4 (DPP-4) is a serine protease widely distributed in the body. It's involved in the inactivation of GLP-1 and GIP hormones, which are crucial for insulin regulation. DPP-4 inhibitors, such as sitagliptin (Januvia), saxagliptin (Onglyza), linagliptin (Tradjenta), alogliptin (Nesina), and vildagliptin (Galvus), help increase the proportion of active GLP-1, enhancing insulin secretion. These inhibitors work by competitively binding to DPP-4. This binding causes a...
581
Oral Hypoglycemic Agents: Glinides
595
Repaglinide (Prandin) and Nateglinide (Starlix), known as glinides, are oral insulin secretagogues that stimulate insulin release from pancreatic β cells by closing the ATP-sensitive potassium channels (KATP channel). Repaglinide controls insulin release from pancreatic β cells by managing potassium efflux. It shares two binding sites with sulfonylureas and also has a unique site, indicating overlapping mechanisms of action. With a rapid onset and a 4-7 hour duration, it effectively...
595
Oral Hypoglycemic Agents: Biguanides and Glitazones
582
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...
582
Oral Hypoglycemic Agents: α-Glucosidase Inhibitors
522
α-glucosidase inhibitors, including acarbose (Precose), miglitol (Glyset), and voglibose (Voglib) (primarily available in Asia), are drugs that control blood sugar levels by delaying the digestion of starch and disaccharides. They achieve this by inhibiting α-glucosidase enzymes in the intestine, which slow the absorption of carbohydrates in the intestine, which in turn leads to a prolonged release of the glucoregulatory hormone GLP-1 from intestinal L-cells.
Acarbose and miglitol are...
Acarbose and miglitol are...
522
Glucagon-like Receptor Agonists
840
Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by...
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by...
840

