发现有选择性蛋白质分解向的奇米拉降解剂,向PTP1B作为长期低血糖剂
Zunhua Yang1, Yuqi Ying1, Shaobing Cheng2
1College of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang 330004, China.
Journal of medicinal chemistry
|May 1, 2024
概括
针对蛋白质分解的嵌合体 (PROTACs) 有效地降解PTP1B,这是2型糖尿病的关键目标. 化合物75显示出强有力的和选择性的PTP1B降解,显示出长效抗糖尿病疗法的前景.
科学领域:
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
- 分子生物学分子生物学
背景情况:
- 蛋白氨酸酸酶1B (PTP1B) 是2型糖尿病治疗的验证标.
- 向蛋白质溶解的嵌合体 (PROTACs) 为向蛋白质降解提供了一个新的治疗策略.
研究的目的:
- 为潜在的抗糖尿病应用设计和评估针对PTP1B的双功能PROTAC.
- 为了研究PROTAC介导的PTP1B降解的疗效和选择性.
主要方法:
- 新型 PROTACs 的综合和描述.
- 对于PTP1B降解的西方斑点分析.
- 在体外测试以评估目标参与和选择性.
- 在体内口服葡萄糖耐受性测试.
- 下游信号通路的分析 (IRS-1/PI3K/Akt).
主要成果:
- 在PROTAC中,以剂量依赖的方式显示出显著的PTP1B降解.
- 化合物75具有较长的PEG连接器,表现出强烈的降解活性 (分别在48h和72h时DC50值为250nM和50nM).
- 化合物75通过ubiquitination和蛋白酶依赖途径选择性降解PTP1B.
- 化合物75在口服葡萄糖耐受性测试中显著降低了血糖水平,并激活了HepG2细胞中的关键胰岛素信号通路.
结论:
- PROTACs是降解PTP1B的有效工具,这是2型糖尿病的一个有希望的目标.
- 化合物75是一种强效和选择性的PTP1B向PROTAC,具有长期抗糖尿病治疗的潜力.
- 针对PTP1B的PROTACs的进一步开发可能会导致管理2型糖尿病的新型治疗策略.
相关概念视频
Glucagon-like Receptor Agonists
319
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...
319
Oral Hypoglycemic Agents: Glinides
154
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...
154
Oral Hypoglycemic Agents: Biguanides and Glitazones
192
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...
192
Dipeptidyl Peptidase 4 Inhibitors
181
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...
181
Hypoglycemia and Glucagon
257
Without prolonged fasting, healthy individuals maintain blood glucose levels above 3.5 mM due to a well-adapted neuroendocrine counterregulatory system that effectively prevents acute hypoglycemia, a potentially life-threatening condition. The primary clinical scenarios for hypoglycemia encompass diabetes treatment, inappropriate production of endogenous insulin or insulin-like substances by tumors, and the use of glucose-lowering agents in non-diabetic individuals. Notably, hypoglycemia in the...
257
Oral Hypoglycemic Agents: α-Glucosidase Inhibitors
174
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...
174


