内源GIP信号传递对于DPP-4抑制剂介导的小鼠代谢控制是不可或缺的
Saki Kubota-Okamoto1,2, Sodai Kubota1,2, Hiromi Tsuchida1
1Department of Diabetes, Endocrinology and Metabolism and Department of Rheumatology and Clinical Immunology, Gifu University Graduate School of Medicine, Gifu, Japan.
Journal of diabetes investigation
|February 3, 2026
概括
双基化酶-4 (DPP-4) 抑制剂需要依赖葡萄糖的胰岛素性多 (GIP) 信号来降低葡萄糖和抗肥胖作用. 单独使用类似葡萄糖-1 (GLP-1) 不能弥补GIP受体功能的缺失.
科学领域:
- 代谢内分泌学代谢内分泌学
- 隐形生物学 隐形生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 双基化酶-4 (DPP-4) 抑制剂会增加活性隐素水平,但依赖葡萄糖的胰岛素型多 (GIP) 在它们的代谢效益中的作用尚不清楚.
- 葡萄糖类-1 (GLP-1) 是主要的焦点,但最近的证据强调了GIP的生理重要性.
- 了解GIP的贡献对于优化DPP-4抑制剂疗法至关重要.
研究的目的:
- 为了确定内源GIP信号是否对于DPP-4抑制剂的降糖和抗肥胖作用至关重要.
- 研究GLP-1在GIP信号缺失时的补偿作用.
- 阐明DPP-4抑制剂作用的机制基础.
主要方法:
- 雄性GIP受体淘汰赛 (Gipr-/-) 和野生型 (Gipr+/+) 小鼠在正常或高脂肪饮食 (HFD) 上接受DPP-4抑制剂 (阿纳格利普丁或林格利普丁) 治疗.
- 评估结果包括葡萄糖耐受性,胰岛素分泌,隐素水平,体重和脂肪.
- 通过使用杜拉格卢提德,GLP-1受体的功能得到了确认.
主要成果:
- 抑制DPP-4改善了葡萄糖耐受性,并减少了HFD野生型小鼠的体重增加,但这些效应在Gipr-/-小鼠中消失了.
- 尽管完整的GIP和GLP-1的增加相似,但Gipr-/-小鼠没有从DPP-4抑制中受益.
- 虽然DPP-4抑制剂在野生型小鼠中改善了胰岛素分泌和降低了葡萄糖,但在Gipr-/-小鼠中却没有;然而,杜拉格胺在Gipr-/-小鼠中使葡萄糖水平正常化,证实了完整的GLP-1信号传递.
结论:
- 内源GIP信号对于小鼠DPP-4抑制剂的降糖和抗肥胖作用是不可或缺的.
- 当GIP信号不足时,单独提高GLP-1水平不足以复制充分的代谢益处.
- 这些发现强调了GIP的关键生理作用,并表明了取决于环境的基蛋白作用.
相关概念视频
01:23Dipeptidyl Peptidase 4 Inhibitors
669
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...
669
00:52What is Metabolism?
131.8K
Overview
131.8K
01:52Eukaryotic Transcription Inhibitors
11.0K
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
11.0K
01:21Paracrine Signaling
59.6K
Paracrine signaling allows cells to communicate with their immediate neighbors via secretion of signaling molecules. Such a signal can only trigger a response in nearby target cells because the signal molecules degrade quickly or are inactivated if not taken up. Prominent examples of paracrine signaling include nitric oxide signaling in blood vessels, synaptic signaling of neurons, the blood clotting system, tissue repair/wound healing, and local allergic skin reactions. Nitric oxide as a...
59.6K
01:39Receptor-mediated Endocytosis
110.9K
Overview
110.9K
01:26Healthcare Associated Infections I: Iatrogenic, Exogenic and Endogenic
5.5K
Healthcare-associated infections (HAIs) occur in a healthcare facility while a person receives care for another ailment. This category also includes work-related infections among healthcare staff.
HAIs significantly increase the cost of health care. Extended stays in healthcare institutions, increased disability, increased costs of medications, including specialized antibiotics, and prolonged recovery times add to the patient's expenses and the healthcare institution and funding bodies.
HAIs significantly increase the cost of health care. Extended stays in healthcare institutions, increased disability, increased costs of medications, including specialized antibiotics, and prolonged recovery times add to the patient's expenses and the healthcare institution and funding bodies.
5.5K