IGFBP7在T2D捐赠者的小岛上升调,并减少胰岛素分泌
Efraim Westholm1,2, Alexandros Karagiannopoulos1,2, Nicole Kattner3
1Islet Cell Exocytosis, Lund University Diabetes Centre (LUDC), Department of Clinical Sciences-Malmö, Lund University, Malmö, Sweden.
iScience
|September 16, 2024
概括
胰岛素样生长因子结合蛋白7 (IGFBP7) 损害了2型糖尿病 (T2D) 的胰岛素分泌. 减少T2D岛屿中的IGFBP7改善了胰岛素分泌,表明IGFBP7是潜在的治疗点.
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:
- 岛内交叉对了解胰岛素分泌调节和2型糖尿病 (T2D) 发病过程至关重要.
- 功能失调的β细胞功能是T2D的一个标志.
- 特定蛋白质在自克林和克林β细胞调节中的作用需要进一步阐明.
研究的目的:
- 研究胰岛素样生长因子结合蛋白7 (IGFBP7) 在β细胞功能中的作用及其在T2D中的潜在参与.
- 探索IGFBP7对胰岛素分泌和细胞能量代谢的作用机制.
主要方法:
- 在人类胰腺小岛中检测IGFBP7的免疫组织化学分析.
- 在T2D样本中测量IGFBP7的基因表达和蛋白质水平.
- 使用人类小岛和EndoC-βH1细胞进行体外研究,以评估IGFBP7对胰岛素分泌,氧气消耗和ATP产生的影响.
- 通过细胞系和T2D捐赠小岛的敲除来对IGFBP7水平进行实验性操纵.
主要成果:
- 在人类α和β细胞颗粒中检测到IGFBP7.
- 在T2D中观察到IGFBP7基因和蛋白质表达的升高.
- 用IGFBP7化减少了人体小岛和EndoC-βH1细胞中的胰岛素分泌,氧气消耗和ATP生产.
- 在EndoC-βH1细胞和T2D岛屿中抑制IGFBP7,恢复了胰岛素分泌.
结论:
- IGFBP7在自克林和克林β细胞调节中发挥作用.
- 高水平的IGFBP7通过减少p21激活激酶1 (PAK1) 和细胞能量生产,导致T2D中的胰岛素分泌受损.
- 抑制IGFBP7是T2D的潜在治疗策略.
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