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高度糖化终端产品的α细胞受体与1型糖尿病中葡萄糖的表达有关
Sherman S Leung1,2,3,4, Nataliya Lenchik5, Clayton Mathews5
1Glycation and Diabetes Complications, Mater Research Institute, Translational Research Institute (TRI), The University of Queensland (MRI-UQ), 37 Kent Street, Woolloongabba, Brisbane, QLD, 4102, Australia.
Scientific reports
|August 9, 2023
概括
1型糖尿病的低血糖与胰腺α细胞的变化有关,这些细胞表达了高级糖化终产品 (RAGE) 的受体. 这项研究发现RAGE及其途径与1型糖尿病岛屿的葡萄糖水平有关.
科学领域:
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
- 糖尿病研究 糖尿病研究
背景情况:
- 低血糖是1型糖尿病 (T1D) 的常见并发症.
- 胰腺α细胞对葡萄糖调节至关重要,表达高级糖化终产品 (RAGE) 的受体.
- 在T1D中改变RAGE表达可能会影响α细胞功能和葡萄糖平衡.
研究的目的:
- 调查岛屿RAGE表达与1型糖尿病患者和没有1型糖尿病患者的葡萄糖水平之间的关联.
- 在T1D的背景下,探索RAGE信号通路和α细胞功能之间的关系.
- 确定RAGE是否在T1D患者体验的低血糖症中起作用.
主要方法:
- 使用激光剖析和RNA生物信息学,在没有糖尿病,有T1D风险的捐赠者和T1D的捐赠者中比较小岛RAGE基因 (AGER) 表达.
- 通过共聚焦显微镜评估胰腺组织中的RAGE,其连接物和信号分子.
- 应用随机森林机器学习和通用线性模型来分析基因表达数据.
主要成果:
- 来自T1D捐赠者的岛屿显示了AGER和相关基因的差异表达,受葡萄糖水平的影响.
- 确定AGER是岛屿葡萄糖水平的最重要的预测因素.
- 葡萄糖的表达可以通过RAGE信号分子,配体和相关酶的表达来预测.
- 混焦成像证实了RAGE及其相关分子在α细胞内的同定位.
- 在一组T1D患者中观察到葡萄糖和RAGE之间的反向关系,特别是青少年和有过低血糖史的人.
结论:
- 在1型糖尿病中,葡萄糖和小岛RAGE,其连接物和信号通路之间确实存在关联.
- 这些发现表明RAGE在T1D中低血糖症的病理生理学中可能发挥作用.
- 需要进一步的功能研究来阐明RAGE在T1D相关低血糖症中的确切作用.
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