品尝葡萄糖会耗尽细胞内储量,并损害巨细胞的功能
Laura Schlautmann1, Daniel Burgdorf1, Shaunak Ghosh1
1Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany.
iScience
|November 17, 2025
概括
糖尿病患者的高血糖会通过破坏信号来损害巨细胞的功能. 巨细胞上的味觉受体感知高血糖,导致免疫细胞功能障碍和潜在的二次疾病.
科学领域:
- 免疫学 免疫学 免疫学
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
背景情况:
- 高血糖是糖尿病的一个标志.
- 它有助于二次疾病的发展.
- 巨细胞功能障碍与糖尿病并发症有关.
研究的目的:
- 为了研究高血糖症对巨细胞激活和功能的影响.
- 识别导致葡萄糖引起的免疫细胞功能障碍背后的机制.
主要方法:
- 在高血糖条件下评估巨细胞激活和炎症性细胞因子生产.
- 测量了细胞内 (Ca2+) 水平和ER Ca2+储量.
- 研究了味觉受体和IP3受体/SERCA在葡萄糖介导的Ca2+失调中的作用.
- 与鼠类和人类队列中的味觉受体表达相关的Ca2+平衡.
主要成果:
- 高血糖症增强了巨细胞的炎症原始化.
- 增加的葡萄糖通过促进ER Ca2+释放,耗尽了细胞内Ca2+储存.
- 巨细胞上的味觉受体被确定为高血糖传感器,通过IP3受体激活和SERCA抑制调解Ca2+释放.
- 不调节的Ca2+稳态与味觉受体表达和高血糖相关.
- 葡萄糖诱导的Ca2+耗尽导致ER压力和受损的巨细胞迁移.
结论:
- 过高血糖症通过味觉受体激活来破坏巨细胞的Ca2+信号传递和平衡.
- 这种失调有助于改变巨细胞的功能,包括ER压力和迁移障碍.
- 这些发现阐明了味觉受体在免疫细胞对高血糖反应中的新型作用,为糖尿病相关的免疫功能障碍提供了见解.
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