从小岛巨细胞中FFAR4介导的IL-6释放促进胰岛素分泌,并且在2型糖尿病中受到影响
Xinyi Chen1, Jingchen Shao1, Isabell Brandenburger1
1Max Planck Institute for Heart and Lung Research, Department of Pharmacology, Bad Nauheim, Germany.
Nature communications
|April 10, 2025
概括
岛屿巨细胞激活FFAR4释放IL-6,促进葡萄糖刺激胰岛素分泌 (GSIS). 这一途径在肥胖和2型糖尿病中受损,这表明FFAR4的重新激活是治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢性疾病 代谢性疾病
- 内分泌学 在内分泌学.
背景情况:
- 岛屿巨细胞在调节胰岛素分泌中的作用仍然在很大程度上是未知的.
- 现有知识表明,巨细胞在瘦肉状态下影响葡萄糖刺激胰岛素分泌 (GSIS),但确切的机制尚不清楚.
研究的目的:
- 阐明岛屿巨细胞调节GSIS的机制.
- 研究FFAR4和IL-6在小岛巨功能中的作用.
- 为了确定这种机制是否在肥胖和2型糖尿病中发生变化.
主要方法:
- 研究了FFAR4对小岛巨细胞的激活及其下游影响.
- 测量中白素-6 (IL-6) 释放及其对β细胞功能的影响.
- 在瘦小鼠,肥胖小鼠和患有肥胖和2型糖尿病的人类小岛中比较了这些机制.
主要成果:
- 在小岛巨细胞上FFAR4的激活刺激IL-6的释放,从而增强了瘦肉的雄性小鼠中的β细胞功能和GSIS.
- 这种FFAR4介导的IL-6通路在肥胖个体和肥胖的2型糖尿病小鼠的小岛中受损.
- 肥胖小鼠的巨细胞中FFAR4信号的减少导致IL-6释放的减少,但IL-6治疗在改善GSIS方面仍然有效.
结论:
- 通过FFAR4介导的小岛巨激活的缺陷导致2型糖尿病中GSIS受损.
- 重新激活小岛巨细胞FFAR4或促进IL-6的释放可能是2型糖尿病的治疗策略.
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