人类胰腺小岛内表观遗传变化的基因会影响线粒体功能,胰岛素分泌和2型糖尿病
Tina Rönn1, Jones K Ofori1, Alexander Perfilyev1
1Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Scania University Hospital, Malmö, Sweden.
Nature communications
|December 12, 2023
概括
胰腺小岛的表观遗传变化与2型糖尿病 (T2D) 有关. DNA甲基化变化影响胰岛素分泌和线粒体功能,这表明在T2D发育中发挥了作用.
科学领域:
- 内分泌学 在内分泌学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 代谢疾病 代谢疾病
背景情况:
- 表观遗传失调与疾病进展有关.
- 了解胰腺小岛的表观遗传变化对于2型糖尿病 (T2D) 研究至关重要.
研究的目的:
- 调查人类胰腺小岛的表观遗传变化是否会影响胰岛素分泌,并与T2D相关.
- 确定受这些表观遗传变化影响的特定基因和途径.
主要方法:
- 从T2D病例和对照中对人类胰腺小岛进行DNA甲基化分析.
- 对甲基化部位与HbA1c水平的相关性分析.
- 对T2D相关甲基化区域的基因表达分析.
- 在人类β细胞和糖尿病老鼠模型中对RHOT1的功能研究.
- 对血液中RHOT1甲基化的分析,用于T2D预测.
主要成果:
- 在T2D岛屿中,有5,584个DNA甲基化位点被改变,与HbA1c相关.
- 与T2D相关的甲基化变化发生在增强剂和β细胞转录因子结合区域,减少基因表达 (例如,RHOT1).
- 在β细胞中RHOT1缺乏会损害胰岛素分泌,线粒体功能,并改变代谢物概况.
- 糖尿病GK老鼠小岛显示RHOT1缺乏,血液RHOT1甲基化预测了未来的T2D.
结论:
- 患有T2D的个体在胰腺小岛上表现出表观遗传变化,与线粒体功能障碍有关.
- RHOT1是胰腺β细胞中胰岛素分泌和线粒体动态的关键调节者.
- 表观遗传修饰,特别是涉及RHOT1,代表了T2D的潜在生物标志物和治疗标.
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