三甲基胺N-氧化物损害β细胞功能和葡萄糖耐受性
Lijuan Kong1,2,3, Qijin Zhao1,2,3, Xiaojing Jiang1,2,3
1State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Nature communications
|March 22, 2024
概括
三甲基胺N氧化物 (TMAO) 损害了葡萄糖刺激的胰岛素分泌和β细胞功能,导致2型糖尿病. 抑制TMAO的产生可能为糖尿病管理提供新的治疗策略.
科学领域:
- 内分泌学 在内分泌学.
- 代谢疾病 代谢疾病
- 分子生物学分子生物学
背景情况:
- 贝塔细胞功能障碍和损失是2型糖尿病 (T2D) 的关键特征.
- 在糖尿病患者中观察到高水平的三甲基胺N氧化物 (TMAO).
- TMAO对β细胞功能的直接影响需要进一步阐明.
研究的目的:
- 调查TMAO对β细胞功能和活力的直接影响.
- 探索TMAO影响β细胞功能的机制.
- 评估抑制TMAO在T2D中的产生治疗潜力.
主要方法:
- 使用MIN6细胞和原始人/小鼠小岛的体外研究.
- 在体内对雄性C57BL/6J小鼠,db/db小鼠和食胆的小鼠进行了体内研究.
- 评估葡萄糖刺激胰岛素分泌 (GSIS),β细胞比例,耐葡萄糖,过渡性,ER压力和亡.
主要成果:
- 在体外和体内,TMAO显著降低了GSIS,并损害了β细胞功能.
- 通过NLRP3炎症酶相关的细胞因子,TMAO抑制了过渡性,并诱导了Serca2损失.
- TMAO促进了β细胞的ER压力,脱差,亡,并抑制了转录性身份.
- 抑制TMAO生产改善了β细胞功能障碍和改善了葡萄糖耐受性.
结论:
- TMAO直接影响β细胞的功能和生存,从而导致T2D的发病.
- TMAO通过涉及信号,Serca2和ER压力的机制发挥其有害作用.
- 抑制TMAO的产生是T2D治疗的一个有希望的治疗途径.
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