DRAK2通过在Ser56中酸化ULK1来抑制自,从而在过度营养时降低胰腺β细胞功能
Yuting Lu1, Junyu Xu1,2, Yufeng Li1
1State Key Laboratory of Drug Research, the National Center for Drug Screening, Shanghai Institute of Materia Medica, Chinese Academy of Sciences. Shanghai, 201203, P. R. China.
Science translational medicine
|February 7, 2024
概括
与DAP相关的亡诱导激酶-2 (DRAK2) 在2型糖尿病中被上调,损害胰腺β细胞功能. 抑制DRAK2通过维持自和线粒体功能来保护β细胞,提供潜在的治疗点.
科学领域:
- 细胞生物学 细胞生物学
- 代谢疾病 代谢疾病
- 内分泌学 在内分泌学.
背景情况:
- 损伤的自促使胰腺β细胞功能障碍和2型糖尿病 (T2D) 中的亡.
- 与DAP相关的亡诱导激酶-2 (DRAK2) 是亡的一个关键调节剂.
- DRAK2在T2D相关β细胞功能障碍中的作用尚不清楚.
研究的目的:
- 研究DRAK2在T2D期间胰腺β细胞功能中的作用.
- 阐明DRAK2影响β细胞功能和自的分子机制.
主要方法:
- 从T2D模型对人类,和老鼠胰腺组织DRAK2表达的分析.
- 在小鼠胰腺β细胞中条件淘汰DRAK2.
- 孤立的小鼠岛屿的蛋白组分析.
- 在初级小岛和β细胞系中进行细胞和生化分析 (Min6,INS-1E).
主要成果:
- 在患有T2D的个体的胰腺组织中,DRAK2的调节显著上升.
- 贝塔细胞中的DRAK2缺陷可以防止高脂肪饮食引起的功能障碍,保持自和线粒体功能.
- DRAK2在Ser56中直接酸化ULK1,导致ULK1无处不在和抑制自.
- 在脂毒性条件下,ULK1-S56A突变或DRAK2抑制可以挽救线粒体功能和胰岛素分泌.
结论:
- 在代谢压力下,DRAK2-ULK1信号轴在调节胰腺β细胞功能方面发挥着至关重要的作用.
- 准DRAK2为保护β细胞和管理T2D提供了一个有希望的治疗策略.
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