与智力障碍相关的O-GlcNAc转移酶致病变体影响多能干细胞自我更新
Michaela Omelková1, Christina Dühring Fenger2,3, Marta Murray1
1Division of Molecular, Cell and Developmental Biology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK.
Disease models & mechanisms
|June 19, 2023
概括
与O相关的β-N-乙糖胺 (O-GlcNAc) 转移酶 (OGT) 的遗传变异导致OGT-CDG,这是一种与智力障碍相关的疾病. 一种新型的OGT变种破坏了干细胞的自我更新,为发育原因提供了洞察力.
科学领域:
- 生物化学 生化学
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
背景情况:
- 与O相关的β-N-乙糖胺 (O-GlcNAc) 转移酶 (OGT) 对于蛋白质修饰至关重要.
- 在OGT的遗传变异导致OGT-CDG,糖化的一种先天性疾病.
- OGT-CDG与X相关的智力障碍 (XLID) 和发育迟缓有关.
研究的目的:
- 研究一种新型OGT遗传变异 (OGTC921Y) 的功能影响.
- 探索OGT-CDG与胚胎干细胞自我更新之间的联系.
- 为了解OGT-CDG的发育病因学奠定基础.
主要方法:
- 对OGTC921Y变异与XLID和发作的同分离分析.
- 评估OGTC921Y变种的催化活性.
- 在携带该变体的小鼠胚胎干细胞中评估蛋白质O-GlcNAcylation水平.
主要成果:
- 这种OGTC921Y变异与XLID和发作共同分离.
- OGTC921Y变种导致OGT催化活性丧失.
- 具有OGTC921Y的小鼠胚胎干细胞显示O-GlcNAcylation,Oct4,Sox2和ALP水平降低,表明自我更新受损.
结论:
- OGTC921Y变种破坏了OGT功能,并与XLID和有关.
- 在OGT-CDG的发病过程中,胚胎干细胞自我更新受损.
- 这项研究为进一步研究OGT-CDG的发展方面提供了基础.
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