麦克/乳糖胺调节肠道平衡和分泌细胞命运承诺,通过促进Notch信号传递
Kebei Tang1,2, Xuewen Li1, Jiulong Hu1,3,4
1National Institute of Biological Sciences, Beijing, China.
eLife
|December 23, 2025
概括
葡萄糖脂 (GSL) 缺乏会损害德尔塔突信号传递,导致多索菲拉的分泌细胞瘤. 这凸显了GLS在干细胞命运和组织平衡中的保留作用.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 德尔塔突出信号调节细胞在发育和组织平衡中的命运决策.
- 德罗斯菲拉和哺乳动物的肠干细胞依赖诺奇信号来进行分化.
- 控制精确细胞命运的Notch信号的机制尚不清楚.
研究的目的:
- 为了识别Drosophila肠道干细胞中Notch信号的新型调节者.
- 阐明将葡萄糖脂代谢与Notch信号连接起来的分子机制.
- 为了研究甘氨基脂在干细胞命运和瘤形成中的作用.
主要方法:
- 在Drosophila中进行前置基因选,以确定影响干细胞命运的突变.
- 糖脂合成途径的遗传分析.
- 在小鼠模型中进行代谢物救援实验和条件淘汰.
主要成果:
- 葡萄糖胺合成酶 (GlcT) 的突变导致分泌细胞瘤,原因是酸胺/乳糖胺的产生受损.
- 葡萄糖脂缺乏会损害Delta的内细胞循环,减少Notch信号传递.
- 哺乳动物正方体 (Ugcg) 的条件淘汰会导致小鼠的杯状细胞过度分化.
结论:
- 一种特定的葡萄糖脂代谢物对调节干细胞命运决定中的Notch信号至关重要.
- 这项研究揭示了胺代谢和Notch信号之间的进化保守联系.
- 这些发现提供了GSL新陈代谢,Notch信号传递,组织平衡和瘤形成之间的分子联系.
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