缺少EOGT阻止了边缘零鼠标肠道缺陷的发展
bioRxiv : the preprint server for biology
|February 23, 2026
概括
改变肠道中的Fringe糖系转移酶活性会扰乱发育,增加杯状和帕内斯细胞. 然而,EOGT的缺失阻止了这些缺陷,揭示了EOGT的缺陷.
科学领域:
- 生物化学 生物化学
- 发育生物学 发展生物学
- 细胞生物学 细胞生物学
背景情况:
- 糖转移酶在细胞过程中起着至关重要的作用,了解它们的功能对于糖化先天性障碍至关重要.
- 缺口信号,对于发展至关重要,依赖于特定的O-甘氨酸在表皮生长因子 (EGF) 类似的重复上,被边缘酶和EOGT修改.
- 以前的研究将O-化缺陷与肠道发育问题联系起来.
研究的目的:
- 调查边缘葡萄糖转移酶 (LFNG,MFNG,RFNG) 和EOGT对肠道发育的影响.
- 为了确定单独或组合抑制边缘活动是否会影响肠道形态.
- 探索边缘酶和EOGT在调节肠道发育中的相互作用.
主要方法:
- 使用Villin-Cre. 在小鼠肠表皮中的边缘基因 (Lfng,Mfng,Rfng) 的条件基因删除.
- 产生结合Fringe基因失活和EOGT缺陷的小鼠.
- 肠道形态的分析,包括细胞类型组成 (杯子,帕内斯细胞) 和组织结构 (维卢斯长度,密室宽度).
主要成果:
- 单独删除Lfng或所有三个边缘基因的条件删除导致了缺陷的肠发育,其特征是杯子和帕内斯细胞增加,密室更宽,小更短.
- 意想不到的是,在缺乏EOGT的小鼠中,Fringe基因的失活并没有导致肠道发育缺陷.
- 缺少EOGT似乎可以保护肠道免受边缘基因失活的破坏性影响.
结论:
- 边缘葡萄糖转移酶对于正常的肠道发育至关重要.
- EOGT在调节肠道发育方面发挥着至关重要的,以前未被认可的作用,可能通过调节Fringe介导的O-糖化.
- 这些发现揭示了一个新的调节机制,涉及EOGT在肠道发育和Notch信号通路中的作用.
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