在肝脏中,HCF-1作为OGT功能和O-GlcNAcylation的关键调节剂
Vaibhav Kapuria1,2, Ayushma3, Winship Herr4
1Center for Integrative Genomics, University of Lausanne, Lausanne, 1015, Switzerland. vkapuria@ggn.amity.edu.
Scientific reports
|August 3, 2025
概括
肝细胞中宿主细胞因子-1 (HCF-1) 的损失降低了与O相关的N-乙糖胺转移酶 (OGT) 的水平和活性,影响营养感应. HCF-1对于OGT稳定性和核定位至关重要,维持肝脏代谢调节.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 代谢调节 代谢调节 代谢调节
背景情况:
- 主细胞因子-1 (HCF-1) 是肝功能和新陈代谢的重要转录性核心调节剂.
- 与O相关的N-乙糖胺转移酶 (OGT) 通过蛋白质O-GlcNAcylation调节代谢途径,这是一个关键的翻译后修饰和营养传感器.
研究的目的:
- 研究肝细胞特异性HCF-1枯竭在调节OGT稳定性,活性和细胞局部化的作用.
- 阐明HCF-1和OGT在肝脏营养感应和代谢调节中的机械联系.
主要方法:
- 使用了一种转基因小鼠模型,具有肝细胞特异性的HCF-1删除.
- 使用分子和组织学技术评估了OGT表达,O-GlcNAcylation活性,蛋白质水平,mRNA表达和细胞局部化.
- 与对照小鼠和肝细胞在营养缺乏条件下的结果进行比较.
主要成果:
- 肝细胞特异性HCF-1删除导致HCF-1蛋白,OGT水平和全球O-GlcNAcylation的降低.
- 失去了HCF-1并没有影响OGTmRNA水平,这表明后翻译调节.
- 观察到核OGT和O-GlcNAcylation的减少,类似于禁食条件,肝细胞粘附受损.
结论:
- 在肝细胞中,HCF-1对于维持OGT稳定性,活性和核定位至关重要.
- HCF-1和OGT在肝脏的营养感知和代谢调节中发挥着协调作用.
- 这些发现确定了HCF-1和OGT在肝脏代谢平衡中的机制联系.
关键词:
这是一种O-GlcNAcylation.与O相关的N-乙糖胺 (O-GlcNAc) 转移酶 (OGT) 发生关系肝细胞 肝细胞 肝细胞宿主细胞因子-1-1肝脏 肝脏 肝脏 肝脏营养感应. 营养感应.更多相关视频
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