SUMOylation间接抑制了肠道上皮细胞中HIF-1α通路的活性
Mykyta I Malkov1, Darragh Flood1, Cormac T Taylor1
1Conway Institute of Biomolecular and Biomedical Research and School of Medicine, University College Dublin, Belfield, Ireland.
The Journal of biological chemistry
|September 24, 2023
概括
SUMOylation间接抑制了缺氧诱导因子1-alpha (HIF-1α) 在肠道细胞中的稳定性和活性. 抑制SUMOylation可以提高HIF-1α水平和转录活性,从而揭示出一种新的调节机制.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 低氧诱导因子 (HIF) 调节细胞对低氧的反应.
- 较少了解HIF的氧气独立的翻译后修改.
- 在HIF途径中SUMOylation的作用受到辩论.
研究的目的:
- 研究SUMOylation对肠上皮细胞中的HIF-1α表达和活性的影响.
- 探索 SUMO-1,SUMO-2,SUMO-3 和 SUMOylation 抑制对 HIF-1α 的影响.
- 阐明SUMOylation影响HIF-1α的间接机制.
主要方法:
- 使用的Caco-2肠上皮细胞.
- 过度表达的 SUMO-1,SUMO-2 和 SUMO-3.
- 使用选择性抑制剂TAK-981.1进行抑制的SUMOylation.
- 用于诱导缺氧的二甲基糖氨酸 (DMOG).
- 执行记者测试以测量转录活动.
- 分析了HIF-1α蛋白水平和核积累.
主要成果:
- TAK-981治疗降低了全球SUMOylation,并增加了HIF-1α蛋白水平.
- 过度表达SUMO-1和SUMO-2/3降低了HIF-1α蛋白水平.
- 抑制SUMOylation增强了HIF-1α的转录活性,而SUMO过度表达则减少了它.
- 在SUMO-1过度表达时,HIF-1α核积累减少.
- HIF-1α没有直接SUMOylated,表明间接的监管效应.
结论:
- SUMOylation 作为 HIF-1α 蛋白稳定性和转录活性的间接抑制剂.
- SUMOylation 对肠道上皮细胞中的HIF-1α核积累产生负面影响.
- 向SUMOylation可能为调节HIF活动提供一种新的治疗策略.
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