HIB/SPOP通过调节RNA聚合酶II组件的稳定性来抑制Ci/Gli介导的瘤发生
Yuxue Gao1, Zhaoliang Shan1, Chunhua Jian1
1State Key Laboratory of Pharmaceutical Biotechnology and MOE Key Laboratory of Model Animals for Disease Study, Jiangsu Key Laboratory of Molecular Medicine, Model Animal Research Center, School of Medicine, Nanjing University, Nanjing 210061, China.
iScience
|August 9, 2023
概括
过度表达Ci/Gli和击倒Drosophila中的蜂会导致类似瘤的眼睛生长. HIB/SPOP通过控制蛋白质稳定性来抑制这种作用,揭示了瘤发生的双重作用.
科学领域:
- 发展生物学 发展生物学
- 癌症生物学 癌症生物学
- 分子遗传学 分子遗传学
背景情况:
- 由Ci/Gli转录因子调节的刺 (Hh) 信号传递对发育和恒温至关重要.
- Hh信号的失调与人类疾病,特别是癌症有关.
- 影响瘤发生中的Ci/Gli活性的辅因子在很大程度上仍未被描述.
研究的目的:
- 为了确定影响Ci/Gli介导瘤发生的新型辅因子.
- 阐明HIB/SPOP调节Ci/Gli活动和瘤形成的机制.
主要方法:
- 在Drosophila melanogaster中进行基因查,以确定影响Ci/Gli活性的基因.
- 分子测定用于研究蛋白质-蛋白质相互作用和降解途径.
- 对RNA聚合酶II (RNAPII) 组件稳定性的分析.
主要成果:
- 单独过度表达活性Ci并没有诱导类似瘤的表型.
- 活性Ci的综合过度表达和hib的淘汰导致了Drosophila中显著的瘤样大眼睛表型.
- 发现HIB/SPOP通过调节RNAPII组件Rpb3和Rpb7的稳定性以E3酶依赖的方式来抑制Ci/Gli介导的瘤发生.
- 还表明,Ci/Gli促进了HIB/SPOP介导的Rpb7和Rpb3.3的降解.
结论:
- Ci/Gli需要特定的RNAPII组件来诱导类似瘤的眼睛表型.
- HIB/SPOP通过控制Ci/Gli和RNAPII组件的蛋白质稳定性,在缓解Ci/Gli/RNAPII介导的瘤发生方面发挥双重作用.
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