在Birt-Hogg-Dubé综合征中通过转录和蛋白质组分析来表征FLCN的瘤抑制活性
Andrew Tee1, Rachel-Ann Jones1, Elaine A Dunlop1
1Cardiff University.
Research square
|July 9, 2024
概括
在Birt-Hogg-Dubé综合征患者中,毛囊素 (FLCN) 的损失通过损害细胞周期控制和DNA损伤反应增加了癌风险. 这导致不受控制的细胞增殖和瘤形成.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 伯特-霍格-杜贝综合征 (BHD) 给所有脏瘤亚型带来独特的敏感性.
- 在BHD中驱动癌变的确切机制在很大程度上是未知的.
研究的目的:
- 为了研究毛囊素 (FLCN) 在癌发生中的作用.
- 为了阐明BHD相关癌背后的分子机制.
主要方法:
- 使用了人类近邻脏 (HK2) 细胞与长期的FLCN敲击.
- 进行了转录组,蛋白组和相互作用组分析.
- 研究了细胞周期控制和DNA损伤反应 (DDR) 途径.
- 使用*C. elegans*模型来评估DNA损伤反应.
主要成果:
- FLCN的淘汰增加了HK2细胞的瘤生成潜力和球形形成.
- FLCN损失改变了基因表达,丰富了细胞周期控制基因.
- 观察到受损的G1/S细胞周期检查点信号,高林D1 (CCND1) 和高酸化视网膜母细胞瘤1 (RB1).
- 确定了FLCN和DNA依赖蛋白激酶 (DNA-PK) 之间的新型相互作用,该相互作用对辐射有反应.
- 脱离FLCN导致DNA损伤标志物 (γH2AX) 和RB1酸化升高,这表明DNA损伤期间细胞循环控制有缺陷.
- 缺少Flcn的*C. elegans*在DNA损伤后显示细胞循环停止受损.
结论:
- 长期的FLCN损失通过破坏细胞周期控制和DNA损伤反应,有助于BHD中癌的发展.
- 由于FLCN缺乏,细胞周期检查点和DNA修复机制受损与BHD相关的脏瘤发生有关.
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