在Birt-Hogg-Dubé综合征细胞模型中通过转录和蛋白质组分析来描述FLCN的瘤抑制活性
Rachel-Ann Jones1, Elaine A Dunlop1, Jesse D Champion1
1Division of Cancer and Genetics, Cardiff University, Heath Park, Cardiff, CF14 4XN, UK.
Oncogene
|March 26, 2025
概括
伯特-霍格-杜贝综合征 (BHD) 细胞中的毛囊素 (FLCN) 蛋白质的损失会损害DNA损伤反应和细胞周期控制,增加癌症风险. 这项研究揭示了FLCNN.
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) 患者对所有脏瘤亚型的敏感性增加.
- 驱动BHD癌症发生的精确机制在很大程度上是未知的.
- 了解毛囊素 (FLCN) 蛋白质的作用对于BHD癌症研究至关重要.
研究的目的:
- 调查FLCN在BHD癌发生中的作用.
- 阐明在FLCN缺乏细胞中增加瘤发生的基础分子机制.
- 为了确定受FLCN损失影响的关键细胞通路.
主要方法:
- 使用了人类近邻脏 (HK2) 细胞与长期的FLCN敲击.
- 进行了转录基因和蛋白质基因分析以确定受影响的途径.
- 进行了FLCN相互作用查,并评估了DNA损伤反应 (DDR) 标志物.
- 通过循环素D1 (CCND1) 和视网膜母细胞瘤1 (RB1) 的酸化,研究了细胞循环控制.
- 在Flcn-knockdownC. elegans中检查了DNA损伤诱导的细胞循环停止.
主要成果:
- 长期的FLCN淘汰增加了HK2细胞的瘤发生潜力,由增强的球形形成表明.
- FLCN损失与细胞周期控制和DNA损伤反应 (DDR) 途径有关,具有丰富的细胞周期基因.
- 由于CCND1和RB1过酸化的增加,观察到受损的G1/S细胞周期检查点信号.
- 发现FLCN与DNA依赖蛋白激酶 (DNA-PK) 结合,这种相互作用对辐射敏感.
- 在DNA损伤期间,FLCN的淘汰导致DNA损伤标记物 (γH2AX) 的增加和持续的RB1酸化,这表明细胞周期控制有缺陷.
- 在DNA损伤后,Flcn-knockdown C. elegans显示细胞循环停止受损.
结论:
- 在BHD中长期丧失FLCN功能与DNA损伤反应受损和细胞周期控制缺陷有关.
- 这些细胞功能障碍,包括细胞周期检查点受损,可能导致BHD患者观察到的癌症风险增加.
- FLCN和DNA-PK之间的新型相互作用需要在BHD相关的癌症发生的背景下进行进一步的研究.
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