Chfr定义了一个线粒体应激检查点,延迟进入元相
D M Scolnick1, T D Halazonetis
1The Wistar Institute, Philadelphia, Pennsylvania 19104-4268, USA.
Nature
|August 10, 2000
概括
该CHFR基因作为一个关键的检查点,延迟细胞循环进入转化阶段在线索应激下. 它在癌细胞中的失活会损害这种延迟,影响癌症治疗策略.
科学领域:
- 细胞生物学 细胞生物学
- 分子瘤学分子瘤学
- 遗传学 是一个遗传学.
背景情况:
- 向微管细胞的化学物质会诱导线粒应激,影响关键的细胞分裂过程.
- 人类癌症往往对线粒激应有敏感性,这表明潜在的检查点缺陷.
- 已知的线粒体检查点基因在人类癌症中很少被禁用.
研究的目的:
- 识别和表征涉及线粒体应激反应的新型基因.
- 调查CHFR基因在线粒体检查点控制中的作用.
- 探索CHFR功能在人类癌症中的影响.
主要方法:
- 对人类癌细胞系中的基因失活 (突变或缺乏表达) 的分析.
- 实验性抑制中心体分离以诱导线性应激.
- 评估细胞循环进展 (进入元相) 在线粒体应激下.
- 野生类型的CHFR在子宫外表达以恢复功能.
主要成果:
- 发现CHFR基因在8个被检查的人类癌症细胞系中的4个中被禁用.
- 正常细胞和表达野生型CHFR的癌细胞在线粒体应激时表现出延迟进入元相.
- 缺乏CHFR功能的癌细胞系立即进入转化阶段.
- 恢复CHFR功能恢复了细胞周期延迟,并提高了在线粒激应下的存活率.
结论:
- CHFR定义了一种新的检查点,该检查点延迟了对线粒体应激反应的转化阶段进入.
- 人类癌症中,CHFR功能的失活会导致线粒体应激反应的缺陷.
- 在癌症治疗中,CHFR可能是潜在的治疗点.
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