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Hsp90应激增强通过诱导阳积分的快速细胞适应
Guangbo Chen1, William D Bradford, Chris W Seidel
1Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, Missouri 64110, USA.
Nature
|January 31, 2012
概括
压力可以诱导体积,不均数的染色体,在芽的酵母. 这种与Hsp90相关的染色体不稳定性,促进了快速适应和耐药性,揭示了Hsp90在进化中的新角色.
科学领域:
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
- 进化生物学 进化生物学
背景情况:
- 状体,一个异常的染色体数,在癌症中很常见,在压力下赋予了适应性特征.
- 最近的研究突出显示,状体是大效应突变,在各种条件下驱动适应.
研究的目的:
- 为了研究是否可诱导性压力在芽酵母 (Saccharomyces cerevisiae) 形积分.
- 探索Hsp90伴侣复合体在压力诱导的染色体不稳定性和适应中的作用.
主要方法:
- 通过抑制Hsp90和发芽酵母的热冲击来诱导压力.
- 分析染色体不稳定性和型多样性.
- 研究无体殖民地耐药性的遗传基础.
主要成果:
- 蛋白质毒性压力 (Hsp90抑制,热冲击) 显著增加了染色体不稳定性和型多样性.
- 诱导的不稳定性与Hsp90在动态组装中的作用有关.
- 抑制Hsp90导致具有XV染色体增长的耐药殖民地,这是涉及多个基因的定量特征.
- 短期的Hsp90应激暴露加速了通过形增生症对其他细胞毒性化合物的适应.
结论:
- 无积体症是真核生物中一种应激诱导的突变,促进了快速的表型进化和耐药性.
- 在压力条件下,Hsp90在调节适应性特征的出现方面发挥着至关重要的作用.
- 这项研究揭示了Hsp90在调解压力诱导的形积分和适应方面的新功能.
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