极性和差异性遗传 - - 生命的普遍属性?
1Department of Microbiology, Center for Cell Signaling, University of Virginia School of Medicine, Charlottesville, VA 22908-0577, USA. igm9c@virginia.edu
Cell
|December 2, 2008
概括
细胞极化很可能是为了通过分离受损组件来管理细胞衰老而演变的. 这一基本过程对于复杂生物体的细胞分化和发育至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 进化生物学 进化生物学
- 发展生物学 发展生物学
背景情况:
- 细胞极化是一个基本的细胞过程.
- 它的进化起源和多样化的功能是活跃研究的领域.
研究的目的:
- 探索细胞两极化的进化起源.
- 了解细胞极性在不同生物体中的不同作用.
主要方法:
- 对细菌和酵母细胞分裂的比较分析.
- 在复杂的多细胞生物体中检查极性函数.
主要成果:
- 有证据表明,细胞两极分化是为了分离受损物质而进化的,在分裂过程中将衰老局限于一个子细胞.
- 在真核生物中,极性促进细胞成分的差异遗传,这对于细胞分化和形态发生至关重要.
结论:
- 细胞极化起源于古代,最初用于管理细胞衰老.
- 它的功能多样化了,在复杂的生命形式的发育和细胞类型生成中发挥了关键作用.
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