Unbalanced Growth, Senescence and Aging.

Unbalanced Growth, Senescence and Aging.
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DOI:
10.1007/978-3-319-57127-0_8
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发表时间:
2017
影响因子:
--
通讯作者:
Kennedy BK
Kennedy BK
中科院分区:
医学4区
文献类型:
--
作者:
Polymenis M;Kennedy BK

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通常,细胞通过分裂来平衡生长。协调生长输入与细胞分裂确保在有足够的细胞材料可用时适当的分裂时间,并影响细胞增殖的总体速度。在一个非常基本的层面上,细胞的复制寿命——定义为细胞可以分裂的次数——是细胞周期控制的一种表现。因此,对有丝分裂细胞分裂的控制,特别是对新一轮细胞分裂的控制,与细胞的复制老化密切相关。在本章中,我们回顾了我们目前对不平衡生长和分裂如何显著影响细胞增殖潜力的理解及其不足,通常导致细胞和生物体衰老表型。生长和分裂之间的相互作用也支持细胞衰老(即不能分裂)和静止(当细胞退出细胞周期但仍保留其分裂能力时)。
Usually, cells balance their growth with their division. Coordinating growth inputs with cell division ensures the proper timing of division when sufficient cell material is available and affects the overall rate of cell proliferation. At a very fundamental level, cellular replicative lifespan—defined as the number of times a cell can divide, is a manifestation of cell cycle control. Hence, control of mitotic cell divisions, especially when the commitment is made to a new round of cell division, is intimately linked to replicative aging of cells. In this chapter, we review our current understanding, and its shortcomings, of how unbalanced growth and division, can dramatically influence the proliferative potential of cells, often leading to cellular and organismal aging phenotypes. The interplay between growth and division also underpins cellular senescence (i.e., inability to divide) and quiescence, when cells exit the cell cycle but still retain their ability to divide.
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