科研之友
微信
新浪微博
Facebook
分享链接
摘要
Intrinsic limits on cellular proliferation in human somatic tissue serves as a tumor suppressor mechanism by restricting cell growth in aged cells with accrued pre-cancerous mutations: This is accompanied by the potential cost of restricting regenerative capacity and contributing to cellular and organismal aging. Emerging data support a model where telomere erosion controls proliferative boundaries through the progressive change of telomere structure from a protected state, through two distinct states of telomere deprotection. In this model telomeres facilitate a controlled permanent cell cycle arrest with a stable diploid genome during differentiation and may serve as an epigenetic sensor of general stress in DNA metabolism processes.
- 出版日期2012-12
