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The Ground Zero of Organismal Life and Aging

期刊

TRENDS IN MOLECULAR MEDICINE
卷 27, 期 1, 页码 11-19

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CELL PRESS
DOI: 10.1016/j.molmed.2020.08.012

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  1. National Institutes of Health

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Cells can naturally or be forced to transition to a state of significantly lower biological age, or rejuvenation. These processes may converge to the mid-embryonic state, 'ground zero', where it is possible to achieve a biological age lower than naturally through genome editing and prolonging the rejuvenation phase.
Cells may naturally proceed or be forced to transition to a state with a radically lower biological age, that is, be rejuvenated. Examples are the conversion of somatic cells to induced pluripotent stem cells and rejuvenation of the germline with each generation. We posit that these processes converge to the same 'ground zero', the mid-embryonic state characterized by the lowest biological age where both organismal life and aging begin. It may also be related to the phylotypic state. The ground zero model clarifies the relationship between aging, development, rejuvenation, and de-differentiation, which are distinct throughout life. By extending the rejuvenation phase during early embryogenesis and editing the genome, it may be possible to achieve the biological age at the ground zero lower than that achieved naturally.

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