alexa Nuclear DNA damage as a direct cause of aging.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Best BP

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Abstract This paper presents evidence that damage to nuclear DNA (nDNA) is a direct cause of aging in addition to the effects of nDNA damage on cancer, apoptosis, and cellular senescence. Many studies show significant nDNA damage with age, associated with declining nDNA repair, and this evidence for the decline of nDNA repair with age is also reviewed. Mammalian lifespans correlate with the effectiveness of nDNA repair. The most severe forms of accelerated aging disease in humans are due to nDNA repair defects, and many of these diseases do not exhibit increased cancer incidence. High rates of cellular senescence and apoptosis due to high rates of nDNA damage are apparently the main cause of the elderly phenotype in these diseases. Transgenic mice with high rates of cellular senescence and apoptosis exhibit an elderly phenotype, whereas some strains with low rates of cellular senescence and apoptosis show extended lifespan. Age-associated increases of nDNA damage in the brain may be problematic for rejuvenation because neurons may be difficult to replace and artificial nDNA repair could be difficult. This article was published in Rejuvenation Res and referenced in Journal of Stem Cell Research & Therapy

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