1. Joined
    06 Mar '12
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    30 Aug '14 15:192 edits
    http://phys.org/news/2014-08-factor-naked-mole-rat-cells.html
    "...Scientists at the Barshop Institute for Longevity and Aging Studies, part of the School of Medicine at the UT Health Science Center at San Antonio, have found another secret of longevity in the tissues of the longest-lived rodent, the naked mole rat.
    They reported that a factor in the cells of naked mole rats protects and alters the activity of the proteasome, a garbage disposer for damaged and obsolete proteins.

    The factor also protects proteasome function in human, mouse and yeast cells when challenged with various proteasome poisons, studies showed. These proteasomes usually rapidly stop functioning, leading to the accumulation of damaged proteins that further impair cell function, contributing to the vicious cycle that leads to cell death.



    They reported that a factor in the cells of naked mole rats protects and alters the activity of the proteasome, a garbage disposer for damaged and obsolete proteins.

    The factor also protects proteasome function in human, mouse and yeast cells when challenged with various proteasome poisons, studies showed. These proteasomes usually rapidly stop functioning, leading to the accumulation of damaged proteins that further impair cell function, contributing to the vicious cycle that leads to cell death.

    "I think this factor is part of an overall process or mechanism by which naked mole rats maintain their protein quality," study first author Karl Rodriguez, Ph.D., said.

    Generally, as an organism ages, not only are there more damaged proteins in need of disposal, but the proteasome itself becomes damaged and less efficient in clearing out the damaged proteins.

    As a result, protein quality declines and this contributes to the functional declines seen during aging. Enhancement of protein quality, meanwhile, leads to longer life in yeast, worms, fruit flies and naked mole rats, Dr. Rodriguez said.

    ....

    Naked mole rats, which burrow through underground tunnels in their native East Africa, are nearly hairless rodents. They live as long as 32 years. Naked mole rats maintain cancer-free good health and reproductive potential well into their third decade of life.

    .."

    I believe the deleterious effects of the build up of damaged proteins in cells as we age far better explains the general deterioration that comes with the ageing process that inevitably leads to age-related death far better than either the now largely debunked free-radical theory or the shortening telomeres theory.