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Senior Scholar Award in Aging
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Mark
Mayford,
Ph.D.
Scripps Research Institute
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Mutagenic Screen for Longevity Genes in Mice
Generalized aging at the cellular level is thought to arise from the accumulation of damage
to protein and nucleic acids that eventually results in the impairment of normal cellular
function or transformation of the cells to a cancerous form of growth. How does this
damage occur? One hypothesis that is consistent with invertebrate genetic studies as well
as with comparative studies of longevity across species is the “free radical theory of
aging”. According to this view, it is the oxidative damage to proteins, lipids and DNA
caused by free radicals produced during normal metabolic activity that eventually leads to
impaired cellular function and aging. Genetic screens in invertebrates such as Drosophila
have been successful in identifying mutant animals with up to a twofold increase in
longevity and these animals often show increased resistance to oxidative stress. However
much less is known about aging in mammals. We propose to employ genetic screens in
the mouse to identify mutant animals with increased resistance to or decreased production
of free radicals. Mutant animals identified on the basis of altered free radical response will
then be analyzed in aging studies to determine whether they show a delay in the onset of
various age related disorders and an increase in longevity. The results should provide a
test of the free radical theory of aging in mammals and potential therapeutic targets for the
numerous age related disorders thought to involve free radical induced cellular damage.
Contact
Dr. Mayford.
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