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Summary A key tenet of the oxidative stress theory of aging is that levels of accrued oxidative damage increase with age. Differences in damage generation and accumulation therefore may underlie the natural variation in species longevity. We compared age-related profiles of whole-organism lipid...
Summary The immune response is the result of the interplay between innate and adaptive immunity, yet the impact of aging on this interaction is unclear. Addressing this fundamental question will be critical for the development of effective vaccines for the rapidly rising older subpopulation that...
Summary Questions about mechanisms, about the direction of causality, and about cellular heterogeneity complicate interpretation of claims associating short telomeres with adverse health outcomes.
Summary A dichotomy exists between germ and somatic cells in most organisms, such that somatic cell lineages proliferate for a single generation, whereas the germ cell lineage has the capacity to proliferate from one generation to the next, indefinitely. Several theories have been proposed to...
Summary A partial reduction in food intake has been found to increase lifespan in many different organisms. We report here a new dietary restriction regimen in the nematode Caenorhabditis elegans, based on the standard agar plate lifespan assay, in which adult worms are maintained in the absence...
Summary Dietary restriction (DR) is well known as a nongenetic intervention that robustly extends lifespan in a variety of species; however, its underlying mechanisms remain unclear. We have found in Caenorhabditis elegans that dietary deprivation (DD) during adulthood, defined as removal of...
Summary Blood leukocytes are a heterogeneous mixture of cell types whose telomere lengths differ greatly, reflecting variation in stem cell turnover and recruitment, expansion and replacement of more mature cell types as well as variable telomere loss and telomere repair. These differences in...
Summary Cherkas et al. provide a new, biological approach to a classic problem in anthropology – the estimation of age.
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