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Comments on Leroi AM et al. (2005) Mechanisms of Ageing & Development "What evidence is there for the existence of individual genes with antagonistic pleitropic effects?" (0)
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Leroi AM, Bartke A, De Benedictis G, Franceschi C, Gartner A, Gonos E, Feder ME, Kivisild T, Lee S, Kartal-Ozer N, Schumacher M, Sikora E, Slagboom E, Tatar M, Yashin AI, Vijg J, & Zwaan B (2005). What evidence is there for the existence of individual genes with antagonistic pleitropic effects?. Mechanisms of Ageing & Development, 126, 421-429. doi:10.1016/j.mad.2004.07.012
Classical evolutionary theory predicts the existence of genes with antagonistic effects on longevity and various components of early-life fitness. Quantitative genetic studies have provided convincing evidence that such genes exist. However, antagonistic pleiotropic effects have rarely been attributed to individual loci. We examine several classes of longevity-assurance genes: those involved in regulation of the gonad; the insulin-like growth factor pathway; free-radical scavenging; heat shock proteins and apoptosis. We find initial evidence that antagonistic pleiotropic effects are pervasive in each of these classes of genes and in various model systems-although most studies lack explicit studies of fitness components. This is particularly true of human studies. Very little is known about the early-life fitness effects of longevity loci. Given the possible medical importance of such effects we urge their future study.
Authors: Leroi AM, Bartke A, De Benedictis G, Franceschi C, Gartner A, Gonos E, Feder ME, Kivisild T, Lee S, Kartal-Ozer N, Schumacher M, Sikora E, Slagboom E, Tatar M, Yashin AI, Vijg J, Zwaan B